public void ShouldFindTwoSInMysterious()
        {
            var stringToCheck = "mysterious";
            var stringToFind = "s";
            var expectedResult = 2;
            var classUnderTest = new StringUtilities();

            var actualResult =
                classUnderTest.CountOccurences(stringToCheck, stringToFind);

            Assert.AreEqual(expectedResult, actualResult);
        }
        public void SearchShouldBeCaseSensitive()
        {
            var stringToCheck = "mySterious";
            var stringToFind = "s";
            var expectedResult = 2;
            var classUnderTest = new StringUtilities();

            var actualResult =
                classUnderTest.CountOccurences(stringToCheck, stringToFind);

            Assert.AreEqual(expectedResult, actualResult);
        }