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Add failing test to reproduce #859 #860

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Add failing test to reproduce #859 #860

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1213f5d
Add failing test to reproduce #859
tom-englert Jun 16, 2022
5ffe42f
Omit test that does not run in Net40
tom-englert Jun 16, 2022
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48 changes: 48 additions & 0 deletions Test/Mono.Cecil.Tests/ImageWriteTests.cs
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using System.IO;
using System.Linq;
using NUnit.Framework;

#if NETCOREAPP

namespace Mono.Cecil.Tests {
[TestFixture]
public class ImageWriteTests : BaseTestFixture {

[TestCase("EmbeddedPdbTarget.exe")]
// [TestCase("ExternalPdbDeterministic.dll")]
public void MultipleWriteOperationsShouldReturnSameOutput (string testee)
{
TestModule (testee, module => {
Assert.IsTrue (module.HasDebugHeader);

const int numberOfStreams = 5;

MemoryStream Write(int _)
{
var stream = new MemoryStream ();
module.Write (stream, new WriterParameters { WriteSymbols = true });
return stream;
}

var streams = Enumerable.Range (0, numberOfStreams)
.Select (Write)
.ToArray ();

static bool AreStreamsEqual ((MemoryStream First, MemoryStream Second) pair)
{
var buffer1 = pair.First.GetBuffer ();
var buffer2 = pair.Second.GetBuffer ();
return buffer1.SequenceEqual (buffer2);
}

var results = streams.Zip (streams.Skip (1))
.Select (AreStreamsEqual)
.ToArray ();

Assert.That (results, Is.EquivalentTo (results.Select (_ => true)));
});
}
}
}

#endif