// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.

#nullable disable

using System;
using Xunit;

namespace Microsoft.AspNetCore.Razor.Language.Legacy;

public class CSharpExplicitExpressionTest : ParserTestBase
{
    [Fact]
    public void ShouldOutputZeroLengthCodeSpanIfExplicitExpressionIsEmpty()
    {
        ParseDocumentTest("@()");
    }

    [Fact]
    public void ShouldOutputZeroLengthCodeSpanIfEOFOccursAfterStartOfExplicitExpr()
    {
        // ParseBlockShouldOutputZeroLengthCodeSpanIfEOFOccursAfterStartOfExplicitExpression
        ParseDocumentTest("@(");
    }

    [Fact]
    public void ShouldAcceptEscapedQuoteInNonVerbatimStrings()
    {
        ParseDocumentTest("@(\"\\\"\")");
    }

    [Fact]
    public void ShouldAcceptEscapedQuoteInVerbatimStrings()
    {
        ParseDocumentTest("@(@\"\"\"\")");
    }

    [Fact]
    public void ShouldAcceptMultipleRepeatedEscapedQuoteInVerbatimStrings()
    {
        ParseDocumentTest("@(@\"\"\"\"\"\")");
    }

    [Fact]
    public void ShouldAcceptMultiLineVerbatimStrings()
    {
        ParseDocumentTest(@"@(@""" + Environment.NewLine
                     + @"Foo" + Environment.NewLine
                     + @"Bar" + Environment.NewLine
                     + @"Baz" + Environment.NewLine
                     + @""")");
    }

    [Fact]
    public void ShouldAcceptMultipleEscapedQuotesInNonVerbatimStrings()
    {
        ParseDocumentTest("@(\"\\\"hello, world\\\"\")");
    }

    [Fact]
    public void ShouldAcceptMultipleEscapedQuotesInVerbatimStrings()
    {
        ParseDocumentTest("@(@\"\"\"hello, world\"\"\")");
    }

    [Fact]
    public void ShouldAcceptConsecutiveEscapedQuotesInNonVerbatimStrings()
    {
        ParseDocumentTest("@(\"\\\"\\\"\")");
    }

    [Fact]
    public void ShouldAcceptConsecutiveEscapedQuotesInVerbatimStrings()
    {
        ParseDocumentTest("@(@\"\"\"\"\"\")");
    }
}
