public static void IsUpperLetter_Fails_ForNullString() => Assert.False(Ascii.IsUpperLetter(null));
public static void IsUpperLetter_ReturnsTrue_ForValidInput(string value) => Assert.True(Ascii.IsUpperLetter(value));
public static void IsUpperLetter_ReturnsFalse_ForInvalidInput(string value) => Assert.False(Ascii.IsUpperLetter(value));
public static void IsUpperLetter_Fails_ForEmptyString() => Assert.False(Ascii.IsUpperLetter(String.Empty));