public void Dispose() { // Setup LocalMachine machine1 = LocalMachine.New(null, null); machine1.Name = "Test"; _history.AddCoreAction(CoreAction.Reset(100)); int len1 = _mockFile.LineCount(); // Act _file.Dispose(); machine1.Name = "Test"; _history.AddCoreAction(CoreAction.Reset(100)); int len2 = _mockFile.LineCount(); // Verify Assert.NotZero(len1); Assert.AreEqual(len1, len2); }