public void IsVowelRecognizesVowels()
 {
     foreach (var vowel in CharacterRanges.Vowels)
     {
         Assert.True(SpecialCharacterChecker.IsVowel(vowel));
     }
 }
 public void IsVowelInvalidCases(char character)
 {
     Assert.False(SpecialCharacterChecker.IsVowel(character));
 }
 public void IsVowelExcludingY()
 {
     Assert.False(SpecialCharacterChecker.IsVowel('y', false));
 }