public void TimeConversionTests() { // Case One (Correct) var inputCaseOne = "05:45:54AM"; var exercise = new TimeConversion(inputCaseOne); var resultCaseOne = exercise.Execute(); var expectedOutputCaseOne = "05:45:54"; Assert.AreEqual(expectedOutputCaseOne, resultCaseOne); // Case Two (Check Constraints) var inputCaseTwo = "15:45:54AM"; Assert.ThrowsException <ConstraintException>( () => new TimeConversion(inputCaseTwo)); }