def test_fourth(self):
result = antipode_ck(self.t3_2)
expected = LinearCombination()
expected[Forest((self.t3_2, ))] = -1
expected[Forest((self.t2_1, self.t1_1))] = 2
expected[Forest((self.t1_1, self.t1_1, self.t1_1))] = -1
self.assertEqual(expected, result)
def test_first(self):
result = antipode_ck(self.t1_1)
expected = LinearCombination()
expected[Forest((leaf, ))] = -1
self.assertEqual(expected, result)
def test_second(self):
result = antipode_ck(self.t2_1)
expected = LinearCombination()
expected[Forest((self.t2_1, ))] = -1
expected[Forest((self.t1_1, self.t1_1))] = 1
self.assertEqual(expected, result)
def test_empty(self):
result = antipode_ck(self.et)
expected = LinearCombination()
expected[empty_tree] = 1
self.assertEqual(expected, result)