def test_equal_2(self): self.assertEqual(cypher('I am your father'), '1 4m y0ur f47h3r')
def test_equal_1(self): self.assertEqual(cypher('Hello World'), 'H3110 W0r1d')
def test_equal_4(self): self.assertEqual(cypher('IlRzEeAaSsGbTtBgOo'), '112233445566778900')
def test_equal_5(self): self.assertEqual(cypher(''), '')
def test_equal_3(self): self.assertEqual(cypher( 'I do not know what else I can test. Be cool. Good luck' ), '1 d0 n07 kn0w wh47 3153 1 c4n 7357. 83 c001. 600d 1uck')