def test_non_palidromes2(self):
self.assertEqual('nomolos',
reverse_string('solomon'),
msg='should return `nomolos` for `solomon`')
def test_non_palidromes3(self):
self.assertEqual('csim',
reverse_string('misc'),
msg='should return `csim` for `misc`')
def test_non_palidromes1(self):
self.assertEqual('skoob',
reverse_string('books'),
msg='should return `skoob` for `books`')
def test_palidromes3(self):
self.assertTrue(reverse_string('civic'),
msg='should return true for `civic`')
def test_palidromes2(self):
self.assertTrue(reverse_string('NaN'),
msg='should return true for `NaN`')
def test_palidromes1(self):
self.assertTrue(reverse_string('anna'),
msg='should return true for `anna`')
def test_empty_string(self):
self.assertIsNone(reverse_string(''),
msg='should return `None` for empty string')
