public void CipherLettersOnlyAndReturnsSameCharIfNotLetter()
{
char letter = '_';
int shift = 7;
char expectedResult = '_';
Caesar caesar = new Caesar();
char actualResult = caesar.CipherLetter(letter, shift);
Assert.AreEqual(expectedResult, actualResult);
}
public void CipherLetterCorrectlyShiftsSingleChar()
{
char letter = 'a';
int shift = 7;
char expectedResult = 'h';
Caesar caesar = new Caesar();
char actualResult = caesar.CipherLetter(letter, shift);
Assert.AreEqual(expectedResult, actualResult);
}