def test_equals(self):
     self.assertEqual(combine(['a', 'b', 'c'], [1, 2, 3]),
                      ['a', 1, 'b', 2, 'c', 3])
 def test_equals(self):
     self.assertEqual(combine(['a', 'b', 'c'], [1, 2, 3]),
                      ['a', 1, 'b', 2, 'c', 3])
 def test_equals_3(self):
     self.assertEqual(
         combine(['a', 'b', 'c'], [1, 2, 3, 4, 5], [6, 7], [8]),
         ['a', 1, 6, 8, 'b', 2, 7, 'c', 3, 4, 5])
 def test_equals_3(self):
     self.assertEqual(combine(
         ['a', 'b', 'c'], [1, 2, 3, 4, 5], [6, 7], [8]),
         ['a', 1, 6, 8, 'b', 2, 7, 'c', 3, 4, 5])