def test_is_connected_graph(self):
g = SimpleGraph(4)
g.connect(1, 2)
g.connect(3, 4)
assert not g.is_connected_graph()
g.connect(2, 3)
assert g.is_connected_graph()
def test_connect(self):
g = SimpleGraph(8)
n1 = 1
n2 = 2
g.connect(n1, n2)
assert g.is_connected(n1, n2)
assert g.is_connected(n2, n1)
g.disconnect(n1, n2)
assert not g.is_connected(n1, n2)
assert not g.is_connected(n2, n1)