def test_extend_maybe_dict(self):
list1 = {1: [2]}
extend_maybe(list1, None)
self.assertEqual({1: [2]}, list1)
extend_maybe(list1, {})
self.assertEqual({1: [2]}, list1)
extend_maybe(list1, {3: [4]})
self.assertEqual({1: [2], 3: [4]}, list1)
extend_maybe(list1, {1: [5]})
self.assertEqual({1: [2, 5], 3: [4]}, list1)
def test_extend_maybe_list(self):
list1 = [1]
extend_maybe(list1, None)
self.assertEqual([1], list1)
extend_maybe(list1, [])
self.assertEqual([1], list1)
extend_maybe(list1, [2])
self.assertEqual([1, 2], list1)
