// ==========================================================================
//                 SeqAn - The Library for Sequence Analysis
// ==========================================================================
// Copyright (c) 2006-2026, Knut Reinert, FU Berlin
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// ==========================================================================
// Author: Manuel Holtgrewe <manuel.holtgrewe@fu-berlin.de>
// ==========================================================================
// Tests for the random number generation code in seqan/random.
// ==========================================================================

#ifndef TEST_RANDOM_TEST_RANDOM_BASIC_H_
#define TEST_RANDOM_TEST_RANDOM_BASIC_H_

// Test GetDefaultRang and defaultRng().
SEQAN_DEFINE_TEST(test_default_rng)
{
    using namespace seqan2;

    // Test that calling the function works.
    typedef String<Dna> TTag;
    typedef typename GetDefaultRng<TTag>::Type TRng;
    TRng & rng = defaultRng(TTag());
    (void)rng;

    // Test that a reference is returned and the global state changes.
    typedef typename TRng::result_type TValue;
    TValue x1 = defaultRng(TTag())();
    TValue x2 = defaultRng(TTag())();
    TValue x3 = defaultRng(TTag())();
    SEQAN_ASSERT(x1 != x2 || x2 != x3);  // 3 times the same value is not probable!
}

#endif  // TEST_RANDOM_TEST_RANDOM_BASIC_H_
