def test_ThisMoreThanOneIsVarious(self):
self.assertEquals(encrypt("This is a test!", 3), " Tah itse sits!")
self.assertEquals(encrypt("This is a test!", 4), "This is a test!")
self.assertEquals(encrypt("This is a test!", -1), "This is a test!")
self.assertEquals(encrypt("This kata is very interesting!", 1),
"hskt svr neetn!Ti aai eyitrsig")
def test_ThisTwoIsS_eT(self):
self.assertEquals(encrypt("This is a test!", 2), "s eT ashi tist!")
def test_ThisOneIsHsi(self):
self.assertEquals(encrypt("This is a test!", 1), "hsi etTi sats!")
def test_ThisZeroIsThis(self):
self.assertEquals(encrypt("This is a test!", 0), "This is a test!")
def test_NoneIsNone(self):
self.assertEquals(encrypt(None, 0), None)
def test_NullIsNull(self):
self.assertEquals(encrypt("", 0), "")