def test_out_edges(self):
g = Graph([v, w, x], [vw, vx])
assert sorted(g.out_edges(v)) == sorted([vw, vx])
assert g.out_edges(w) == [vw, ]
assert g.out_edges(x) == [vx, ]
def test_out_edges_none(self):
g = Graph()
assert [] == g.out_edges(v)