def test_is_symmetrical(self):
unlabelled_leaf = RankTree(children=[])
assert unlabelled_leaf.is_symmetrical()
three_leaf_asym = RankTree(children=[
unlabelled_leaf,
RankTree(children=[unlabelled_leaf, unlabelled_leaf]),
])
assert not three_leaf_asym.is_symmetrical()
six_leaf_sym = RankTree(children=[three_leaf_asym, three_leaf_asym])
assert six_leaf_sym.is_symmetrical()
def test_is_symmetrical(self):
unlabelled_leaf = RankTree(children=[])
self.assertTrue(unlabelled_leaf.is_symmetrical())
three_leaf_asym = RankTree(children=[
unlabelled_leaf,
RankTree(children=[unlabelled_leaf, unlabelled_leaf]),
])
self.assertFalse(three_leaf_asym.is_symmetrical())
six_leaf_sym = RankTree(children=[three_leaf_asym, three_leaf_asym])
self.assertTrue(six_leaf_sym.is_symmetrical())