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15 changes: 15 additions & 0 deletions System.IO.Abstractions.TestingHelpers.Tests/MockFileStreamTests.cs
Original file line number Diff line number Diff line change
Expand Up @@ -106,5 +106,20 @@ public void MockFileStream_Dispose_MultipleCallsDontThrow()
// Assert
Assert.DoesNotThrow(() => stream.Dispose());
}

[Test]
public void MockFileStream_Dispose_OperationsAfterDisposeThrow()
{
var fileSystem = new MockFileSystem();
var path = XFS.Path("C:\\test");
fileSystem.AddFile(path, new MockFileData(new byte[0]));
var stream = fileSystem.FileInfo.FromFileName(path).OpenWrite();

// Act
stream.Dispose();

// Assert
Assert.Throws<ObjectDisposedException>(() => stream.WriteByte(0));
}
}
}
7 changes: 7 additions & 0 deletions System.IO.Abstractions.TestingHelpers/MockFileStream.cs
Original file line number Diff line number Diff line change
Expand Up @@ -8,6 +8,7 @@ public class MockFileStream : MemoryStream
private readonly bool canWrite = true;
private readonly FileOptions options;
private bool disposed;
private bool closed;

public enum StreamType
{
Expand Down Expand Up @@ -64,8 +65,14 @@ public MockFileStream(
#if NET40
public override void Close()
{
if (closed)
{
return;
}
InternalFlush();
base.Close();
OnClose();
closed = true;
}
#else
protected override void Dispose(bool disposing)
Expand Down