def test_should_return_pyramid_if_lowercase(self):
     pyramid = text_pyramid.get_strings('apple')
     expected_pyramid = [
         'a',
         'ap',
         'app',
         'appl',
         'apple',
         'appl',
         'app',
         'ap',
         'a',
     ]
     self.assertEqual(pyramid, expected_pyramid)
 def test_should_return_list_of_strings(self):
     pyramid = text_pyramid.get_strings('a')
     self.assertEqual(pyramid, ['a'])