def test_equal_2(self):
     self.assertEqual(esrever('a small lOan OF 1,000,000 $!'),
                      '$ 000,000,1 FO naOl llams a!')
 def test_equal_1(self):
     self.assertEqual(esrever('an Easy one?'), 'eno ysaE na?')
 def test_equal_4(self):
     self.assertEqual(esrever('b3tTer p4ss thIS 0ne.'),
                      'en0 SIht ss4p reTt3b.')
 def test_equal_5(self):
     self.assertEqual(esrever(''), '')
 def test_equal_3(self):
     self.assertEqual(esrever('<?> &!.".'), '".!& >?<.')