// Copyright (C) 2022 The Qt Company Ltd.
// Copyright (C) 2022 Intel Corporation.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only

#include <QtTest/qtestcase.h>
#include <QtTest/qtestassert.h>

#include <QtCore/qbytearray.h>
#include <QtCore/qcoreapplication.h>
#include <QtCore/qdebug.h>
#include <QtCore/qdir.h>
#include <QtCore/qdiriterator.h>
#include <QtCore/qfile.h>
#include <QtCore/qfileinfo.h>
#include <QtCore/qfloat16.h>
#include <QtCore/qlibraryinfo.h>
#include <QtCore/qlist.h>
#include <QtCore/qmetaobject.h>
#include <QtCore/qobject.h>
#include <QtCore/qstringlist.h>
#include <QtCore/qtemporarydir.h>
#include <QtCore/qthread.h>
#include <QtCore/qvarlengtharray.h>
#include <QtCore/private/qlocking_p.h>
#include <QtCore/private/qtools_p.h>
#include <QtCore/private/qwaitcondition_p.h>

#include <QtCore/qtestsupport_core.h>

#include <QtTest/private/qtestlog_p.h>
#include <QtTest/private/qtesttable_p.h>
#include <QtTest/qtestdata.h>
#include <QtTest/private/qtestresult_p.h>
#include <QtTest/private/qsignaldumper_p.h>
#include <QtTest/private/qbenchmark_p.h>
#include <QtTest/private/cycle_p.h>
#include <QtTest/private/qtestblacklist_p.h>
#if defined(HAVE_XCTEST)
#include <QtTest/private/qxctestlogger_p.h>
#endif
#if defined Q_OS_MACOS
#include <QtTest/private/qtestutil_macos_p.h>
#endif

#if defined(Q_OS_DARWIN)
#include <QtTest/private/qappletestlogger_p.h>
#endif

#include <algorithm>
#include <array>
#if !defined(Q_OS_INTEGRITY) || __GHS_VERSION_NUMBER > 202014
#  include <charconv>
#else
// Broken implementation, causes link failures just by #include'ing!
#  undef __cpp_lib_to_chars     // in case <version> was included
#endif
#include <chrono>
#include <cmath>
#include <limits>
#include <memory>
#include <mutex>
#include <numeric>

#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>

#if defined(Q_OS_LINUX)
#include <sys/types.h>
#include <fcntl.h>
#endif

#ifdef Q_OS_WIN
# include <iostream>
# if !defined(Q_CC_MINGW) || (defined(Q_CC_MINGW) && defined(__MINGW64_VERSION_MAJOR))
#  include <crtdbg.h>
# endif
#include <qt_windows.h> // for Sleep
#endif
#ifdef Q_OS_UNIX
#include <QtCore/private/qcore_unix_p.h>

#include <errno.h>
#if __has_include(<paths.h>)
# include <paths.h>
#endif
#include <signal.h>
#include <time.h>
#include <sys/mman.h>
#include <sys/uio.h>
#include <sys/wait.h>
#include <unistd.h>
# if !defined(Q_OS_INTEGRITY)
#  include <sys/resource.h>
# endif
# ifndef _PATH_DEFPATH
#  define _PATH_DEFPATH     "/usr/bin:/bin"
# endif
# ifndef SIGSTKSZ
#  define SIGSTKSZ          0       /* we have code to set the minimum */
# endif
# ifndef SA_RESETHAND
#  define SA_RESETHAND      0
# endif
#endif

#if defined(Q_OS_MACOS)
#include <IOKit/pwr_mgt/IOPMLib.h>
#include <mach/task.h>
#include <mach/mach_init.h>
#include <CoreFoundation/CFPreferences.h>
#endif

#include <vector>

QT_BEGIN_NAMESPACE

using namespace Qt::StringLiterals;

using QtMiscUtils::toHexUpper;
using QtMiscUtils::fromHex;

namespace {
enum DebuggerProgram { None, Gdb, Lldb };

#if defined(Q_OS_UNIX) && (!defined(Q_OS_WASM) || QT_CONFIG(thread))
static struct iovec IoVec(struct iovec vec)
{
    return vec;
}
static struct iovec IoVec(const char *str)
{
    struct iovec r = {};
    r.iov_base = const_cast<char *>(str);
    r.iov_len = strlen(str);
    return r;
}

template <typename... Args> static ssize_t writeToStderr(Args &&... args)
{
    struct iovec vec[] = { IoVec(std::forward<Args>(args))... };
    return ::writev(STDERR_FILENO, vec, std::size(vec));
}

// async-signal-safe conversion from int to string
struct AsyncSafeIntBuffer
{
    // digits10 + 1 for all possible digits
    // +1 for the sign
    // +1 for the terminating null
    static constexpr int Digits10 = std::numeric_limits<int>::digits10 + 3;
    std::array<char, Digits10> array;
    constexpr AsyncSafeIntBuffer() : array{} {}     // initializes array
    AsyncSafeIntBuffer(Qt::Initialization) {}       // leaves array uninitialized
};

static struct iovec asyncSafeToString(int n, AsyncSafeIntBuffer &&result = Qt::Uninitialized)
{
    char *ptr = result.array.data();
    if (false) {
#ifdef __cpp_lib_to_chars
    } else if (auto r = std::to_chars(ptr, ptr + result.array.size(), n, 10); r.ec == std::errc{}) {
        ptr = r.ptr;
#endif
    } else {
        // handle the sign
        if (n < 0) {
            *ptr++ = '-';
            n = -n;
        }

        // find the highest power of the base that is less than this number
        static constexpr int StartingDivider = ([]() {
            int divider = 1;
            for (int i = 0; i < std::numeric_limits<int>::digits10; ++i)
                divider *= 10;
            return divider;
        }());
        int divider = StartingDivider;
        while (divider && n < divider)
            divider /= 10;

        // now convert to string
        while (divider > 1) {
            int quot = n / divider;
            n = n % divider;
            divider /= 10;
            *ptr++ = quot + '0';
        }
        *ptr++ = n + '0';
    }

#ifndef QT_NO_DEBUG
    // this isn't necessary, it just helps in the debugger
    *ptr = '\0';
#endif
    struct iovec r;
    r.iov_base = result.array.data();
    r.iov_len = ptr - result.array.data();
    return r;
};
#elif defined(Q_OS_WIN)
// Windows doesn't need to be async-safe
template <typename... Args> static void writeToStderr(Args &&... args)
{
    (std::cerr << ... << args);
}

static std::string asyncSafeToString(int n)
{
    return std::to_string(n);
}
#endif // defined(Q_OS_UNIX)
} // unnamed namespace

static bool alreadyDebugging()
{
#if defined(Q_OS_LINUX)
    int fd = open("/proc/self/status", O_RDONLY);
    if (fd == -1)
        return false;
    char buffer[2048];
    ssize_t size = read(fd, buffer, sizeof(buffer) - 1);
    if (size == -1) {
        close(fd);
        return false;
    }
    buffer[size] = 0;
    const char tracerPidToken[] = "\nTracerPid:";
    char *tracerPid = strstr(buffer, tracerPidToken);
    if (!tracerPid) {
        close(fd);
        return false;
    }
    tracerPid += sizeof(tracerPidToken);
    long int pid = strtol(tracerPid, &tracerPid, 10);
    close(fd);
    return pid != 0;
#elif defined(Q_OS_WIN)
    return IsDebuggerPresent();
#elif defined(Q_OS_MACOS)
    // Check if there is an exception handler for the process:
    mach_msg_type_number_t portCount = 0;
    exception_mask_t masks[EXC_TYPES_COUNT];
    mach_port_t ports[EXC_TYPES_COUNT];
    exception_behavior_t behaviors[EXC_TYPES_COUNT];
    thread_state_flavor_t flavors[EXC_TYPES_COUNT];
    exception_mask_t mask = EXC_MASK_ALL & ~(EXC_MASK_RESOURCE | EXC_MASK_GUARD);
    kern_return_t result = task_get_exception_ports(mach_task_self(), mask, masks, &portCount,
                                                    ports, behaviors, flavors);
    if (result == KERN_SUCCESS) {
        for (mach_msg_type_number_t portIndex = 0; portIndex < portCount; ++portIndex) {
            if (MACH_PORT_VALID(ports[portIndex])) {
                return true;
            }
        }
    }
    return false;
#else
    // TODO
    return false;
#endif
}

static bool hasSystemCrashReporter()
{
#if defined(Q_OS_MACOS)
    return QTestPrivate::macCrashReporterWillShowDialog();
#else
    return false;
#endif
}

static void maybeDisableCoreDump()
{
#ifdef RLIMIT_CORE
    bool ok = false;
    const int disableCoreDump = qEnvironmentVariableIntValue("QTEST_DISABLE_CORE_DUMP", &ok);
    if (ok && disableCoreDump) {
        struct rlimit limit;
        limit.rlim_cur = 0;
        limit.rlim_max = 0;
        if (setrlimit(RLIMIT_CORE, &limit) != 0)
            qWarning("Failed to disable core dumps: %d", errno);
    }
#endif
}

static DebuggerProgram debugger = None;
static void prepareStackTrace()
{

    bool ok = false;
    const int disableStackDump = qEnvironmentVariableIntValue("QTEST_DISABLE_STACK_DUMP", &ok);
    if (ok && disableStackDump)
        return;

    if (hasSystemCrashReporter())
        return;

#if defined(Q_OS_MACOS)
    #define CSR_ALLOW_UNRESTRICTED_FS (1 << 1)
    std::optional<uint32_t> sipConfiguration = qt_mac_sipConfiguration();
    if (!sipConfiguration || !(*sipConfiguration & CSR_ALLOW_UNRESTRICTED_FS))
        return; // LLDB will fail to provide a valid stack trace
#endif

#ifdef Q_OS_UNIX
    // like QStandardPaths::findExecutable(), but simpler
    auto hasExecutable = [](const char *execname) {
        std::string candidate;
        std::string path;
        if (const char *p = getenv("PATH"); p && *p)
            path = p;
        else
            path = _PATH_DEFPATH;
        for (const char *p = std::strtok(&path[0], ":'"); p; p = std::strtok(nullptr, ":")) {
            candidate = p;
            candidate += '/';
            candidate += execname;
            if (QT_ACCESS(candidate.data(), X_OK) == 0)
                return true;
        }
        return false;
    };

    static constexpr DebuggerProgram debuggerSearchOrder[] = {
#  if defined(Q_OS_QNX) || (defined(Q_OS_LINUX) && !defined(Q_OS_ANDROID))
        Gdb, Lldb
#  else
        Lldb, Gdb
#  endif
    };
    for (DebuggerProgram candidate : debuggerSearchOrder) {
        switch (candidate) {
        case None:
            Q_UNREACHABLE();
            break;
        case Gdb:
            if (hasExecutable("gdb")) {
                debugger = Gdb;
                return;
            }
            break;
        case Lldb:
            if (hasExecutable("lldb")) {
                debugger = Lldb;
                return;
            }
            break;
        }
    }
#endif // Q_OS_UNIX
}

#if !defined(Q_OS_WASM) || QT_CONFIG(thread)
static void printTestRunTime()
{
    const int msecsFunctionTime = qRound(QTestLog::msecsFunctionTime());
    const int msecsTotalTime = qRound(QTestLog::msecsTotalTime());
    const char *const name = QTest::currentTestFunction();
    writeToStderr("\n         ", name ? name : "[Non-test]",
                  " function time: ", asyncSafeToString(msecsFunctionTime),
                  "ms, total time: ", asyncSafeToString(msecsTotalTime), "ms\n");
}

static void generateStackTrace()
{
    if (debugger == None || alreadyDebugging())
        return;

#  if defined(Q_OS_UNIX) && !defined(Q_OS_WASM) && !defined(Q_OS_INTEGRITY)
    writeToStderr("\n=== Stack trace ===\n");

    // execlp() requires null-termination, so call the default constructor
    AsyncSafeIntBuffer pidbuffer;
    asyncSafeToString(getpid(), std::move(pidbuffer));

    // Note: POSIX.1-2001 still has fork() in the list of async-safe functions,
    // but in a future edition, it might be removed. It would be safer to wake
    // up a babysitter thread to launch the debugger.
    pid_t pid = fork();
    if (pid == 0) {
        // child process
        (void) dup2(STDERR_FILENO, STDOUT_FILENO); // redirect stdout to stderr

        switch (debugger) {
        case None:
            Q_UNREACHABLE();
            break;
        case Gdb:
            execlp("gdb", "gdb", "--nx", "--batch", "-ex", "thread apply all bt",
                   "--pid", pidbuffer.array.data(), nullptr);
            break;
        case Lldb:
            execlp("lldb", "lldb", "--no-lldbinit", "--batch", "-o", "bt all",
                   "--attach-pid", pidbuffer.array.data(), nullptr);
            break;
        }
        _exit(1);
    } else if (pid < 0) {
        writeToStderr("Failed to start debugger.\n");
    } else {
        int ret;
        EINTR_LOOP(ret, waitpid(pid, nullptr, 0));
    }

    writeToStderr("=== End of stack trace ===\n");
#  endif // Q_OS_UNIX && !Q_OS_WASM
}
#endif  // !defined(Q_OS_WASM) || QT_CONFIG(thread)

static bool installCoverageTool(const char * appname, const char * testname)
{
#if defined(__COVERAGESCANNER__) && !QT_CONFIG(testlib_selfcover)
    if (!qEnvironmentVariableIsEmpty("QT_TESTCOCOON_ACTIVE"))
        return false;
    // Set environment variable QT_TESTCOCOON_ACTIVE to prevent an eventual subtest from
    // being considered as a stand-alone test regarding the coverage analysis.
    qputenv("QT_TESTCOCOON_ACTIVE", "1");

    // Install Coverage Tool
    __coveragescanner_install(appname);
    __coveragescanner_testname(testname);
    __coveragescanner_clear();
    return true;
#else
    Q_UNUSED(appname);
    Q_UNUSED(testname);
    return false;
#endif
}

static bool isValidSlot(const QMetaMethod &sl)
{
    if (sl.access() != QMetaMethod::Private || sl.parameterCount() != 0
        || sl.returnType() != QMetaType::Void || sl.methodType() != QMetaMethod::Slot)
        return false;
    const QByteArray name = sl.name();
    return !(name.isEmpty() || name.endsWith("_data")
        || name == "initTestCase" || name == "cleanupTestCase"
        || name == "init" || name == "cleanup");
}

namespace QTestPrivate
{
    Q_TESTLIB_EXPORT Qt::MouseButtons qtestMouseButtons = Qt::NoButton;
}

namespace QTest
{

QString Internal::formatTryTimeoutDebugMessage(q_no_char8_t::QUtf8StringView expr, int timeout, int actual)
{
    return "QTestLib: This test case check (\"%1\") failed because the requested timeout (%2 ms) "
           "was too short, %3 ms would have been sufficient this time."_L1
            // ### Qt 7: remove the toString() (or earlier, when arg() can handle QUtf8StringView), passing the view directly
            .arg(expr.toString(), QString::number(timeout), QString::number(actual));
}

extern Q_TESTLIB_EXPORT int lastMouseTimestamp;

class WatchDog;

static QObject *currentTestObject = nullptr;
static QString mainSourcePath;
static bool inTestFunction = false;

#if defined(Q_OS_MACOS)
static IOPMAssertionID macPowerSavingDisabled = 0;
#endif

class TestMethods {
public:
    Q_DISABLE_COPY_MOVE(TestMethods)

    using MetaMethods = std::vector<QMetaMethod>;

    explicit TestMethods(const QObject *o, MetaMethods m = {});

    void invokeTests(QObject *testObject) const;

    static QMetaMethod findMethod(const QObject *obj, const char *signature);

private:
    bool invokeTest(int index, QLatin1StringView tag, WatchDog *watchDog) const;
    void invokeTestOnData(int index) const;

    QMetaMethod m_initTestCaseMethod; // might not exist, check isValid().
    QMetaMethod m_initTestCaseDataMethod;
    QMetaMethod m_cleanupTestCaseMethod;
    QMetaMethod m_initMethod;
    QMetaMethod m_cleanupMethod;

    MetaMethods m_methods;
};

TestMethods::TestMethods(const QObject *o, MetaMethods m)
    : m_initTestCaseMethod(TestMethods::findMethod(o, "initTestCase()"))
    , m_initTestCaseDataMethod(TestMethods::findMethod(o, "initTestCase_data()"))
    , m_cleanupTestCaseMethod(TestMethods::findMethod(o, "cleanupTestCase()"))
    , m_initMethod(TestMethods::findMethod(o, "init()"))
    , m_cleanupMethod(TestMethods::findMethod(o, "cleanup()"))
    , m_methods(std::move(m))
{
    if (m_methods.empty()) {
        const QMetaObject *metaObject = o->metaObject();
        const int count = metaObject->methodCount();
        m_methods.reserve(count);
        for (int i = 0; i < count; ++i) {
            const QMetaMethod me = metaObject->method(i);
            if (isValidSlot(me))
                m_methods.push_back(me);
        }
    }
}

QMetaMethod TestMethods::findMethod(const QObject *obj, const char *signature)
{
    const QMetaObject *metaObject = obj->metaObject();
    const int funcIndex = metaObject->indexOfMethod(signature);
    return funcIndex >= 0 ? metaObject->method(funcIndex) : QMetaMethod();
}

static int keyDelay = -1;
static int mouseDelay = -1;
static int eventDelay = -1;
#if QT_CONFIG(thread)
static int timeout = -1;
#endif
static bool noCrashHandler = false;

/*! \internal
    Invoke a method of the object without generating warning if the method does not exist
*/
static void invokeMethod(QObject *obj, const char *methodName)
{
    const QMetaObject *metaObject = obj->metaObject();
    int funcIndex = metaObject->indexOfMethod(methodName);
    if (funcIndex >= 0) {
        QMetaMethod method = metaObject->method(funcIndex);
        method.invoke(obj, Qt::DirectConnection);
    }
}

int defaultEventDelay()
{
    if (eventDelay == -1) {
        const QByteArray env = qgetenv("QTEST_EVENT_DELAY");
        if (!env.isEmpty())
            eventDelay = atoi(env.constData());
        else
            eventDelay = 0;
    }
    return eventDelay;
}

int Q_TESTLIB_EXPORT defaultMouseDelay()
{
    if (mouseDelay == -1) {
        const QByteArray env = qgetenv("QTEST_MOUSEEVENT_DELAY");
        if (!env.isEmpty())
            mouseDelay = atoi(env.constData());
        else
            mouseDelay = defaultEventDelay();
    }
    return mouseDelay;
}

int Q_TESTLIB_EXPORT defaultKeyDelay()
{
    if (keyDelay == -1) {
        const QByteArray env = qgetenv("QTEST_KEYEVENT_DELAY");
        if (!env.isEmpty())
            keyDelay = atoi(env.constData());
        else
            keyDelay = defaultEventDelay();
    }
    return keyDelay;
}
#if QT_CONFIG(thread)
static std::chrono::milliseconds defaultTimeout()
{
    if (timeout == -1) {
        bool ok = false;
        timeout = qEnvironmentVariableIntValue("QTEST_FUNCTION_TIMEOUT", &ok);

        if (!ok || timeout <= 0)
            timeout = 5*60*1000;
    }
    return std::chrono::milliseconds{timeout};
}
#endif

Q_TESTLIB_EXPORT bool printAvailableFunctions = false;
Q_TESTLIB_EXPORT QStringList testFunctions;
Q_TESTLIB_EXPORT QStringList testTags;

static void qPrintTestSlots(FILE *stream, const char *filter = nullptr)
{
    for (int i = 0; i < QTest::currentTestObject->metaObject()->methodCount(); ++i) {
        QMetaMethod sl = QTest::currentTestObject->metaObject()->method(i);
        if (isValidSlot(sl)) {
            const QByteArray signature = sl.methodSignature();
            if (!filter || QLatin1StringView(signature).contains(QLatin1StringView(filter), Qt::CaseInsensitive))
                fprintf(stream, "%s\n", signature.constData());
        }
    }
}

static void qPrintDataTags(FILE *stream)
{
    // Avoid invoking the actual test functions, and also avoid printing irrelevant output:
    QTestLog::setPrintAvailableTagsMode();

    // Get global data tags:
    QTestTable::globalTestTable();
    invokeMethod(QTest::currentTestObject, "initTestCase_data()");
    const QTestTable *gTable = QTestTable::globalTestTable();

    const QMetaObject *currTestMetaObj = QTest::currentTestObject->metaObject();

    // Process test functions:
    for (int i = 0; i < currTestMetaObj->methodCount(); ++i) {
        QMetaMethod tf = currTestMetaObj->method(i);

        if (isValidSlot(tf)) {

            // Retrieve local tags:
            QStringList localTags;
            QTestTable table;
            char *slot = qstrdup(tf.methodSignature().constData());
            slot[strlen(slot) - 2] = '\0';
            QByteArray member;
            member.resize(qstrlen(slot) + qstrlen("_data()") + 1);
            qsnprintf(member.data(), member.size(), "%s_data()", slot);
            invokeMethod(QTest::currentTestObject, member.constData());
            const int dataCount = table.dataCount();
            localTags.reserve(dataCount);
            for (int j = 0; j < dataCount; ++j)
                localTags << QLatin1StringView(table.testData(j)->dataTag());

            // Print all tag combinations:
            if (gTable->dataCount() == 0) {
                if (localTags.size() == 0) {
                    // No tags at all, so just print the test function:
                    fprintf(stream, "%s %s\n", currTestMetaObj->className(), slot);
                } else {
                    // Only local tags, so print each of them:
                    for (int k = 0; k < localTags.size(); ++k)
                        fprintf(
                            stream, "%s %s %s\n",
                            currTestMetaObj->className(), slot, localTags.at(k).toLatin1().data());
                }
            } else {
                for (int j = 0; j < gTable->dataCount(); ++j) {
                    if (localTags.size() == 0) {
                        // Only global tags, so print the current one:
                        fprintf(
                            stream, "%s %s __global__ %s\n",
                            currTestMetaObj->className(), slot, gTable->testData(j)->dataTag());
                    } else {
                        // Local and global tags, so print each of the local ones and
                        // the current global one:
                        for (int k = 0; k < localTags.size(); ++k)
                            fprintf(
                                stream, "%s %s %s __global__ %s\n", currTestMetaObj->className(), slot,
                                localTags.at(k).toLatin1().data(), gTable->testData(j)->dataTag());
                    }
                }
            }

            delete[] slot;
        }
    }
}

static int qToInt(const char *str)
{
    char *pEnd;
    int l = static_cast<int>(strtol(str, &pEnd, 10));
    if (*pEnd != 0) {
        fprintf(stderr, "Invalid numeric parameter: '%s'\n", str);
        exit(1);
    }
    return l;
}

Q_TESTLIB_EXPORT void qtest_qParseArgs(int argc, const char *const argv[], bool qml)
{
    int logFormat = -1; // Not set
    const char *logFilename = nullptr;

    QTest::testFunctions.clear();
    QTest::testTags.clear();

#if defined(Q_OS_MAC) && defined(HAVE_XCTEST)
    if (QXcodeTestLogger::canLogTestProgress())
        logFormat = QTestLog::XCTest;
#endif

    const char *testOptions =
         " New-style logging options:\n"
         " -o filename,format  : Output results to file in the specified format\n"
         "                       Use - to output to stdout\n"
         "                       Valid formats are:\n"
         "                         txt      : Plain text\n"
         "                         csv      : CSV format (suitable for benchmarks)\n"
         "                         junitxml : XML JUnit document\n"
         "                         xml      : XML document\n"
         "                         lightxml : A stream of XML tags\n"
         "                         teamcity : TeamCity format\n"
         "                         tap      : Test Anything Protocol\n"
         "\n"
         "     *** Multiple loggers can be specified, but at most one can log to stdout.\n"
         "\n"
         " Old-style logging options:\n"
         " -o filename         : Write the output into file\n"
         " -txt                : Output results in Plain Text\n"
         " -csv                : Output results in a CSV format (suitable for benchmarks)\n"
         " -junitxml           : Output results as XML JUnit document\n"
         " -xml                : Output results as XML document\n"
         " -lightxml           : Output results as stream of XML tags\n"
         " -teamcity           : Output results in TeamCity format\n"
         " -tap                : Output results in Test Anything Protocol format\n"
         "\n"
         "     *** If no output file is specified, stdout is assumed.\n"
         "     *** If no output format is specified, -txt is assumed.\n"
         "\n"
         " Test log detail options:\n"
         " -silent             : Log failures and fatal errors only\n"
         " -v1                 : Log the start of each testfunction\n"
         " -v2                 : Log each QVERIFY/QCOMPARE/QTEST (implies -v1)\n"
         " -vs                 : Log every signal emission and resulting slot invocations\n"
         "\n"
         "     *** The -silent and -v1 options only affect plain text output.\n"
         "\n"
         " Testing options:\n"
         " -functions          : Returns a list of current testfunctions\n"
         " -datatags           : Returns a list of current data tags.\n"
         "                       A global data tag is preceded by ' __global__ '.\n"
         " -eventdelay ms      : Set default delay for mouse and keyboard simulation to ms milliseconds\n"
         " -keydelay ms        : Set default delay for keyboard simulation to ms milliseconds\n"
         " -mousedelay ms      : Set default delay for mouse simulation to ms milliseconds\n"
         " -maxwarnings n      : Sets the maximum amount of messages to output.\n"
         "                       0 means unlimited, default: 2000\n"
         " -nocrashhandler     : Disables the crash handler. Useful for debugging crashes.\n"
         "\n"
         " Benchmarking options:\n"
#if QT_CONFIG(valgrind)
         " -callgrind          : Use callgrind to time benchmarks\n"
#endif
#ifdef QTESTLIB_USE_PERF_EVENTS
         " -perf               : Use Linux perf events to time benchmarks\n"
         " -perfcounter name   : Use the counter named 'name'\n"
         " -perfcounterlist    : Lists the counters available\n"
#endif
#ifdef HAVE_TICK_COUNTER
         " -tickcounter        : Use CPU tick counters to time benchmarks\n"
#endif
         " -eventcounter       : Counts events received during benchmarks\n"
         " -minimumvalue n     : Sets the minimum acceptable measurement value\n"
         " -minimumtotal n     : Sets the minimum acceptable total for repeated executions of a test function\n"
         " -iterations  n      : Sets the number of accumulation iterations.\n"
         " -median  n          : Sets the number of median iterations.\n"
         " -vb                 : Print out verbose benchmarking information.\n";

    for (int i = 1; i < argc; ++i) {
        if (strcmp(argv[i], "-help") == 0 || strcmp(argv[i], "--help") == 0
            || strcmp(argv[i], "/?") == 0) {
            printf(" Usage: %s [options] [testfunction[:testdata]]...\n"
                   "    By default, all testfunctions will be run.\n\n"
                   "%s", argv[0], testOptions);

            if (qml) {
                printf("\n"
                       " QmlTest options:\n"
                       " -import dir         : Specify an import directory.\n"
                       " -plugins dir        : Specify a directory where to search for plugins.\n"
                       " -input dir/file     : Specify the root directory for test cases or a single test case file.\n"
                       " -translation file   : Specify the translation file.\n"
                       " -file-selector dir  : Specify a file selector for the QML engine.\n"
                       );
            }

            printf("\n"
                   " -help               : This help\n");
            exit(0);
        } else if (strcmp(argv[i], "-functions") == 0) {
            if (qml) {
                QTest::printAvailableFunctions = true;
            } else {
                qPrintTestSlots(stdout);
                exit(0);
            }
        } else if (strcmp(argv[i], "-datatags") == 0) {
            if (!qml) {
                qPrintDataTags(stdout);
                exit(0);
            }
        } else if (strcmp(argv[i], "-txt") == 0) {
            logFormat = QTestLog::Plain;
        } else if (strcmp(argv[i], "-csv") == 0) {
            logFormat = QTestLog::CSV;
        } else if (strcmp(argv[i], "-junitxml") == 0)  {
            logFormat = QTestLog::JUnitXML;
        } else if (strcmp(argv[i], "-xunitxml") == 0)  {
            fprintf(stderr, "WARNING: xunitxml is deprecated. Please use junitxml.\n");
            logFormat = QTestLog::JUnitXML;
        } else if (strcmp(argv[i], "-xml") == 0) {
            logFormat = QTestLog::XML;
        } else if (strcmp(argv[i], "-lightxml") == 0) {
            logFormat = QTestLog::LightXML;
        } else if (strcmp(argv[i], "-teamcity") == 0) {
            logFormat = QTestLog::TeamCity;
        } else if (strcmp(argv[i], "-tap") == 0) {
            logFormat = QTestLog::TAP;
        } else if (strcmp(argv[i], "-silent") == 0) {
            QTestLog::setVerboseLevel(-1);
        } else if (strcmp(argv[i], "-v1") == 0) {
            QTestLog::setVerboseLevel(1);
        } else if (strcmp(argv[i], "-v2") == 0) {
            QTestLog::setVerboseLevel(2);
        } else if (strcmp(argv[i], "-vs") == 0) {
            QSignalDumper::setEnabled(true);
        } else if (strcmp(argv[i], "-o") == 0) {
            if (i + 1 >= argc) {
                fprintf(stderr, "-o needs an extra parameter specifying the filename and optional format\n");
                exit(1);
            }
            ++i;
            // Do we have the old or new style -o option?
            char *filename = new char[strlen(argv[i])+1];
            char *format = new char[strlen(argv[i])+1];
            if (sscanf(argv[i], "%[^,],%s", filename, format) == 1) {
                // Old-style
                logFilename = argv[i];
            } else {
                // New-style
                if (strcmp(format, "txt") == 0)
                    logFormat = QTestLog::Plain;
                else if (strcmp(format, "csv") == 0)
                    logFormat = QTestLog::CSV;
                else if (strcmp(format, "lightxml") == 0)
                    logFormat = QTestLog::LightXML;
                else if (strcmp(format, "xml") == 0)
                    logFormat = QTestLog::XML;
                else if (strcmp(format, "junitxml") == 0)
                    logFormat = QTestLog::JUnitXML;
                else if (strcmp(format, "xunitxml") == 0) {
                    fprintf(stderr, "WARNING: xunitxml is deprecated. Please use junitxml.\n");
                    logFormat = QTestLog::JUnitXML;
                } else if (strcmp(format, "teamcity") == 0)
                    logFormat = QTestLog::TeamCity;
                else if (strcmp(format, "tap") == 0)
                    logFormat = QTestLog::TAP;
                else {
                    fprintf(stderr, "output format must be one of txt, csv, lightxml, xml, tap, teamcity or junitxml\n");
                    exit(1);
                }
                if (strcmp(filename, "-") == 0 && QTestLog::loggerUsingStdout()) {
                    fprintf(stderr, "only one logger can log to stdout\n");
                    exit(1);
                }
                QTestLog::addLogger(QTestLog::LogMode(logFormat), filename);
            }
            delete [] filename;
            delete [] format;
        } else if (strcmp(argv[i], "-eventdelay") == 0) {
            if (i + 1 >= argc) {
                fprintf(stderr, "-eventdelay needs an extra parameter to indicate the delay(ms)\n");
                exit(1);
            } else {
                QTest::eventDelay = qToInt(argv[++i]);
            }
        } else if (strcmp(argv[i], "-keydelay") == 0) {
            if (i + 1 >= argc) {
                fprintf(stderr, "-keydelay needs an extra parameter to indicate the delay(ms)\n");
                exit(1);
            } else {
                QTest::keyDelay = qToInt(argv[++i]);
            }
        } else if (strcmp(argv[i], "-mousedelay") == 0) {
            if (i + 1 >= argc) {
                fprintf(stderr, "-mousedelay needs an extra parameter to indicate the delay(ms)\n");
                exit(1);
            } else {
                QTest::mouseDelay = qToInt(argv[++i]);
            }
        } else if (strcmp(argv[i], "-maxwarnings") == 0) {
            if (i + 1 >= argc) {
                fprintf(stderr, "-maxwarnings needs an extra parameter with the amount of warnings\n");
                exit(1);
            } else {
                QTestLog::setMaxWarnings(qToInt(argv[++i]));
            }
        } else if (strcmp(argv[i], "-nocrashhandler") == 0) {
            QTest::noCrashHandler = true;
#if QT_CONFIG(valgrind)
        } else if (strcmp(argv[i], "-callgrind") == 0) {
            if (!QBenchmarkValgrindUtils::haveValgrind()) {
                fprintf(stderr,
                        "WARNING: Valgrind not found or too old. "
                        "Make sure it is installed and in your path. "
                        "Using the walltime measurer.\n");
            } else if (QFileInfo(QDir::currentPath()).isWritable()) {
                QBenchmarkGlobalData::current->setMode(
                    QBenchmarkGlobalData::CallgrindParentProcess);
            } else {
                fprintf(stderr,
                        "WARNING: Current directory not writable. "
                        "Using the walltime measurer.\n");
            }
        } else if (strcmp(argv[i], "-callgrindchild") == 0) { // "private" option
            QBenchmarkGlobalData::current->setMode(QBenchmarkGlobalData::CallgrindChildProcess);
            QBenchmarkGlobalData::current->callgrindOutFileBase =
                QBenchmarkValgrindUtils::outFileBase();
#endif
#ifdef QTESTLIB_USE_PERF_EVENTS
        } else if (strcmp(argv[i], "-perf") == 0) {
            if (QBenchmarkPerfEventsMeasurer::isAvailable()) {
                // perf available
                QBenchmarkGlobalData::current->setMode(QBenchmarkGlobalData::PerfCounter);
            } else {
                fprintf(stderr, "WARNING: Linux perf events not available. Using the walltime measurer.\n");
            }
        } else if (strcmp(argv[i], "-perfcounter") == 0) {
            if (i + 1 >= argc) {
                fprintf(stderr, "-perfcounter needs an extra parameter with the name of the counter\n");
                exit(1);
            } else {
                QBenchmarkPerfEventsMeasurer::setCounter(argv[++i]);
            }
        } else if (strcmp(argv[i], "-perfcounterlist") == 0) {
            QBenchmarkPerfEventsMeasurer::listCounters();
            exit(0);
#endif
#ifdef HAVE_TICK_COUNTER
        } else if (strcmp(argv[i], "-tickcounter") == 0) {
            QBenchmarkGlobalData::current->setMode(QBenchmarkGlobalData::TickCounter);
#endif
        } else if (strcmp(argv[i], "-eventcounter") == 0) {
            QBenchmarkGlobalData::current->setMode(QBenchmarkGlobalData::EventCounter);
        } else if (strcmp(argv[i], "-minimumvalue") == 0) {
            if (i + 1 >= argc) {
                fprintf(stderr, "-minimumvalue needs an extra parameter to indicate the minimum time(ms)\n");
                exit(1);
            } else {
                QBenchmarkGlobalData::current->walltimeMinimum = qToInt(argv[++i]);
            }
        } else if (strcmp(argv[i], "-minimumtotal") == 0) {
            if (i + 1 >= argc) {
                fprintf(stderr, "-minimumtotal needs an extra parameter to indicate the minimum total measurement\n");
                exit(1);
            } else {
                QBenchmarkGlobalData::current->minimumTotal = qToInt(argv[++i]);
            }
        } else if (strcmp(argv[i], "-iterations") == 0) {
            if (i + 1 >= argc) {
                fprintf(stderr, "-iterations needs an extra parameter to indicate the number of iterations\n");
                exit(1);
            } else {
                QBenchmarkGlobalData::current->iterationCount = qToInt(argv[++i]);
            }
        } else if (strcmp(argv[i], "-median") == 0) {
            if (i + 1 >= argc) {
                fprintf(stderr, "-median needs an extra parameter to indicate the number of median iterations\n");
                exit(1);
            } else {
                QBenchmarkGlobalData::current->medianIterationCount = qToInt(argv[++i]);
            }

        } else if (strcmp(argv[i], "-vb") == 0) {
            QBenchmarkGlobalData::current->verboseOutput = true;
#if defined(Q_OS_DARWIN)
        } else if (strncmp(argv[i], "-Apple", 6) == 0) {
            i += 1; // Skip Apple-specific user preferences
            continue;
# if defined(HAVE_XCTEST)
        } else if (int skip = QXcodeTestLogger::parseCommandLineArgument(argv[i])) {
            i += (skip - 1); // Eating argv[i] with a continue counts towards skips
            continue;
# endif
#endif
        } else if (argv[i][0] == '-') {
            fprintf(stderr, "Unknown option: '%s'\n\n%s", argv[i], testOptions);
            if (qml) {
                fprintf(stderr, "\nqmltest related options:\n"
                                " -import    : Specify an import directory.\n"
                                " -plugins   : Specify a directory where to search for plugins.\n"
                                " -input     : Specify the root directory for test cases.\n"
                       );
            }

            fprintf(stderr, "\n"
                            " -help      : This help\n");
            exit(1);
        } else {
            // We can't check the availability of test functions until
            // we load the QML files.  So just store the data for now.
            int colon = -1;
            int offset;
            for (offset = 0; argv[i][offset]; ++offset) {
                if (argv[i][offset] == ':') {
                    if (argv[i][offset + 1] == ':') {
                        // "::" is used as a test name separator.
                        // e.g. "ClickTests::test_click:row1".
                        ++offset;
                    } else {
                        colon = offset;
                        break;
                    }
                }
            }
            if (colon == -1) {
                QTest::testFunctions += QString::fromLatin1(argv[i]);
                QTest::testTags += QString();
            } else {
                QTest::testFunctions +=
                    QString::fromLatin1(argv[i], colon);
                QTest::testTags +=
                    QString::fromLatin1(argv[i] + colon + 1);
            }
        }
    }

    bool installedTestCoverage = installCoverageTool(QTestResult::currentAppName(), QTestResult::currentTestObjectName());
    QTestLog::setInstalledTestCoverage(installedTestCoverage);

    // If no loggers were created by the long version of the -o command-line
    // option, but a logger was requested via the old-style option, add it.
    const bool explicitLoggerRequested = logFormat != -1;
    if (!QTestLog::hasLoggers() && explicitLoggerRequested)
        QTestLog::addLogger(QTestLog::LogMode(logFormat), logFilename);

    bool addFallbackLogger = !explicitLoggerRequested;

#if defined(QT_USE_APPLE_UNIFIED_LOGGING)
    // Any explicitly requested loggers will be added by now, so we can check if they use stdout
    const bool safeToAddAppleLogger = !AppleUnifiedLogger::willMirrorToStderr() || !QTestLog::loggerUsingStdout();
    if (safeToAddAppleLogger && QAppleTestLogger::debugLoggingEnabled()) {
        QTestLog::addLogger(QTestLog::Apple, nullptr);
        if (AppleUnifiedLogger::willMirrorToStderr() && !logFilename)
            addFallbackLogger = false; // Prevent plain test logger fallback below
    }
#endif

    if (addFallbackLogger)
        QTestLog::addLogger(QTestLog::Plain, logFilename);
}

// Temporary, backwards compatibility, until qtdeclarative's use of it is converted
Q_TESTLIB_EXPORT void qtest_qParseArgs(int argc, char *argv[], bool qml) {
    qtest_qParseArgs(argc, const_cast<const char *const *>(argv), qml);
}

QBenchmarkResult qMedian(const QList<QBenchmarkResult> &container)
{
    const int count = container.size();
    if (count == 0)
        return QBenchmarkResult();

    if (count == 1)
        return container.front();

    QList<QBenchmarkResult> containerCopy = container;
    std::sort(containerCopy.begin(), containerCopy.end());

    const int middle = count / 2;

    // ### handle even-sized containers here by doing an arithmetic mean of the two middle items.
    return containerCopy.at(middle);
}

struct QTestDataSetter
{
    QTestDataSetter(QTestData *data)
    {
        QTestResult::setCurrentTestData(data);
    }
    ~QTestDataSetter()
    {
        QTestResult::setCurrentTestData(nullptr);
    }
};

namespace {

qreal addResult(qreal current, const QBenchmarkResult& r)
{
    return current + r.value;
}

}

void TestMethods::invokeTestOnData(int index) const
{
    /* Benchmarking: for each median iteration*/

    bool isBenchmark = false;
    int i = (QBenchmarkGlobalData::current->measurer->needsWarmupIteration()) ? -1 : 0;

    QList<QBenchmarkResult> results;
    bool minimumTotalReached = false;
    do {
        QBenchmarkTestMethodData::current->beginDataRun();

        /* Benchmarking: for each accumulation iteration*/
        bool invokeOk;
        do {
            QTest::inTestFunction = true;
            if (m_initMethod.isValid())
                m_initMethod.invoke(QTest::currentTestObject, Qt::DirectConnection);

            const bool initQuit =
                QTestResult::skipCurrentTest() || QTestResult::currentTestFailed();
            if (!initQuit) {
                QBenchmarkTestMethodData::current->result = QBenchmarkResult();
                QBenchmarkTestMethodData::current->resultAccepted = false;

                QBenchmarkGlobalData::current->context.tag = QLatin1StringView(
                    QTestResult::currentDataTag() ? QTestResult::currentDataTag() : "");

                invokeOk = m_methods[index].invoke(QTest::currentTestObject, Qt::DirectConnection);
                if (!invokeOk)
                    QTestResult::addFailure("Unable to execute slot", __FILE__, __LINE__);

                isBenchmark = QBenchmarkTestMethodData::current->isBenchmark();
            } else {
                invokeOk = false;
            }

            QTest::inTestFunction = false;
            QTestResult::finishedCurrentTestData();

            if (!initQuit) {
                if (m_cleanupMethod.isValid())
                    m_cleanupMethod.invoke(QTest::currentTestObject, Qt::DirectConnection);

                // Process any deleteLater(), used by event-loop-based apps.
                // Fixes memleak reports.
                if (QCoreApplication::instance())
                    QCoreApplication::sendPostedEvents(nullptr, QEvent::DeferredDelete);
            }
            // If the test isn't a benchmark, finalize the result after
            // cleanup() has finished (or init has lead us to skip the test).
            if (!isBenchmark)
                QTestResult::finishedCurrentTestDataCleanup();

            // If this test method has a benchmark, repeat until all measurements are
            // acceptable.
            // The QBENCHMARK macro increases the number of iterations for each run until
            // this happens.
        } while (invokeOk && isBenchmark
                 && QBenchmarkTestMethodData::current->resultsAccepted() == false
                 && !QTestResult::skipCurrentTest() && !QTestResult::currentTestFailed());

        QBenchmarkTestMethodData::current->endDataRun();
        if (!QTestResult::skipCurrentTest() && !QTestResult::currentTestFailed()) {
            if (i > -1)  // iteration -1 is the warmup iteration.
                results.append(QBenchmarkTestMethodData::current->result);

            if (isBenchmark && QBenchmarkGlobalData::current->verboseOutput) {
                if (i == -1) {
                    QTestLog::info(qPrintable(
                        QString::fromLatin1("warmup stage result      : %1")
                            .arg(QBenchmarkTestMethodData::current->result.value)), nullptr, 0);
                } else {
                    QTestLog::info(qPrintable(
                        QString::fromLatin1("accumulation stage result: %1")
                            .arg(QBenchmarkTestMethodData::current->result.value)), nullptr, 0);
                }
            }
        }

        // Verify if the minimum total measurement is reached, if it was specified:
        if (QBenchmarkGlobalData::current->minimumTotal == -1) {
            minimumTotalReached = true;
        } else {
            const qreal total = std::accumulate(results.begin(), results.end(), 0.0, addResult);
            minimumTotalReached = (total >= QBenchmarkGlobalData::current->minimumTotal);
        }
    } while (isBenchmark
             && ((++i < QBenchmarkGlobalData::current->adjustMedianIterationCount()) || !minimumTotalReached)
             && !QTestResult::skipCurrentTest() && !QTestResult::currentTestFailed());

    // If the test is a benchmark, finalize the result after all iterations have finished.
    if (isBenchmark) {
        bool testPassed = !QTestResult::skipCurrentTest() && !QTestResult::currentTestFailed();
        QTestResult::finishedCurrentTestDataCleanup();
        // Only report benchmark figures if the test passed
        if (testPassed && QBenchmarkTestMethodData::current->resultsAccepted())
            QTestLog::addBenchmarkResult(qMedian(results));
    }
}

#if QT_CONFIG(thread)

class WatchDog : public QThread
{
    enum Expectation {
        ThreadStart,
        TestFunctionStart,
        TestFunctionEnd,
        ThreadEnd,
    };

    bool waitFor(std::unique_lock<QtPrivate::mutex> &m, Expectation e)
    {
        auto expectationChanged = [this, e] { return expecting.load(std::memory_order_relaxed) != e; };
        switch (e) {
        case TestFunctionEnd:
            return waitCondition.wait_for(m, defaultTimeout(), expectationChanged);
        case ThreadStart:
        case ThreadEnd:
        case TestFunctionStart:
            waitCondition.wait(m, expectationChanged);
            return true;
        }
        Q_UNREACHABLE();
        return false;
    }

public:
    WatchDog()
    {
        setObjectName("QtTest Watchdog"_L1);
        auto locker = qt_unique_lock(mutex);
        expecting.store(ThreadStart, std::memory_order_relaxed);
        start();
        waitFor(locker, ThreadStart);
    }

    ~WatchDog()
    {
        {
            const auto locker = qt_scoped_lock(mutex);
            expecting.store(ThreadEnd, std::memory_order_relaxed);
            waitCondition.notify_all();
        }
        wait();
    }

    void beginTest()
    {
        const auto locker = qt_scoped_lock(mutex);
        expecting.store(TestFunctionEnd, std::memory_order_relaxed);
        waitCondition.notify_all();
    }

    void testFinished()
    {
        const auto locker = qt_scoped_lock(mutex);
        expecting.store(TestFunctionStart, std::memory_order_relaxed);
        waitCondition.notify_all();
    }

    void run() override
    {
        auto locker = qt_unique_lock(mutex);
        expecting.store(TestFunctionStart, std::memory_order_release);
        waitCondition.notify_all();
        while (true) {
            Expectation e = expecting.load(std::memory_order_acquire);
            switch (e) {
            case ThreadEnd:
                return;
            case ThreadStart:
                Q_UNREACHABLE();
            case TestFunctionStart:
            case TestFunctionEnd:
                if (Q_UNLIKELY(!waitFor(locker, e))) {
                    fflush(stderr);
                    printTestRunTime();
                    generateStackTrace();
                    qFatal("Test function timed out");
                }
            }
        }
    }

private:
    QtPrivate::mutex mutex;
    QtPrivate::condition_variable waitCondition;
    std::atomic<Expectation> expecting;
};

#else // !QT_CONFIG(thread)

class WatchDog : public QObject
{
public:
    void beginTest() {};
    void testFinished() {};
};

#endif  // QT_CONFIG(thread)


static void printUnknownDataTagError(QLatin1StringView name, QLatin1StringView tag,
                                     const QTestTable &lTable, const QTestTable &gTable)
{
    fprintf(stderr, "Unknown testdata for function %s(): '%s'\n", name.constData(), tag.data());
    const int localDataCount = lTable.dataCount();
    if (localDataCount) {
        fputs("Available test-specific data tags:\n", stderr);
        for (int i = 0; i < localDataCount; ++i)
            fprintf(stderr, "\t%s\n", lTable.testData(i)->dataTag());
    }
    const int globalDataCount = gTable.dataCount();
    if (globalDataCount) {
        fputs("Available global data tags:\n", stderr);
        for (int i = 0; i < globalDataCount; ++i)
            fprintf(stderr, "\t%s\n", gTable.testData(i)->dataTag());
    }
    if (localDataCount == 0 && globalDataCount == 0)
        fputs("Function has no data tags\n", stderr);
}

/*!
    \internal

    Call slot_data(), init(), slot(), cleanup(), init(), slot(), cleanup(), ...
    If data is set then it is the only test that is performed

    If the function was successfully called, true is returned, otherwise
    false.
*/
bool TestMethods::invokeTest(int index, QLatin1StringView tag, WatchDog *watchDog) const
{
    QBenchmarkTestMethodData benchmarkData;
    QBenchmarkTestMethodData::current = &benchmarkData;

    const QByteArray &name = m_methods[index].name();
    QBenchmarkGlobalData::current->context.slotName = QLatin1StringView(name) + "()"_L1;

    char member[512];
    QTestTable table;

    QTestResult::setCurrentTestFunction(name.constData());

    const QTestTable *gTable = QTestTable::globalTestTable();
    const int globalDataCount = gTable->dataCount();
    int curGlobalDataIndex = 0;
    const auto globalDataTag = [gTable, globalDataCount](int index) {
        return globalDataCount ? gTable->testData(index)->dataTag() : nullptr;
    };

    const auto dataTagMatches = [](QLatin1StringView tag, QLatin1StringView local,
                                   QLatin1StringView global) {
        if (tag.isEmpty()) // No tag specified => run all data sets for this function
            return true;
        if (tag == local || tag == global) // Equal to either => run it
            return true;
        // Also allow global:local as a match:
        return tag.startsWith(global) && tag.endsWith(local) &&
               tag.size() == global.size() + 1 + local.size() &&
               tag[global.size()] == ':';
    };
    bool foundFunction = false;

    /* For each entry in the global data table, do: */
    do {
        if (!gTable->isEmpty())
            QTestResult::setCurrentGlobalTestData(gTable->testData(curGlobalDataIndex));

        if (curGlobalDataIndex == 0) {
            qsnprintf(member, 512, "%s_data()", name.constData());
            invokeMethod(QTest::currentTestObject, member);
            if (QTestResult::skipCurrentTest())
                break;
        }

        int curDataIndex = 0;
        const int dataCount = table.dataCount();
        const auto dataTag = [&table, dataCount](int index) {
            return dataCount ? table.testData(index)->dataTag() : nullptr;
        };

        /* For each entry in this test's data table, do: */
        do {
            QTestResult::setSkipCurrentTest(false);
            QTestResult::setBlacklistCurrentTest(false);
            if (dataTagMatches(tag, QLatin1StringView(dataTag(curDataIndex)),
                               QLatin1StringView(globalDataTag(curGlobalDataIndex)))) {
                foundFunction = true;
                QTestPrivate::checkBlackLists(name.constData(), dataTag(curDataIndex),
                                              globalDataTag(curGlobalDataIndex));

                QTestDataSetter s(curDataIndex >= dataCount ? nullptr : table.testData(curDataIndex));

                QTestPrivate::qtestMouseButtons = Qt::NoButton;
                if (watchDog)
                    watchDog->beginTest();
                QTest::lastMouseTimestamp += 500;   // Maintain at least 500ms mouse event timestamps between each test function call
                invokeTestOnData(index);
                if (watchDog)
                    watchDog->testFinished();

                if (!tag.isEmpty() && !globalDataCount)
                    break;
            }
            ++curDataIndex;
        } while (curDataIndex < dataCount);

        QTestResult::setCurrentGlobalTestData(nullptr);
        ++curGlobalDataIndex;
    } while (curGlobalDataIndex < globalDataCount);

    if (!tag.isEmpty() && !foundFunction) {
        printUnknownDataTagError(QLatin1StringView(name), tag, table, *gTable);
        QTestResult::addFailure(qPrintable("Data tag not found: %1"_L1.arg(tag)));
    }
    QTestResult::finishedCurrentTestFunction();
    QTestResult::setSkipCurrentTest(false);
    QTestResult::setBlacklistCurrentTest(false);

    return true;
}

void *fetchData(QTestData *data, const char *tagName, int typeId)
{
    QTEST_ASSERT(typeId);
    QTEST_ASSERT_X(data, "QTest::fetchData()", "Test data requested, but no testdata available.");
    QTEST_ASSERT(data->parent());

    int idx = data->parent()->indexOf(tagName);

    if (Q_UNLIKELY(idx == -1 || idx >= data->dataCount())) {
        qFatal("QFETCH: Requested testdata '%s' not available, check your _data function.",
                tagName);
    }

    if (Q_UNLIKELY(typeId != data->parent()->elementTypeId(idx))) {
        qFatal("Requested type '%s' does not match available type '%s'.",
               QMetaType(typeId).name(),
               QMetaType(data->parent()->elementTypeId(idx)).name());
    }

    return data->data(idx);
}

/*!
 * \internal
*/
char *formatString(const char *prefix, const char *suffix, size_t numArguments, ...)
{
    va_list ap;
    va_start(ap, numArguments);

    QByteArray arguments;
    arguments += prefix;

    if (numArguments > 0) {
        arguments += va_arg(ap, const char *);

        for (size_t i = 1; i < numArguments; ++i) {
            arguments += ", ";
            arguments += va_arg(ap, const char *);
        }
    }

    va_end(ap);
    arguments += suffix;
    return qstrdup(arguments.constData());
}

/*!
  Returns a pointer to a string that is the string \a ba represented
  as a space-separated sequence of hex characters. If the input is
  considered too long, it is truncated. A trucation is indicated in
  the returned string as an ellipsis at the end. The caller has
  ownership of the returned pointer and must ensure it is later passed
  to operator delete[].

  \a length is the length of the string \a ba.
*/
char *toHexRepresentation(const char *ba, qsizetype length)
{
    if (length == 0)
        return qstrdup("");

    /* We output at maximum about maxLen characters in order to avoid
     * running out of memory and flooding things when the byte array
     * is large.
     *
     * maxLen can't be for example 200 because Qt Test is sprinkled with fixed
     * size char arrays.
     * */
    const qsizetype maxLen = 50;
    const qsizetype len = qMin(maxLen, length);
    char *result = nullptr;

    if (length > maxLen) {
        const qsizetype size = len * 3 + 4;
        result = new char[size];

        char *const forElipsis = result + size - 5;
        forElipsis[0] = ' ';
        forElipsis[1] = '.';
        forElipsis[2] = '.';
        forElipsis[3] = '.';
        result[size - 1] = '\0';
    }
    else {
        const qsizetype size = len * 3;
        result = new char[size];
        result[size - 1] = '\0';
    }

    qsizetype i = 0;
    qsizetype o = 0;

    while (true) {
        const char at = ba[i];

        result[o] = toHexUpper(at >> 4);
        ++o;
        result[o] = toHexUpper(at);

        ++i;
        ++o;
        if (i == len)
            break;
        result[o] = ' ';
        ++o;
    }

    return result;
}

/*!
    \internal
    Returns the same QByteArray but with only the ASCII characters still shown;
    everything else is replaced with \c {\xHH}.
*/
char *toPrettyCString(const char *p, qsizetype length)
{
    bool trimmed = false;
    auto buffer = std::make_unique<char[]>(256);
    const char *end = p + length;
    char *dst = buffer.get();

    bool lastWasHexEscape = false;
    *dst++ = '"';
    for ( ; p != end; ++p) {
        // we can add:
        //  1 byte: a single character
        //  2 bytes: a simple escape sequence (\n)
        //  3 bytes: "" and a character
        //  4 bytes: an hex escape sequence (\xHH)
        if (dst - buffer.get() > 246) {
            // plus the quote, the three dots and NUL, it's 255 in the worst case
            trimmed = true;
            break;
        }

        // check if we need to insert "" to break an hex escape sequence
        if (Q_UNLIKELY(lastWasHexEscape)) {
            if (fromHex(*p) != -1) {
                // yes, insert it
                *dst++ = '"';
                *dst++ = '"';
            }
            lastWasHexEscape = false;
        }

        if (*p < 0x7f && *p >= 0x20 && *p != '\\' && *p != '"') {
            *dst++ = *p;
            continue;
        }

        // write as an escape sequence
        // this means we may advance dst to buffer.data() + 247 or 250
        *dst++ = '\\';
        switch (*p) {
        case 0x5c:
        case 0x22:
            *dst++ = uchar(*p);
            break;
        case 0x8:
            *dst++ = 'b';
            break;
        case 0xc:
            *dst++ = 'f';
            break;
        case 0xa:
            *dst++ = 'n';
            break;
        case 0xd:
            *dst++ = 'r';
            break;
        case 0x9:
            *dst++ = 't';
            break;
        default:
            // print as hex escape
            *dst++ = 'x';
            *dst++ = toHexUpper(uchar(*p) >> 4);
            *dst++ = toHexUpper(uchar(*p));
            lastWasHexEscape = true;
            break;
        }
    }

    *dst++ = '"';
    if (trimmed) {
        *dst++ = '.';
        *dst++ = '.';
        *dst++ = '.';
    }
    *dst++ = '\0';
    return buffer.release();
}

/*!
    \internal
    Returns the same QString but with only the ASCII characters still shown;
    everything else is replaced with \c {\uXXXX}.

    Similar to QDebug::putString().
*/
char *toPrettyUnicode(QStringView string)
{
    auto p = string.utf16();
    auto length = string.size();
    // keep it simple for the vast majority of cases
    bool trimmed = false;
    auto buffer = std::make_unique<char[]>(256);
    const auto end = p + length;
    char *dst = buffer.get();

    *dst++ = '"';
    for ( ; p != end; ++p) {
        if (dst - buffer.get() > 245) {
            // plus the quote, the three dots and NUL, it's 250, 251 or 255
            trimmed = true;
            break;
        }

        if (*p < 0x7f && *p >= 0x20 && *p != '\\' && *p != '"') {
            *dst++ = *p;
            continue;
        }

        // write as an escape sequence
        // this means we may advance dst to buffer.data() + 246 or 250
        *dst++ = '\\';
        switch (*p) {
        case 0x22:
        case 0x5c:
            *dst++ = uchar(*p);
            break;
        case 0x8:
            *dst++ = 'b';
            break;
        case 0xc:
            *dst++ = 'f';
            break;
        case 0xa:
            *dst++ = 'n';
            break;
        case 0xd:
            *dst++ = 'r';
            break;
        case 0x9:
            *dst++ = 't';
            break;
        default:
            *dst++ = 'u';
            *dst++ = toHexUpper(*p >> 12);
            *dst++ = toHexUpper(*p >> 8);
            *dst++ = toHexUpper(*p >> 4);
            *dst++ = toHexUpper(*p);
        }
    }

    *dst++ = '"';
    if (trimmed) {
        *dst++ = '.';
        *dst++ = '.';
        *dst++ = '.';
    }
    *dst++ = '\0';
    return buffer.release();
}

void TestMethods::invokeTests(QObject *testObject) const
{
    const QMetaObject *metaObject = testObject->metaObject();
    QTEST_ASSERT(metaObject);
    QTestResult::setCurrentTestFunction("initTestCase");
    if (m_initTestCaseDataMethod.isValid())
        m_initTestCaseDataMethod.invoke(testObject, Qt::DirectConnection);

    QScopedPointer<WatchDog> watchDog;
    if (!alreadyDebugging()
#if QT_CONFIG(valgrind)
        && QBenchmarkGlobalData::current->mode() != QBenchmarkGlobalData::CallgrindChildProcess
#endif
       ) {
        watchDog.reset(new WatchDog);
    }

    QSignalDumper::startDump();

    if (!QTestResult::skipCurrentTest() && !QTestResult::currentTestFailed()) {
        if (m_initTestCaseMethod.isValid())
            m_initTestCaseMethod.invoke(testObject, Qt::DirectConnection);

        // finishedCurrentTestDataCleanup() resets QTestResult::currentTestFailed(), so use a local copy.
        const bool previousFailed = QTestResult::currentTestFailed();
        QTestResult::finishedCurrentTestData();
        QTestResult::finishedCurrentTestDataCleanup();
        QTestResult::finishedCurrentTestFunction();

        if (!QTestResult::skipCurrentTest() && !previousFailed) {
            for (int i = 0, count = int(m_methods.size()); i < count; ++i) {
                const char *data = nullptr;
                if (i < QTest::testTags.size() && !QTest::testTags.at(i).isEmpty())
                    data = qstrdup(QTest::testTags.at(i).toLatin1().constData());
                const bool ok = invokeTest(i, QLatin1StringView(data), watchDog.data());
                delete [] data;
                if (!ok)
                    break;
            }
        }

        const bool wasSkipped = QTestResult::skipCurrentTest();
        QTestResult::setSkipCurrentTest(false);
        QTestResult::setBlacklistCurrentTest(false);
        QTestResult::setCurrentTestFunction("cleanupTestCase");
        if (m_cleanupTestCaseMethod.isValid())
            m_cleanupTestCaseMethod.invoke(testObject, Qt::DirectConnection);
        QTestResult::finishedCurrentTestData();
        // Restore skip state as it affects decision on whether we passed:
        QTestResult::setSkipCurrentTest(wasSkipped || QTestResult::skipCurrentTest());
        QTestResult::finishedCurrentTestDataCleanup();
    }
    QTestResult::finishedCurrentTestFunction();
    QTestResult::setCurrentTestFunction(nullptr);

    QSignalDumper::endDump();
}

bool reportResult(bool success, qxp::function_ref<const char *()> lhs,
                  qxp::function_ref<const char *()> rhs,
                  const char *lhsExpr, const char *rhsExpr,
                  ComparisonOperation op, const char *file, int line)
{
    return QTestResult::reportResult(success, lhs, rhs, lhsExpr, rhsExpr, op, file, line);
}

} // namespace QTest

namespace {
#if defined(Q_OS_WIN)

// Helper class for resolving symbol names by dynamically loading "dbghelp.dll".
class DebugSymbolResolver
{
    Q_DISABLE_COPY_MOVE(DebugSymbolResolver)
public:
    struct Symbol {
        Symbol() : name(nullptr), address(0) {}

        const char *name; // Must be freed by caller.
        DWORD64 address;
    };

    explicit DebugSymbolResolver(HANDLE process);
    ~DebugSymbolResolver() { cleanup(); }

    bool isValid() const { return m_symFromAddr; }

    Symbol resolveSymbol(DWORD64 address) const;

private:
    // typedefs from DbgHelp.h/.dll
    struct DBGHELP_SYMBOL_INFO { // SYMBOL_INFO
        ULONG       SizeOfStruct;
        ULONG       TypeIndex;        // Type Index of symbol
        ULONG64     Reserved[2];
        ULONG       Index;
        ULONG       Size;
        ULONG64     ModBase;          // Base Address of module comtaining this symbol
        ULONG       Flags;
        ULONG64     Value;            // Value of symbol, ValuePresent should be 1
        ULONG64     Address;          // Address of symbol including base address of module
        ULONG       Register;         // register holding value or pointer to value
        ULONG       Scope;            // scope of the symbol
        ULONG       Tag;              // pdb classification
        ULONG       NameLen;          // Actual length of name
        ULONG       MaxNameLen;
        CHAR        Name[1];          // Name of symbol
    };

    typedef BOOL (__stdcall *SymInitializeType)(HANDLE, PCSTR, BOOL);
    typedef BOOL (__stdcall *SymFromAddrType)(HANDLE, DWORD64, PDWORD64, DBGHELP_SYMBOL_INFO *);

    void cleanup();

    const HANDLE m_process;
    HMODULE m_dbgHelpLib;
    SymFromAddrType m_symFromAddr;
};

void DebugSymbolResolver::cleanup()
{
    if (m_dbgHelpLib)
        FreeLibrary(m_dbgHelpLib);
    m_dbgHelpLib = 0;
    m_symFromAddr = nullptr;
}

DebugSymbolResolver::DebugSymbolResolver(HANDLE process)
    : m_process(process), m_dbgHelpLib(0), m_symFromAddr(nullptr)
{
    bool success = false;
    m_dbgHelpLib = LoadLibraryW(L"dbghelp.dll");
    if (m_dbgHelpLib) {
        SymInitializeType symInitialize = reinterpret_cast<SymInitializeType>(
            reinterpret_cast<QFunctionPointer>(GetProcAddress(m_dbgHelpLib, "SymInitialize")));
        m_symFromAddr = reinterpret_cast<SymFromAddrType>(
            reinterpret_cast<QFunctionPointer>(GetProcAddress(m_dbgHelpLib, "SymFromAddr")));
        success = symInitialize && m_symFromAddr && symInitialize(process, NULL, TRUE);
    }
    if (!success)
        cleanup();
}

DebugSymbolResolver::Symbol DebugSymbolResolver::resolveSymbol(DWORD64 address) const
{
    // reserve additional buffer where SymFromAddr() will store the name
    struct NamedSymbolInfo : public DBGHELP_SYMBOL_INFO {
        enum { symbolNameLength = 255 };

        char name[symbolNameLength + 1];
    };

    Symbol result;
    if (!isValid())
        return result;
    NamedSymbolInfo symbolBuffer;
    memset(&symbolBuffer, 0, sizeof(NamedSymbolInfo));
    symbolBuffer.MaxNameLen = NamedSymbolInfo::symbolNameLength;
    symbolBuffer.SizeOfStruct = sizeof(DBGHELP_SYMBOL_INFO);
    if (!m_symFromAddr(m_process, address, 0, &symbolBuffer))
        return result;
    result.name = qstrdup(symbolBuffer.Name);
    result.address = symbolBuffer.Address;
    return result;
}

class WindowsFaultHandler
{
public:
    WindowsFaultHandler()
    {
#  if !defined(Q_CC_MINGW)
        _CrtSetReportMode(_CRT_ERROR, _CRTDBG_MODE_DEBUG);
#  endif
        SetErrorMode(SetErrorMode(0) | SEM_NOGPFAULTERRORBOX);
        SetUnhandledExceptionFilter(windowsFaultHandler);
    }

private:
    static LONG WINAPI windowsFaultHandler(struct _EXCEPTION_POINTERS *exInfo)
    {
        enum { maxStackFrames = 100 };
        char appName[MAX_PATH];
        if (!GetModuleFileNameA(NULL, appName, MAX_PATH))
            appName[0] = 0;
        const int msecsFunctionTime = qRound(QTestLog::msecsFunctionTime());
        const int msecsTotalTime = qRound(QTestLog::msecsTotalTime());
        const void *exceptionAddress = exInfo->ExceptionRecord->ExceptionAddress;
        printf("A crash occurred in %s.\n", appName);
        if (const char *name = QTest::currentTestFunction())
            printf("While testing %s\n", name);
        printf("Function time: %dms Total time: %dms\n\n"
               "Exception address: 0x%p\n"
               "Exception code   : 0x%lx\n",
               msecsFunctionTime, msecsTotalTime, exceptionAddress,
               exInfo->ExceptionRecord->ExceptionCode);

        DebugSymbolResolver resolver(GetCurrentProcess());
        if (resolver.isValid()) {
            DebugSymbolResolver::Symbol exceptionSymbol = resolver.resolveSymbol(DWORD64(exceptionAddress));
            if (exceptionSymbol.name) {
                printf("Nearby symbol    : %s\n", exceptionSymbol.name);
                delete [] exceptionSymbol.name;
            }
            void *stack[maxStackFrames];
            fputs("\nStack:\n", stdout);
            const unsigned frameCount = CaptureStackBackTrace(0, DWORD(maxStackFrames), stack, NULL);
            for (unsigned f = 0; f < frameCount; ++f)     {
                DebugSymbolResolver::Symbol symbol = resolver.resolveSymbol(DWORD64(stack[f]));
                if (symbol.name) {
                    printf("#%3u: %s() - 0x%p\n", f + 1, symbol.name, (const void *)symbol.address);
                    delete [] symbol.name;
                } else {
                    printf("#%3u: Unable to obtain symbol\n", f + 1);
                }
            }
        }

        fputc('\n', stdout);
        fflush(stdout);

        return EXCEPTION_EXECUTE_HANDLER;
    }
};
using FatalSignalHandler = WindowsFaultHandler;

#elif defined(Q_OS_UNIX) && !defined(Q_OS_WASM)
class FatalSignalHandler
{
public:
#  define OUR_SIGNALS(F)    \
        F(HUP)              \
        F(INT)              \
        F(QUIT)             \
        F(ABRT)             \
        F(ILL)              \
        F(BUS)              \
        F(FPE)              \
        F(SEGV)             \
        F(PIPE)             \
        F(TERM)             \
        /**/
#  define CASE_LABEL(S)             case SIG ## S:  return QT_STRINGIFY(S);
#  define ENUMERATE_SIGNALS(S)      SIG ## S,
    static const char *signalName(int signum) noexcept
    {
        switch (signum) {
        OUR_SIGNALS(CASE_LABEL)
        }

#  if defined(__GLIBC_MINOR__) && (__GLIBC_MINOR__ >= 32 || __GLIBC__ > 2)
        // get the other signal names from glibc 2.32
        // (accessing the sys_sigabbrev variable causes linker warnings)
        if (const char *p = sigabbrev_np(signum))
            return p;
#  endif
        return "???";
    }
    static constexpr std::array fatalSignals = {
        OUR_SIGNALS(ENUMERATE_SIGNALS)
    };
#  undef CASE_LABEL
#  undef ENUMERATE_SIGNALS

    static constexpr std::array crashingSignals = {
        // Crash signals are special, because if we return from the handler
        // without adjusting the machine state, the same instruction that
        // originally caused the crash will get re-executed and will thus cause
        // the same crash again. This is useful if our parent process logs the
        // exit result or if core dumps are enabled: the core file will point
        // to the actual instruction that crashed.
        SIGILL, SIGBUS, SIGFPE, SIGSEGV
    };
    using OldActionsArray = std::array<struct sigaction, fatalSignals.size()>;

    FatalSignalHandler()
    {
        pauseOnCrash = qEnvironmentVariableIsSet("QTEST_PAUSE_ON_CRASH");
        struct sigaction act;
        memset(&act, 0, sizeof(act));
        act.sa_handler = SIG_DFL;
        oldActions().fill(act);

        // Remove the handler after it is invoked.
        act.sa_flags = SA_RESETHAND | setupAlternateStack();

#  ifdef SA_SIGINFO
        act.sa_flags |= SA_SIGINFO;
        act.sa_sigaction = FatalSignalHandler::actionHandler;
#  else
        act.sa_handler = FatalSignalHandler::regularHandler;
#  endif

        // Block all fatal signals in our signal handler so we don't try to close
        // the testlog twice.
        sigemptyset(&act.sa_mask);
        for (int signal : fatalSignals)
            sigaddset(&act.sa_mask, signal);

        for (size_t i = 0; i < fatalSignals.size(); ++i)
            sigaction(fatalSignals[i], &act, &oldActions()[i]);
    }

    ~FatalSignalHandler()
    {
        // Restore the default signal handlers in place of ours.
        // If ours has been replaced, leave the replacement alone.
        auto isOurs = [](const struct sigaction &old) {
#  ifdef SA_SIGINFO
            return (old.sa_flags & SA_SIGINFO) && old.sa_sigaction == FatalSignalHandler::actionHandler;
#  else
            return old.sa_handler == FatalSignalHandler::regularHandler;
#  endif
        };
        struct sigaction action;

        for (size_t i = 0; i < fatalSignals.size(); ++i) {
            struct sigaction &act = oldActions()[i];
            if (act.sa_flags == 0 && act.sa_handler == SIG_DFL)
                continue; // Already the default
            if (sigaction(fatalSignals[i], nullptr, &action))
                continue; // Failed to query present handler
            if (isOurs(action))
                sigaction(fatalSignals[i], &act, nullptr);
        }

        freeAlternateStack();
    }

private:
    Q_DISABLE_COPY_MOVE(FatalSignalHandler)

    static OldActionsArray &oldActions()
    {
        Q_CONSTINIT static OldActionsArray oldActions {};
        return oldActions;
    }

    auto alternateStackSize()
    {
        struct R { size_t size, pageSize; };
        static constexpr size_t MinStackSize = 32 * 1024;
        size_t pageSize = sysconf(_SC_PAGESIZE);
        size_t size = SIGSTKSZ;
        if (size < MinStackSize) {
            size = MinStackSize;
        } else {
            // round up to a page
            size = (size + pageSize - 1) & -pageSize;
        }

        return R{ size + pageSize, pageSize };
    }

    int setupAlternateStack()
    {
        // tvOS/watchOS both define SA_ONSTACK (in sys/signal.h) but mark sigaltstack() as
        // unavailable (__WATCHOS_PROHIBITED __TVOS_PROHIBITED in signal.h)
#  if defined(SA_ONSTACK) && !defined(Q_OS_TVOS) && !defined(Q_OS_WATCHOS)
        // Let the signal handlers use an alternate stack
        // This is necessary if SIGSEGV is to catch a stack overflow
        auto r = alternateStackSize();
        int flags = MAP_PRIVATE | MAP_ANONYMOUS;
#    ifdef MAP_STACK
        flags |= MAP_STACK;
#    endif
        alternateStackBase = mmap(nullptr, r.size, PROT_READ | PROT_WRITE, flags, -1, 0);
        if (alternateStackBase == MAP_FAILED)
            return 0;

        // mark the bottom page inaccessible, to catch a handler stack overflow
        (void) mprotect(alternateStackBase, r.pageSize, PROT_NONE);

        stack_t stack;
        stack.ss_flags = 0;
        stack.ss_size = r.size - r.pageSize;
        stack.ss_sp = static_cast<char *>(alternateStackBase) + r.pageSize;
        sigaltstack(&stack, nullptr);
        return SA_ONSTACK;
#  else
        return 0;
#  endif
    }

    void freeAlternateStack()
    {
#  if defined(SA_ONSTACK) && !defined(Q_OS_TVOS) && !defined(Q_OS_WATCHOS)
        if (alternateStackBase != MAP_FAILED) {
            stack_t stack = {};
            stack.ss_flags = SS_DISABLE;
            sigaltstack(&stack, nullptr);
            munmap(alternateStackBase, alternateStackSize().size);
        }
#  endif
    }

    template <typename T> static
    std::enable_if_t<sizeof(std::declval<T>().si_pid) + sizeof(std::declval<T>().si_uid) >= 1>
    printSentSignalInfo(T *info)
    {
        writeToStderr(" sent by PID ", asyncSafeToString(info->si_pid),
                      " UID ", asyncSafeToString(info->si_uid));
    }
    static void printSentSignalInfo(...) {}

    template <typename T> static
    std::enable_if_t<sizeof(std::declval<T>().si_addr) >= 1> printCrashingSignalInfo(T *info)
    {
        using HexString = std::array<char, sizeof(quintptr) * 2>;
        auto toHexString = [](quintptr u, HexString &&r = {}) {
            int shift = sizeof(quintptr) * 8 - 4;
            for (size_t i = 0; i < sizeof(quintptr) * 2; ++i, shift -= 4)
                r[i] = QtMiscUtils::toHexLower(u >> shift);
            struct iovec vec;
            vec.iov_base = r.data();
            vec.iov_len = r.size();
            return vec;
        };
        writeToStderr(", code ", asyncSafeToString(info->si_code),
                      ", for address 0x", toHexString(quintptr(info->si_addr)));
    }
    static void printCrashingSignalInfo(...) {}

    static void actionHandler(int signum, siginfo_t *info, void * /* ucontext */)
    {
        writeToStderr("Received signal ", asyncSafeToString(signum),
                      " (SIG", signalName(signum), ")");

        bool isCrashingSignal =
                std::find(crashingSignals.begin(), crashingSignals.end(), signum) != crashingSignals.end();
        if (isCrashingSignal && (!info || info->si_code <= 0))
            isCrashingSignal = false;       // wasn't sent by the kernel, so it's not really a crash
        if (isCrashingSignal)
            printCrashingSignalInfo(info);
        else if (info && (info->si_code == SI_USER || info->si_code == SI_QUEUE))
            printSentSignalInfo(info);

        printTestRunTime();
        if (signum != SIGINT) {
            generateStackTrace();
            if (pauseOnCrash) {
                writeToStderr("Pausing process ", asyncSafeToString(getpid()),
                       " for debugging\n");
                raise(SIGSTOP);
            }
        }

        // chain back to the previous handler, if any
        for (size_t i = 0; i < fatalSignals.size(); ++i) {
            struct sigaction &act = oldActions()[i];
            if (signum != fatalSignals[i])
                continue;

            // restore the handler (if SA_RESETHAND hasn't done the job for us)
            if (SA_RESETHAND == 0 || act.sa_handler != SIG_DFL || act.sa_flags)
                (void) sigaction(signum, &act, nullptr);

            if (!isCrashingSignal)
                raise(signum);

            // signal is blocked, so it'll be delivered when we return
            return;
        }

        // we shouldn't reach here!
        std::abort();
    }

    [[maybe_unused]] static void regularHandler(int signum)
    {
        actionHandler(signum, nullptr, nullptr);
    }

    void *alternateStackBase = MAP_FAILED;
    static bool pauseOnCrash;
};
bool FatalSignalHandler::pauseOnCrash = false;
#else // Q_OS_WASM or weird systems
class FatalSignalHandler {};
#endif // Q_OS_* choice

} // unnamed namespace

static void initEnvironment()
{
    qputenv("QT_QTESTLIB_RUNNING", "1");
}

/*!
    Executes tests declared in \a testObject. In addition, the private slots
    \c{initTestCase()}, \c{cleanupTestCase()}, \c{init()} and \c{cleanup()}
    are executed if they exist. See \l{Creating a Test} for more details.

    Optionally, the command line arguments \a argc and \a argv can be provided.
    For a list of recognized arguments, read \l {Qt Test Command Line Arguments}.

    The following example will run all tests in \c MyTestObject:

    \snippet code/src_qtestlib_qtestcase.cpp 18

    This function returns 0 if no tests failed, or a value other than 0 if one
    or more tests failed or in case of unhandled exceptions.  (Skipped tests do
    not influence the return value.)

    For stand-alone test applications, the convenience macro \l QTEST_MAIN() can
    be used to declare a main() function that parses the command line arguments
    and executes the tests, avoiding the need to call this function explicitly.

    The return value from this function is also the exit code of the test
    application when the \l QTEST_MAIN() macro is used.

    For stand-alone test applications, this function should not be called more
    than once, as command-line options for logging test output to files and
    executing individual test functions will not behave correctly.

    \note This function is not reentrant, only one test can run at a time. A
    test that was executed with qExec() can't run another test via qExec() and
    threads are not allowed to call qExec() simultaneously.

    If you have programmatically created the arguments, as opposed to getting them
    from the arguments in \c main(), it is likely of interest to use
    QTest::qExec(QObject *, const QStringList &) since it is Unicode safe.

    \sa QTEST_MAIN(), QTEST_GUILESS_MAIN(), QTEST_APPLESS_MAIN()
*/

int QTest::qExec(QObject *testObject, int argc, char **argv)
{
    // NB: QtQuick's testing recombines qInit(), qRun() and qCleanup() to
    // provide a replacement for qExec() that calls qRun() once for each
    // built-in style. So think twice about moving parts between these three
    // functions, as doing so may mess up QtQuick's testing.
    qInit(testObject, argc, argv);
    int ret = qRun();
    qCleanup();
    return ret;
}

/*! \internal
*/
void QTest::qInit(QObject *testObject, int argc, char **argv)
{
    initEnvironment();
    maybeDisableCoreDump();
    QBenchmarkGlobalData::current = new QBenchmarkGlobalData;

#if defined(Q_OS_MACOS)
    // Don't restore saved window state for auto tests
    QTestPrivate::disableWindowRestore();

    // Disable App Nap which may cause tests to stall
    QTestPrivate::AppNapDisabler appNapDisabler;

    if (qApp && (qstrcmp(qApp->metaObject()->className(), "QApplication") == 0)) {
        IOPMAssertionCreateWithName(kIOPMAssertionTypeNoDisplaySleep,
            kIOPMAssertionLevelOn, CFSTR("QtTest running tests"),
            &macPowerSavingDisabled);
    }
#endif

    QTestPrivate::parseBlackList();
    QTestResult::reset();

    QTEST_ASSERT(testObject);
    QTEST_ASSERT(!currentTestObject);
    currentTestObject = testObject;

    const QMetaObject *metaObject = testObject->metaObject();
    QTEST_ASSERT(metaObject);

    QTestResult::setCurrentTestObject(metaObject->className());
    if (argc > 0)
        QTestResult::setCurrentAppName(argv[0]);

    qtest_qParseArgs(argc, argv, false);

#if QT_CONFIG(valgrind)
    if (QBenchmarkGlobalData::current->mode() != QBenchmarkGlobalData::CallgrindParentProcess)
#endif
    {
        QTestTable::globalTestTable();
        QTestLog::startLogging();
    }
}

/*! \internal
*/
int QTest::qRun()
{
    QTEST_ASSERT(currentTestObject);

#if QT_CONFIG(valgrind)
    int callgrindChildExitCode = 0;
#endif

#ifndef QT_NO_EXCEPTIONS
    try {
#endif

#if QT_CONFIG(valgrind)
    if (QBenchmarkGlobalData::current->mode() == QBenchmarkGlobalData::CallgrindParentProcess) {
        if (Q_UNLIKELY(!qApp))
            qFatal("QtTest: -callgrind option is not available with QTEST_APPLESS_MAIN");

        const QStringList origAppArgs(QCoreApplication::arguments());
        if (!QBenchmarkValgrindUtils::rerunThroughCallgrind(origAppArgs, callgrindChildExitCode))
            return -1;

        QBenchmarkValgrindUtils::cleanup();

    } else
#endif
    {
        std::optional<FatalSignalHandler> handler;
        prepareStackTrace();
        if (!noCrashHandler)
            handler.emplace();

        bool seenBad = false;
        TestMethods::MetaMethods commandLineMethods;
        commandLineMethods.reserve(static_cast<size_t>(QTest::testFunctions.size()));
        for (const QString &tf : std::as_const(QTest::testFunctions)) {
            const QByteArray tfB = tf.toLatin1();
            const QByteArray signature = tfB + QByteArrayLiteral("()");
            QMetaMethod m = TestMethods::findMethod(currentTestObject, signature.constData());
            if (m.isValid() && isValidSlot(m)) {
                commandLineMethods.push_back(m);
            } else {
                fprintf(stderr, "Unknown test function: '%s'. Possible matches:\n",
                        tfB.constData());
                qPrintTestSlots(stderr, tfB.constData());
                QTestResult::setCurrentTestFunction(tfB.constData());
                QTestResult::addFailure(qPrintable("Function not found: %1"_L1.arg(tf)));
                QTestResult::finishedCurrentTestFunction();
                // Ditch the tag that came with tf as test function:
                QTest::testTags.remove(commandLineMethods.size());
                seenBad = true;
            }
        }
        if (seenBad) {
            // Provide relevant help to do better next time:
            fprintf(stderr, "\n%s -functions\nlists all available test functions.\n\n",
                    QTestResult::currentAppName());
            if (commandLineMethods.empty()) // All requested functions missing.
                return 1;
        }
        TestMethods test(currentTestObject, std::move(commandLineMethods));
        test.invokeTests(currentTestObject);
    }

#ifndef QT_NO_EXCEPTIONS
    } catch (...) {
        QTestResult::addFailure("Caught unhandled exception", __FILE__, __LINE__);
        if (QTestResult::currentTestFunction()) {
            QTestResult::finishedCurrentTestFunction();
            QTestResult::setCurrentTestFunction(nullptr);
        }

        qCleanup();

        // Re-throw exception to make debugging easier
        throw;
        return 1;
    }
#endif

#if QT_CONFIG(valgrind)
    if (QBenchmarkGlobalData::current->mode() == QBenchmarkGlobalData::CallgrindParentProcess)
        return callgrindChildExitCode;
#endif
    // make sure our exit code is never going above 127
    // since that could wrap and indicate 0 test fails
    return qMin(QTestLog::failCount(), 127);
}

/*! \internal
*/
void QTest::qCleanup()
{
    currentTestObject = nullptr;

#if QT_CONFIG(valgrind)
    if (QBenchmarkGlobalData::current->mode() != QBenchmarkGlobalData::CallgrindParentProcess)
#endif
    {
        QTestLog::stopLogging();
        QTestTable::clearGlobalTestTable();
    }

    delete QBenchmarkGlobalData::current;
    QBenchmarkGlobalData::current = nullptr;

#if defined(Q_OS_MACOS)
    IOPMAssertionRelease(macPowerSavingDisabled);
#endif
}

/*!
  \overload
  \since 4.4

  Behaves identically to qExec(QObject *, int, char**) but takes a
  QStringList of \a arguments instead of a \c char** list.
*/
int QTest::qExec(QObject *testObject, const QStringList &arguments)
{
    const int argc = arguments.size();
    QVarLengthArray<char *> argv(argc);

    QList<QByteArray> args;
    args.reserve(argc);

    for (int i = 0; i < argc; ++i)
    {
        args.append(arguments.at(i).toLocal8Bit().constData());
        argv[i] = args.last().data();
    }

    return qExec(testObject, argc, argv.data());
}

/*! \internal
*/
void QTest::qFail(const char *message, const char *file, int line)
{
    QTestResult::fail(message, file, line);
}

/*! \internal
*/
bool QTest::qVerify(bool statement, const char *statementStr, const char *description,
                   const char *file, int line)
{
    return QTestResult::verify(statement, statementStr, description, file, line);
}

/*! \fn void QTest::qSkip(const char *message, const char *file, int line)
    \internal
*/
void QTest::qSkip(const char *message, const char *file, int line)
{
    QTestResult::addSkip(message, file, line);
    QTestResult::setSkipCurrentTest(true);
}

/*! \fn bool QTest::qExpectFail(const char *dataIndex, const char *comment, TestFailMode mode, const char *file, int line)
    \internal
*/
bool QTest::qExpectFail(const char *dataIndex, const char *comment,
                       QTest::TestFailMode mode, const char *file, int line)
{
    return QTestResult::expectFail(dataIndex, qstrdup(comment), mode, file, line);
}

/*!
    \internal

    Executes qFail() following a failed QVERIFY_THROWS_EXCEPTION or
    QVERIFY_THROWS_NO_EXCEPTION, passing a suitable message created from \a expected,
    \a what, along with \a file and \a line.

    The \a expected parameter contains the type of the exception that is expected to
    be thrown, or \nullptr, if no exception was expected.

    The \a what parameter contains the result of \c{std::exception::what()}, or nullptr,
    if a non-\c{std::exception}-derived exception was caught.

    The \a file and \a line parameters hold expansions of the \c{__FILE__} and \c{__LINE__}
    macros, respectively.
*/
void QTest::qCaught(const char *expected, const char *what, const char *file, int line)
{
    auto message = [&] {
        const auto exType  = what ? "std::" : "unknown ";
        const auto ofType  = expected ? " of type " : "";
        const auto no      = expected ? "an" : "no";
        const auto withMsg = what ? " with message " : "";
        const auto protect = [](const char *s) { return s ? s : ""; };

        return QString::asprintf("Expected %s exception%s%s to be thrown, "
                                 "but caught %sexception%s%s",
                                 no, ofType, protect(expected),
                                 exType, withMsg, protect(what));
    };
    qFail(message().toUtf8().constData(), file, line);
}


#if QT_DEPRECATED_SINCE(6, 3)
/*!
  \internal
  \deprecated [6.3] Use qWarning() instead
*/
void QTest::qWarn(const char *message, const char *file, int line)
{
    QTestLog::warn(message, file, line);
}
#endif

/*!
    Ignores messages created by qDebug(), qInfo() or qWarning(). If the \a message
    with the corresponding \a type is outputted, it will be removed from the
    test log. If the test finished and the \a message was not outputted,
    a test failure is appended to the test log.

    \note Invoking this function will only ignore one message. If the message
    you want to ignore is output twice, you have to call ignoreMessage() twice,
    too.

    Example:
    \snippet code/src_qtestlib_qtestcase.cpp 19

    The example above tests that QDir::mkdir() outputs the right warning when invoked
    with an invalid file name.
*/
void QTest::ignoreMessage(QtMsgType type, const char *message)
{
    QTestLog::ignoreMessage(type, message);
}

#if QT_CONFIG(regularexpression)
/*!
    \overload

    Ignores messages created by qDebug(), qInfo() or qWarning(). If the message
    matching \a messagePattern
    with the corresponding \a type is outputted, it will be removed from the
    test log. If the test finished and the message was not outputted,
    a test failure is appended to the test log.

    \note Invoking this function will only ignore one message. If the message
    you want to ignore is output twice, you have to call ignoreMessage() twice,
    too.

    \since 5.3
*/
void QTest::ignoreMessage(QtMsgType type, const QRegularExpression &messagePattern)
{
    QTestLog::ignoreMessage(type, messagePattern);
}
#endif // QT_CONFIG(regularexpression)

/*!
    \since 6.3
    \overload failOnWarning()

    Appends a test failure to the test log if the \a message is output.

    \sa failOnWarning()
*/
void QTest::failOnWarning(const char *message)
{
    return QTestLog::failOnWarning(message);
}

#if QT_CONFIG(regularexpression)
/*!
    \since 6.3

    Appends a test failure to the test log for each warning that matches
    \a messagePattern.

    The test function will continue execution when a failure is added. To abort
    the test instead, you can check \l currentTestFailed() and return early if
    it's \c true.

    For each warning, the first pattern that matches will cause a failure,
    and the remaining patterns will be ignored.

    All patterns are cleared at the end of each test function.

    \code
    void FileTest::loadFiles()
    {
        QTest::failOnWarning(QRegularExpression("^Failed to load"));

        // Each of these will cause a test failure:
        qWarning() << "Failed to load image";
        qWarning() << "Failed to load video";
    }
    \endcode

    To fail every test that triggers a given warning, pass a suitable regular
    expression to this function in \l {Creating a Test}{init()}:

    \code
    void FileTest::init()
    {
        QTest::failOnWarning(QRegularExpression(".?"));
    }
    \endcode

    \note \l ignoreMessage() takes precedence over this function, so any
    warnings that match a pattern given to both \c ignoreMessage() and
    \c failOnWarning() will be ignored.

    \sa {Qt Test Environment Variables}{QTEST_FATAL_FAIL}
*/
void QTest::failOnWarning(const QRegularExpression &messagePattern)
{
    QTestLog::failOnWarning(messagePattern);
}
#endif // QT_CONFIG(regularexpression)

/*! \internal
*/

#ifdef Q_OS_WIN
static inline bool isWindowsBuildDirectory(const QString &dirName)
{
    return dirName.compare("Debug"_L1, Qt::CaseInsensitive) == 0
           || dirName.compare("Release"_L1, Qt::CaseInsensitive) == 0;
}
#endif

#if QT_CONFIG(temporaryfile)
/*!
    Extracts a directory from resources to disk. The content is extracted
    recursively to a temporary folder. The extracted content is removed
    automatically once the last reference to the return value goes out of scope.

    \a dirName is the name of the directory to extract from resources.

    Returns the temporary directory where the data was extracted or null in case of
    errors.
*/
QSharedPointer<QTemporaryDir> QTest::qExtractTestData(const QString &dirName)
{
      QSharedPointer<QTemporaryDir> result; // null until success, then == tempDir

      QSharedPointer<QTemporaryDir> tempDir = QSharedPointer<QTemporaryDir>::create();

      tempDir->setAutoRemove(true);

      if (!tempDir->isValid())
          return result;

      const QString dataPath = tempDir->path();
      const QString resourcePath = u':' + dirName;
      const QFileInfo fileInfo(resourcePath);

      if (!fileInfo.isDir()) {
          qWarning("Resource path '%s' is not a directory.", qPrintable(resourcePath));
          return result;
      }

      QDirIterator it(resourcePath, QDirIterator::Subdirectories);
      if (!it.hasNext()) {
          qWarning("Resource directory '%s' is empty.", qPrintable(resourcePath));
          return result;
      }

      while (it.hasNext()) {
          QFileInfo fileInfo = it.nextFileInfo();

          if (!fileInfo.isDir()) {
              const QString destination = dataPath + u'/' + QStringView{fileInfo.filePath()}.mid(resourcePath.size());
              QFileInfo destinationFileInfo(destination);
              QDir().mkpath(destinationFileInfo.path());
              if (!QFile::copy(fileInfo.filePath(), destination)) {
                  qWarning("Failed to copy '%s'.", qPrintable(fileInfo.filePath()));
                  return result;
              }
              if (!QFile::setPermissions(destination, QFile::ReadUser | QFile::WriteUser | QFile::ReadGroup)) {
                  qWarning("Failed to set permissions on '%s'.", qPrintable(destination));
                  return result;
              }
          }
      }

      result = std::move(tempDir);

      return result;
}
#endif // QT_CONFIG(temporaryfile)

/*! \internal
*/

QString QTest::qFindTestData(const QString& base, const char *file, int line, const char *builddir,
                             const char *sourcedir)
{
    QString found;

    // Testdata priorities:

    //  1. relative to test binary.
    if (qApp) {
        QDir binDirectory(QCoreApplication::applicationDirPath());
        if (binDirectory.exists(base)) {
            found = binDirectory.absoluteFilePath(base);
        }
#ifdef Q_OS_WIN
        // Windows: The executable is typically located in one of the
        // 'Release' or 'Debug' directories.
        else if (isWindowsBuildDirectory(binDirectory.dirName())
                 && binDirectory.cdUp() && binDirectory.exists(base)) {
            found = binDirectory.absoluteFilePath(base);
        }
#endif // Q_OS_WIN
        else if (QTestLog::verboseLevel() >= 2) {
            const QString candidate = QDir::toNativeSeparators(QCoreApplication::applicationDirPath() + u'/' + base);
            QTestLog::info(qPrintable("testdata %1 not found relative to test binary [%2]; "
                                      "checking next location"_L1.arg(base, candidate)),
                           file, line);
        }
    }

    //  2. installed path.
    if (found.isEmpty()) {
        const char *testObjectName = QTestResult::currentTestObjectName();
        if (testObjectName) {
            const QString testsPath = QLibraryInfo::path(QLibraryInfo::TestsPath);
            const QString candidate = "%1/%2/%3"_L1
                .arg(testsPath, QFile::decodeName(testObjectName).toLower(), base);
            if (QFileInfo::exists(candidate)) {
                found = candidate;
            } else if (QTestLog::verboseLevel() >= 2) {
                QTestLog::info(qPrintable("testdata %1 not found in tests install path [%2]; "
                                          "checking next location"_L1
                                          .arg(base, QDir::toNativeSeparators(candidate))),
                               file, line);
            }
        }
    }

    //  3. relative to test source.
    if (found.isEmpty() && qstrncmp(file, ":/", 2) != 0) {
        // srcdir is the directory containing the calling source file.
        QFileInfo srcdir(QFileInfo(QFile::decodeName(file)).path());

        // If the srcdir is relative, that means it is relative to the current working
        // directory of the compiler at compile time, which should be passed in as `builddir'.
        if (!srcdir.isAbsolute() && builddir)
            srcdir.setFile(QFile::decodeName(builddir) + u'/' + srcdir.filePath());

        const QString canonicalPath = srcdir.canonicalFilePath();
        const QString candidate = "%1/%2"_L1.arg(canonicalPath, base);
        if (!canonicalPath.isEmpty() && QFileInfo::exists(candidate)) {
            found = candidate;
        } else if (QTestLog::verboseLevel() >= 2) {
            QTestLog::info(qPrintable(
                "testdata %1 not found relative to source path [%2]"_L1
                    .arg(base, QDir::toNativeSeparators(candidate))),
                file, line);
        }
    }

    // 4. Try resources
    if (found.isEmpty()) {
        const QString candidate = ":/%1"_L1.arg(base);
        if (QFileInfo::exists(candidate)) {
            found = candidate;
        } else if (QTestLog::verboseLevel() >= 2) {
            QTestLog::info(qPrintable(
                "testdata %1 not found in resources [%2]"_L1
                    .arg(base, QDir::toNativeSeparators(candidate))),
                file, line);
        }
    }

    // 5. Try current directory
    if (found.isEmpty()) {
        const QString candidate = QDir::currentPath() + u'/' + base;
        if (QFileInfo::exists(candidate)) {
            found = candidate;
        } else if (QTestLog::verboseLevel() >= 2) {
            QTestLog::info(qPrintable(
                "testdata %1 not found in current directory [%2]"_L1
                    .arg(base, QDir::toNativeSeparators(candidate))),
                file, line);
        }
    }

    // 6. Try main source directory
    if (found.isEmpty()) {
        const QString candidate = QTest::mainSourcePath % u'/' % base;
        if (QFileInfo::exists(candidate)) {
            found = candidate;
        } else if (QTestLog::verboseLevel() >= 2) {
            QTestLog::info(qPrintable(
                "testdata %1 not found in main source directory [%2]"_L1
                    .arg(base, QDir::toNativeSeparators(candidate))),
                file, line);
        }
    }

    // 7. Try the supplied source directory
    if (found.isEmpty() && sourcedir) {
        const QString candidate = QFile::decodeName(sourcedir) % u'/' % base;
        if (QFileInfo::exists(candidate)) {
            found = candidate;
        } else if (QTestLog::verboseLevel() >= 2) {
            QTestLog::info(qPrintable(
                "testdata %1 not found in supplied source directory [%2]"_L1
                    .arg(base, QDir::toNativeSeparators(candidate))),
                file, line);
        }
    }


    if (found.isEmpty()) {
        QTestLog::warn(qPrintable(
            "testdata %1 could not be located!"_L1.arg(base)),
            file, line);
    } else if (QTestLog::verboseLevel() >= 1) {
        QTestLog::info(qPrintable(
            "testdata %1 was located at %2"_L1.arg(base, QDir::toNativeSeparators(found))),
            file, line);
    }

    return found;
}

/*! \internal
*/
QString QTest::qFindTestData(const char *base, const char *file, int line, const char *builddir,
                             const char *sourcedir)
{
    return qFindTestData(QFile::decodeName(base), file, line, builddir, sourcedir);
}

/*! \internal
*/
void *QTest::qData(const char *tagName, int typeId)
{
    return fetchData(QTestResult::currentTestData(), tagName, typeId);
}

/*! \internal
*/
void *QTest::qGlobalData(const char *tagName, int typeId)
{
    return fetchData(QTestResult::currentGlobalTestData(), tagName, typeId);
}

/*! \internal
*/
void *QTest::qElementData(const char *tagName, int metaTypeId)
{
    QTEST_ASSERT(tagName);
    QTestData *data = QTestResult::currentTestData();
    QTEST_ASSERT(data);
    QTEST_ASSERT(data->parent());

    int idx = data->parent()->indexOf(tagName);
    QTEST_ASSERT(idx != -1);
    QTEST_ASSERT(data->parent()->elementTypeId(idx) == metaTypeId);

    return data->data(data->parent()->indexOf(tagName));
}

/*! \internal
*/
void QTest::addColumnInternal(int id, const char *name)
{
    QTestTable *tbl = QTestTable::currentTestTable();
    QTEST_ASSERT_X(tbl, "QTest::addColumn()", "Cannot add testdata outside of a _data slot.");

    tbl->addColumn(id, name);
}

/*!
    Appends a new row to the current test data. \a dataTag is the name of
    the testdata that will appear in the test output. Returns a QTestData reference
    that can be used to stream in data.

    Example:
    \snippet code/src_qtestlib_qtestcase.cpp 20

    \note This function can only be called as part of a test's data function
    that is invoked by the test framework.

    See \l {Chapter 2: Data Driven Testing}{Data Driven Testing} for
    a more extensive example.

    \sa addColumn(), QFETCH()
*/
QTestData &QTest::newRow(const char *dataTag)
{
    QTEST_ASSERT_X(dataTag, "QTest::newRow()", "Data tag cannot be null");
    QTestTable *tbl = QTestTable::currentTestTable();
    QTEST_ASSERT_X(tbl, "QTest::newRow()", "Cannot add testdata outside of a _data slot.");
    QTEST_ASSERT_X(tbl->elementCount(), "QTest::newRow()", "Must add columns before attempting to add rows.");

    return *tbl->newData(dataTag);
}

/*!
    \since 5.9

    Appends a new row to the current test data. The function's arguments are passed
    to qsnprintf() for formatting according to \a format. See the qvsnprintf()
    documentation for caveats and limitations.

    The formatted string will appear as the name of this test data in the test output.

    Returns a QTestData reference that can be used to stream in data.

    Example:
    \snippet code/src_qtestlib_qtestcase.cpp addRow

    \note This function can only be called as part of a test's data function
    that is invoked by the test framework.

    See \l {Chapter 2: Data Driven Testing}{Data Driven Testing} for
    a more extensive example.

    \sa addColumn(), QFETCH()
*/
QTestData &QTest::addRow(const char *format, ...)
{
    QTEST_ASSERT_X(format, "QTest::addRow()", "Format string cannot be null");
    QTestTable *tbl = QTestTable::currentTestTable();
    QTEST_ASSERT_X(tbl, "QTest::addRow()", "Cannot add testdata outside of a _data slot.");
    QTEST_ASSERT_X(tbl->elementCount(), "QTest::addRow()", "Must add columns before attempting to add rows.");

    char buf[1024];

    va_list va;
    va_start(va, format);
    // we don't care about failures, we accept truncation, as well as trailing garbage.
    // Names with more than 1K characters are nonsense, anyway.
    (void)qvsnprintf(buf, sizeof buf, format, va);
    buf[sizeof buf - 1] = '\0';
    va_end(va);

    return *tbl->newData(buf);
}

/*! \fn template <typename T> void QTest::addColumn(const char *name, T *dummy = 0)

    Adds a column with type \c{T} to the current test data.
    \a name is the name of the column. \a dummy is a workaround
    for buggy compilers and can be ignored.

    To populate the column with values, newRow() can be used. Use
    \l QFETCH() to fetch the data in the actual test.

    Example:
    \snippet code/src_qtestlib_qtestcase.cpp 21

    To add custom types to the testdata, the type must be registered with
    QMetaType via \l Q_DECLARE_METATYPE().

    \note This function can only be used called as part of a test's data
    function that is invoked by the test framework.

    See \l {Chapter 2: Data Driven Testing}{Data Driven Testing} for
    a more extensive example.

    \sa QTest::newRow(), QFETCH(), QMetaType
*/

/*!
    Returns the name of the binary that is currently executed.
*/
const char *QTest::currentAppName()
{
    return QTestResult::currentAppName();
}

/*!
    Returns the name of the test function that is currently executed.

    Example:

    \snippet code/src_qtestlib_qtestcase.cpp 22
*/
const char *QTest::currentTestFunction()
{
    return QTestResult::currentTestFunction();
}

/*!
    Returns the name of the current test data. If the test doesn't
    have any assigned testdata, the function returns 0.
*/
const char *QTest::currentDataTag()
{
    return QTestResult::currentDataTag();
}

/*!
    Returns \c true if the current test function failed, otherwise false.
*/
bool QTest::currentTestFailed()
{
    return QTestResult::currentTestFailed();
}

/*!
    \internal
    \since 6.4
    Returns \c true during the run of the test-function and its set-up.

    Used by the \c{QTRY_*} macros and \l QTestEventLoop to check whether to
    return when QTest::currentTestFailed() is true.
*/
bool QTest::runningTest()
{
    return QTest::inTestFunction;
}

/*! \internal
*/
QObject *QTest::testObject()
{
    return currentTestObject;
}

/*! \internal
*/
void QTest::setMainSourcePath(const char *file, const char *builddir)
{
    QString mainSourceFile = QFile::decodeName(file);
    QFileInfo fi;
    if (builddir)
        fi.setFile(QDir(QFile::decodeName(builddir)), mainSourceFile);
    else
        fi.setFile(mainSourceFile);
    QTest::mainSourcePath = fi.absolutePath();
}

#if QT_DEPRECATED_SINCE(6, 4)
/*! \internal
    \deprecated [6.4]
    This function is called by various specializations of QTest::qCompare
    to decide whether to report a failure and to produce verbose test output.

    The failureMsg parameter can be null, in which case a default message
    will be output if the compare fails.  If the compare succeeds, failureMsg
    will not be output.

    Using this function is not optimal, because it requires the string
    representations of \a actualVal and \a expectedVal to be pre-calculated,
    even though they will be used only if the comparison fails. Prefer using the
    \l compare_helper() overload that takes qxp::function_ref() for such cases.

    If the caller creates a custom failure message showing the compared values,
    or if those values cannot be stringified, use the overload of the function
    that takes no \a actualVal and \a expecetedVal parameters.
*/
bool QTest::compare_helper(bool success, const char *failureMsg,
                           char *actualVal, char *expectedVal,
                           const char *actual, const char *expected,
                           const char *file, int line)
{
    return QTestResult::compare(success, failureMsg, actualVal, expectedVal,
                                actual, expected, file, line);
}
#endif // QT_DEPRECATED_SINCE(6, 4)

/*! \internal
    \since 6.4
    This function is called by various specializations of QTest::qCompare
    to decide whether to report a failure and to produce verbose test output.

    The \a failureMsg parameter can be \c {nullptr}, in which case a default
    message will be output if the compare fails. If the comparison succeeds,
    \a failureMsg will not be output.

    This overload of the function uses qxp::function_ref to defer conversion of
    \a actualVal and \a expectedVal to strings until that is really needed
    (when the comparison fails). This speeds up test case execution on success.
*/
bool QTest::compare_helper(bool success, const char *failureMsg,
                           qxp::function_ref<const char *()> actualVal,
                           qxp::function_ref<const char *()> expectedVal,
                           const char *actual, const char *expected,
                           const char *file, int line)
{
    return QTestResult::reportResult(success, actualVal, expectedVal, actual, expected,
                                     QTest::ComparisonOperation::CustomCompare,
                                     file, line, failureMsg);
}

/*! \internal
    \since 6.4
    This function is called by various specializations of QTest::qCompare
    to decide whether to report a failure and to produce verbose test output.

    This overload should be used when there is no string representation of
    actual and expected values, so only the \a failureMsg is shown when the
    comparison fails. Because of that, \a failureMsg can't be \c {nullptr}.
    If the comparison succeeds, \a failureMsg will not be output.
*/
bool QTest::compare_helper(bool success, const char *failureMsg, const char *actual,
                           const char *expected, const char *file, int line)
{
    return QTestResult::compare(success, failureMsg, actual, expected, file, line);
}

template <typename T>
static bool floatingCompare(const T &actual, const T &expected)
{
    switch (qFpClassify(expected))
    {
    case FP_INFINITE:
        return (expected < 0) == (actual < 0) && qFpClassify(actual) == FP_INFINITE;
    case FP_NAN:
        return qFpClassify(actual) == FP_NAN;
    default:
        if (!qFuzzyIsNull(expected))
            return qFuzzyCompare(actual, expected);
        Q_FALLTHROUGH();
    case FP_SUBNORMAL: // subnormal is always fuzzily null
    case FP_ZERO:
        return qFuzzyIsNull(actual);
    }
}

/*! \fn bool QTest::qCompare(const qfloat16 &t1, const qfloat16 &t2, const char *actual, const char *expected, const char *file, int line)
    \internal
*/
bool QTest::qCompare(qfloat16 const &t1, qfloat16 const &t2, const char *actual, const char *expected,
                     const char *file, int line)
{
    return compare_helper(floatingCompare(t1, t2),
                          "Compared qfloat16s are not the same (fuzzy compare)",
                          [&t1] { return toString(t1); }, [&t2] { return toString(t2); },
                          actual, expected, file, line);
}

/*! \fn bool QTest::qCompare(const float &t1, const float &t2, const char *actual, const char *expected, const char *file, int line)
    \internal
*/
bool QTest::qCompare(float const &t1, float const &t2, const char *actual, const char *expected,
                     const char *file, int line)
{
    return QTestResult::compare(floatingCompare(t1, t2),
                                "Compared floats are not the same (fuzzy compare)",
                                t1, t2, actual, expected, file, line);
}

/*! \fn bool QTest::qCompare(const double &t1, const double &t2, const char *actual, const char *expected, const char *file, int line)
    \internal
*/
bool QTest::qCompare(double const &t1, double const &t2, const char *actual, const char *expected,
                     const char *file, int line)
{
    return QTestResult::compare(floatingCompare(t1, t2),
                                "Compared doubles are not the same (fuzzy compare)",
                                t1, t2, actual, expected, file, line);
}

/*! \fn bool QTest::qCompare(int t1, int t2, const char *actual, const char *expected, const char *file, int line)
    \internal
    \since 5.14
*/
bool QTest::qCompare(int t1, int t2, const char *actual, const char *expected,
                    const char *file, int line)
{
    return QTestResult::compare(t1 == t2,
                                "Compared values are not the same",
                                t1, t2, actual, expected, file, line);
}

#if QT_POINTER_SIZE == 8
/*! \fn bool QTest::qCompare(qsizetype t1, qsizetype t2, const char *actual, const char *expected, const char *file, int line)
    \internal
    \since 6.0
*/

bool QTest::qCompare(qsizetype t1, qsizetype t2, const char *actual, const char *expected,
                     const char *file, int line)
{
    return QTestResult::compare(t1 == t2,
                                "Compared values are not the same",
                                t1, t2, actual, expected, file, line);
}
#endif // QT_POINTER_SIZE == 8

/*! \fn bool QTest::qCompare(unsigned t1, unsigned t2, const char *actual, const char *expected, const char *file, int line)
    \internal
    \since 5.14
*/
bool QTest::qCompare(unsigned t1, unsigned t2, const char *actual, const char *expected,
                     const char *file, int line)
{
    return QTestResult::compare(t1 == t2,
                                "Compared values are not the same",
                                t1, t2, actual, expected, file, line);
}

/*! \fn bool QTest::qCompare(QStringView t1, QStringView t2, const char *actual, const char *expected, const char *file, int line)
    \internal
    \since 5.14
*/
bool QTest::qCompare(QStringView t1, QStringView t2, const char *actual, const char *expected,
                     const char *file, int line)
{
    return QTestResult::compare(t1 == t2,
                                "Compared values are not the same",
                                t1, t2, actual, expected, file, line);
}

/*!
    \internal
    \since 5.14
*/
bool QTest::qCompare(QStringView t1, const QLatin1StringView &t2, const char *actual, const char *expected,
                     const char *file, int line)
{
    return QTestResult::compare(t1 == t2,
                                "Compared values are not the same",
                                t1, t2, actual, expected, file, line);
}

/*!
    \internal
    \since 5.14
*/
bool QTest::qCompare(const QLatin1StringView &t1, QStringView t2, const char *actual, const char *expected,
                     const char *file, int line)
{
    return QTestResult::compare(t1 == t2,
                                "Compared values are not the same",
                                t1, t2, actual, expected, file, line);
}

/*! \fn bool QTest::qCompare(const QString &t1, const QString &t2, const char *actual, const char *expected, const char *file, int line)
    \internal
    \since 5.14
*/

/*! \fn bool QTest::qCompare(const QString &t1, const QLatin1StringView &t2, const char *actual, const char *expected, const char *file, int line)
    \internal
    \since 5.14
*/

/*! \fn bool QTest::qCompare(const QLatin1StringView &t1, const QString &t2, const char *actual, const char *expected, const char *file, int line)
    \internal
    \since 5.14
*/

/*! \fn bool QTest::qCompare(const double &t1, const float &t2, const char *actual, const char *expected, const char *file, int line)
    \internal
*/

/*! \fn bool QTest::qCompare(const float &t1, const double &t2, const char *actual, const char *expected, const char *file, int line)
    \internal
*/

#define TO_STRING_IMPL(TYPE, FORMAT) \
template <> Q_TESTLIB_EXPORT char *QTest::toString<TYPE>(const TYPE &t) \
{ \
    char *msg = new char[128]; \
    qsnprintf(msg, 128, #FORMAT, t); \
    return msg; \
}

TO_STRING_IMPL(short, %hd)
TO_STRING_IMPL(ushort, %hu)
TO_STRING_IMPL(int, %d)
TO_STRING_IMPL(uint, %u)
TO_STRING_IMPL(long, %ld)
TO_STRING_IMPL(ulong, %lu)
#if defined(Q_OS_WIN)
TO_STRING_IMPL(qint64, %I64d)
TO_STRING_IMPL(quint64, %I64u)
#else
TO_STRING_IMPL(qint64, %lld)
TO_STRING_IMPL(quint64, %llu)
#endif
TO_STRING_IMPL(bool, %d)
TO_STRING_IMPL(signed char, %hhd)
TO_STRING_IMPL(unsigned char, %hhu)

/*!
  \internal

  Be consistent about leading 0 in exponent.

  POSIX specifies that %e (hence %g when using it) uses at least two digits in
  the exponent, requiring a leading 0 on single-digit exponents; (at least)
  MinGW includes a leading zero also on an already-two-digit exponent,
  e.g. 9e-040, which differs from more usual platforms.  So massage that away.
*/
static void massageExponent(char *text)
{
    char *p = strchr(text, 'e');
    if (!p)
        return;
    const char *const end = p + strlen(p); // *end is '\0'
    p += (p[1] == '-' || p[1] == '+') ? 2 : 1;
    if (p[0] != '0' || end - 2 <= p)
        return;
    // We have a leading 0 on an exponent of at least two more digits
    const char *n = p + 1;
    while (end - 2 > n && n[0] == '0')
        ++n;
    memmove(p, n, end + 1 - n);
}

// Be consistent about display of infinities and NaNs (snprintf()'s varies,
// notably on MinGW, despite POSIX documenting "[-]inf" or "[-]infinity" for %f,
// %e and %g, uppercasing for their capital versions; similar for "nan"):
#define TO_STRING_FLOAT(TYPE, FORMAT) \
template <> Q_TESTLIB_EXPORT char *QTest::toString<TYPE>(const TYPE &t) \
{ \
    char *msg = new char[128]; \
    switch (qFpClassify(t)) { \
    case FP_INFINITE: \
        qstrncpy(msg, (t < 0 ? "-inf" : "inf"), 128); \
        break; \
    case FP_NAN: \
        qstrncpy(msg, "nan", 128); \
        break; \
    default: \
        qsnprintf(msg, 128, #FORMAT, double(t));    \
        massageExponent(msg); \
        break; \
    } \
    return msg; \
}

TO_STRING_FLOAT(qfloat16, %.3g)
TO_STRING_FLOAT(float, %g)
TO_STRING_FLOAT(double, %.12g)

template <> Q_TESTLIB_EXPORT char *QTest::toString<char>(const char &t)
{
    unsigned char c = static_cast<unsigned char>(t);
    char *msg = new char[16];
    switch (c) {
    case 0x00:
        qstrcpy(msg, "'\\0'");
        break;
    case 0x07:
        qstrcpy(msg, "'\\a'");
        break;
    case 0x08:
        qstrcpy(msg, "'\\b'");
        break;
    case 0x09:
        qstrcpy(msg, "'\\t'");
        break;
    case 0x0a:
        qstrcpy(msg, "'\\n'");
        break;
    case 0x0b:
        qstrcpy(msg, "'\\v'");
        break;
    case 0x0c:
        qstrcpy(msg, "'\\f'");
        break;
    case 0x0d:
        qstrcpy(msg, "'\\r'");
        break;
    case 0x22:
        qstrcpy(msg, "'\\\"'");
        break;
    case 0x27:
        qstrcpy(msg, "'\\\''");
        break;
    case 0x5c:
        qstrcpy(msg, "'\\\\'");
        break;
    default:
        if (c < 0x20 || c >= 0x7F)
            qsnprintf(msg, 16, "'\\x%02x'", c);
        else
            qsnprintf(msg, 16, "'%c'" , c);
    }
    return msg;
}

/*! \internal
*/
char *QTest::toString(const char *str)
{
    if (!str) {
        char *msg = new char[1];
        *msg = '\0';
        return msg;
    }
    char *msg = new char[strlen(str) + 1];
    return qstrcpy(msg, str);
}

/*! \internal
*/
char *QTest::toString(const volatile void *p) // Use volatile to match compare_ptr_helper()
{
    return QTest::toString(const_cast<const void *>(p));
}

char *QTest::toString(const void *p)
{
    char *msg = new char[128];
    qsnprintf(msg, 128, "%p", p);
    return msg;
}

/*! \internal
*/
char *QTest::toString(const volatile QObject *vo)
{
    if (vo == nullptr)
        return qstrdup("<null>");

    auto *o = const_cast<const QObject*>(vo);
    const QString &name = o->objectName();
    const char *className = o->metaObject()->className();
    char *msg = new char[256];
    if (name.isEmpty())
        qsnprintf(msg, 256, "%s/%p", className, o);
    else
        qsnprintf(msg, 256, "%s/\"%s\"", className, qPrintable(name));
    return msg;
}

/*! \fn char *QTest::toString(const QColor &color)
    \internal
*/

/*! \fn char *QTest::toString(const QRegion &region)
    \internal
*/

/*! \fn char *QTest::toString(const QHostAddress &addr)
    \internal
*/

/*! \fn char *QTest::toString(QNetworkReply::NetworkError code)
    \internal
*/

/*! \fn char *QTest::toString(const QNetworkCookie &cookie)
    \internal
*/

/*! \fn char *QTest::toString(const QList<QNetworkCookie> &list)
    \internal
*/

/*! \internal
*/
bool QTest::compare_string_helper(const char *t1, const char *t2, const char *actual,
                                  const char *expected, const char *file, int line)
{
    return compare_helper(qstrcmp(t1, t2) == 0, "Compared strings are not the same",
                          [t1] { return toString(t1); }, [t2] { return toString(t2); },
                          actual, expected, file, line);
}

/*!
   \namespace QTest::Internal
   \internal
*/

/*! \fn bool QTest::compare_ptr_helper(const volatile void *t1, const volatile void *t2, const char *actual, const char *expected, const char *file, int line)
    \internal
*/

/*! \fn bool QTest::compare_ptr_helper(const volatile void *t1, std::nullptr_t, const char *actual, const char *expected, const char *file, int line)
    \internal
*/

/*! \fn bool QTest::compare_ptr_helper(std::nullptr_t, const volatile void *t2, const char *actual, const char *expected, const char *file, int line)
    \internal
*/

/*! \fn template <typename T1, typename T2> bool QTest::qCompare(const T1 &t1, const T2 &t2, const char *actual, const char *expected, const char *file, int line)
    \internal
*/

/*! \fn bool QTest::qCompare(const QIcon &t1, const QIcon &t2, const char *actual, const char *expected, const char *file, int line)
    \internal
*/

/*! \fn bool QTest::qCompare(const QImage &t1, const QImage &t2, const char *actual, const char *expected, const char *file, int line)
    \internal
*/

/*! \fn bool QTest::qCompare(const QPixmap &t1, const QPixmap &t2, const char *actual, const char *expected, const char *file, int line)
    \internal
*/

/*! \fn template <typename T> bool QTest::qCompare(const T &t1, const T &t2, const char *actual, const char *expected, const char *file, int line)
    \internal
*/

/*! \fn template <typename T> bool QTest::qCompare(const T *t1, const T *t2, const char *actual, const char *expected, const char *file, int line)
    \internal
*/

/*! \fn template <typename T> bool QTest::qCompare(T *t, std::nullptr_t, const char *actual, const char *expected, const char *file, int line)
    \internal
*/

/*! \fn template <typename T> bool QTest::qCompare(std::nullptr_t, T *t, const char *actual, const char *expected, const char *file, int line)
    \internal
*/

/*! \fn template <typename T> bool QTest::qCompare(T *t1, T *t2, const char *actual, const char *expected, const char *file, int line)
    \internal
*/

/*! \fn template <typename T1, typename T2> bool QTest::qCompare(const T1 *t1, const T2 *t2, const char *actual, const char *expected, const char *file, int line)
    \internal
*/

/*! \fn template <typename T1, typename T2> bool QTest::qCompare(T1 *t1, T2 *t2, const char *actual, const char *expected, const char *file, int line)
    \internal
*/

/*! \fn bool QTest::qCompare(const char *t1, const char *t2, const char *actual, const char *expected, const char *file, int line)
    \internal
*/

/*! \fn bool QTest::qCompare(char *t1, char *t2, const char *actual, const char *expected, const char *file, int line)
    \internal
*/

/*! \fn bool QTest::qCompare(char *t1, const char *t2, const char *actual, const char *expected, const char *file, int line)
    \internal
*/

/*! \fn bool QTest::qCompare(const char *t1, char *t2, const char *actual, const char *expected, const char *file, int line)
    \internal
*/

/*! \fn bool QTest::qCompare(const QString &t1, const QLatin1StringView &t2, const char *actual, const char *expected, const char *file, int line)
    \internal
*/

/*! \fn bool QTest::qCompare(const QLatin1StringView &t1, const QString &t2, const char *actual, const char *expected, const char *file, int line)
    \internal
*/

/*! \fn bool QTest::qCompare(const QStringList &t1, const QStringList &t2, const char *actual, const char *expected, const char *file, int line)
    \internal
*/

/*! \fn  template <typename T> bool QTest::qCompare(const QList<T> &t1, const QList<T> &t2, const char *actual, const char *expected, const char *file, int line)
    \internal
*/

/*! \fn template <typename T> bool QTest::qCompare(const QFlags<T> &t1, const T &t2, const char *actual, const char *expected, const char *file, int line)
    \internal
*/

/*! \fn template <typename T> bool QTest::qCompare(const QFlags<T> &t1, const int &t2, const char *actual, const char *expected, const char *file, int line)
    \internal
*/

/*! \fn bool QTest::qCompare(const qint64 &t1, const qint32 &t2, const char *actual, const char *expected, const char *file, int line)
    \internal
*/

/*! \fn bool QTest::qCompare(const qint64 &t1, const quint32 &t2, const char *actual, const char *expected, const char *file, int line)
    \internal
*/

/*! \fn bool QTest::qCompare(const quint64 &t1, const quint32 &t2, const char *actual, const char *expected, const char *file, int line)
    \internal
*/

/*! \fn bool QTest::qCompare(const qint32 &t1, const qint64 &t2, const char *actual, const char *expected, const char *file, int line)
    \internal
*/

/*! \fn bool QTest::qCompare(const quint32 &t1, const qint64 &t2, const char *actual, const char *expected, const char *file, int line)
    \internal
*/

/*! \fn bool QTest::qCompare(const quint32 &t1, const quint64 &t2, const char *actual, const char *expected, const char *file, int line)
    \internal
*/

/*! \fn  template <typename T> bool QTest::qTest(const T& actual, const char *elementName, const char *actualStr, const char *expected, const char *file, int line)
    \internal
*/

/*! \fn void QTest::sendKeyEvent(KeyAction action, QWidget *widget, Qt::Key code, QString text, Qt::KeyboardModifiers modifier, int delay=-1)
    \internal
*/

/*! \fn void QTest::sendKeyEvent(KeyAction action, QWindow *window, Qt::Key code, QString text, Qt::KeyboardModifiers modifier, int delay=-1)
    \internal
*/

/*! \fn void QTest::sendKeyEvent(KeyAction action, QWidget *widget, Qt::Key code, char ascii, Qt::KeyboardModifiers modifier, int delay=-1)
    \internal
*/

/*! \fn void QTest::sendKeyEvent(KeyAction action, QWindow *window, Qt::Key code, char ascii, Qt::KeyboardModifiers modifier, int delay=-1)
    \internal
*/

/*! \fn void QTest::simulateEvent(QWidget *widget, bool press, int code, Qt::KeyboardModifiers modifier, QString text, bool repeat, int delay=-1)
    \internal
*/

/*! \fn void QTest::simulateEvent(QWindow *window, bool press, int code, Qt::KeyboardModifiers modifier, QString text, bool repeat, int delay=-1)
    \internal
*/

QT_END_NAMESPACE
