def test_caesar_empty(self):
self.assertEquals('', caesar_cipher('', 0))
self.assertEquals('', caesar_cipher('', 5))
self.assertEquals('', caesar_cipher('', -5))
def test_caesar_shifting_left(self):
self.assertEquals('zab', caesar_cipher('abc', -1))
self.assertEquals('yza', caesar_cipher('abc', -2))
self.assertEquals('abc', caesar_cipher('abc', -26))
def test_caesar_shifting_right(self):
self.assertEquals('bcd', caesar_cipher('abc', 1))
self.assertEquals('cde', caesar_cipher('abc', 2))
self.assertEquals('abc', caesar_cipher('abc', 26))
def test_caesar_empty(self):
self.assertEquals('', caesar_cipher('', 0))
self.assertEquals('', caesar_cipher('', 5))
self.assertEquals('', caesar_cipher('', -5))
def test_caesar_shifting_left(self):
self.assertEquals('zab', caesar_cipher('abc', -1))
self.assertEquals('yza', caesar_cipher('abc', -2))
self.assertEquals('abc', caesar_cipher('abc', -26))
def test_caesar_shifting_right(self):
self.assertEquals('bcd', caesar_cipher('abc', 1))
self.assertEquals('cde', caesar_cipher('abc', 2))
self.assertEquals('abc', caesar_cipher('abc', 26))
