def test_reset(self):
h = History()
h.append(C, D)
self.assertEqual(len(h), 1)
self.assertEqual(h.cooperations, 1)
h.reset()
self.assertEqual(len(h), 0)
self.assertEqual(h.cooperations, 0)
def test_str_list_repr(self):
h = History()
h.append(C, D)
h.append(D, C)
h.append(C, D)
self.assertEqual(str(h), "CDC")
self.assertEqual(list(h), [C, D, C])
self.assertEqual(repr(h), "[C, D, C]")
h2 = h.flip_plays()
self.assertEqual(str(h2), "DCD")