public void Should_BeSuccessfulTest(string stringToAssert)
        {
            // arrange / act
            string successfulTest = DefaultTestCase.SuccessfulTest();

            // assert
            successfulTest.ShouldBe(stringToAssert);
        }
        public void Should_BeFailedTest(string stringToAssert)
        {
            // arrange / act
            string failingTestString = DefaultTestCase.FailedTest();

            // assert
            failingTestString.ShouldBe(stringToAssert);
        }