static void AssertFailure( ITestListener listener, TestRunState testRunState, string messageType) { Assert.Equal(TestRunState.Failure, testRunState); var testResult = listener.Captured(x => x.TestFinished(null)).Arg <TestResult>(); Assert.Equal($"*** {messageType} ***", testResult.Name); Assert.Equal(TestState.Failed, testResult.State); Assert.Equal(1, testResult.TotalTests); Assert.Equal("ExceptionType : This is my message \t\r\n", testResult.Message); Assert.Equal("Line 1\r\nLine 2\r\nLine 3", testResult.StackTrace); }