TestingHelper.File.Copy initialises contents via object reference

[Will-Crabb]

When you copy a file the file contents gets passed as a reference instead of being cloned. If I copy FileA.txt to FileB.txt, they will both point to the same contents object. When I then change the contents of FileA.txt, FileB.txt will also update.

        var mockFileSystem = new MockFileSystem();
        mockFileSystem.AddFile("C:\\Test1.txt", "");
        mockFileSystem.File.Copy("C:\\Test1.txt", "C:\\Test2.txt");

        var before1 = mockFileSystem.FileInfo.FromFileName("C:\\Test1.txt").Length;
        var before2 = mockFileSystem.FileInfo.FromFileName("C:\\Test2.txt").Length;

        using (var stream = mockFileSystem.File.Open("C:\\Test1.txt", FileMode.Open, FileAccess.ReadWrite))
        {
            var binaryWriter = new System.IO.BinaryWriter(stream);

            binaryWriter.Seek(0, SeekOrigin.Begin);
            binaryWriter.Write("Some text");
        }

        var after1 = mockFileSystem.FileInfo.FromFileName("C:\\Test1.txt").Length;
        var after2 = mockFileSystem.FileInfo.FromFileName("C:\\Test2.txt").Length;

[fgreinacher]

Thanks for reporting!

[fgreinacher]

@Will-Crabb The fix is merged and will be available within the next couple of minutes.