sharpcompress/tests/SharpCompress.Test/Streams/ChecksumReadRegressionTests.cs

using System;
using System.IO;
using System.Threading;
using System.Threading.Tasks;
using SharpCompress.Common;
using SharpCompress.Common.GZip;
using SharpCompress.Crypto;
using Xunit;

namespace SharpCompress.Test.Streams;

public class ChecksumReadRegressionTests
{
    [Theory]
    [InlineData(false)]
    [InlineData(true)]
    public async Task Zero_Length_Read_Does_Not_Validate(bool gzip)
    {
        byte[] payload = [1, 2, 3];
        var crc = Crc32Stream.Compute(payload);
        using var input = new MemoryStream(payload);
        using var raw = new MemoryStream();
        using Stream stream = gzip
            ? new GZipChecksumValidationStream(input, raw, "test", crc, 3)
            : new ChecksumValidationStream(
                input,
                new ChecksumDescriptor(ChecksumKind.Crc32, crc, true),
                "test"
            );
        Assert.Equal(0, stream.Read(Array.Empty<byte>(), 0, 0));
        Assert.Equal(0, await stream.ReadAsync(Array.Empty<byte>(), 0, 0, CancellationToken.None));
#if !LEGACY_DOTNET
        Assert.Equal(0, stream.Read(Span<byte>.Empty));
        Assert.Equal(0, await stream.ReadAsync(Memory<byte>.Empty, CancellationToken.None));
#endif
        using var output = new MemoryStream();
        await stream.CopyToAsync(output, 81920, CancellationToken.None);
        Assert.Equal(payload, output.ToArray());
    }
}