def test_errors():
g = graph05()
try:
len(g)
raise AssertionError
except ValueError:
assert True
try:
g.edges(from_node=1, to_node=1)
raise AssertionError
except ValueError:
assert True
try:
g.edges(path=[1])
raise AssertionError
except ValueError:
assert True
try:
g.edges(path="this")
raise AssertionError
except ValueError:
assert True
e = g.edges(from_node=77)
assert e == []
def test_copy():
g = graph05()
g2 = g.copy()
assert set(g.edges()) == set(g2.edges())
assert g == g2, "testing == operator failed"
g2.add_node(1, "this")
g3 = Graph(from_list=g.to_list())
assert g2 != g3
g2.add_node(1)
assert g2 == g3
def test_delitem():
g = graph05()
try:
g.__delitem__(key=1)
assert False
except ValueError:
assert True
g.del_edge(node1=0, node2=1)
v = g.edge(0, 1)
if v is not None:
raise ValueError
v = g.edge(0, 1, default=44)
if v != 44:
raise ValueError
def test_degree_of_separation():
g = graph05()
assert g.degree_of_separation(0, 10) == 3
def test_dfs_03():
g = graph05()
path = g.depth_first_search(0, 10)
assert path == [0, 2, 3, 9, 10]
assert g.has_path(path)
def test_copy():
g = graph05()
g2 = g.__copy__()
assert set(g.edges()) == set(g2.edges())
