def test_graph_can_be_initialized_with_another_graph():
ng = Graph(g)
for vid in ng:
assert vid in g
for eid in ng.edges():
assert eid in g
assert ng.source(eid) == g.source(eid)
assert ng.target(eid) == g.target(eid)
def test_pg_can_be_extended_with_normal_graph():
sg = Graph()
for i in range(10):
sg.add_vertex(i)
for i in range(9):
sg.add_edge(i, i + 1, i)
old_len = len(g)
old_nb_vprop = len(tuple(g.vertex_property_names()))
old_nb_eprop = len(tuple(g.edge_property_names()))
old_nb_gprop = len(tuple(g.graph_property_names()))
old_len_vprop = len(g.vertex_property("prop"))
old_len_eprop = len(g.edge_property("prop"))
g.extend(sg)
assert len(g) == old_len + len(sg)
assert len(tuple(g.vertex_property_names())) == old_nb_vprop
assert len(tuple(g.edge_property_names())) == old_nb_eprop
assert len(tuple(g.graph_property_names())) == old_nb_gprop
assert len(g.vertex_property("prop")) == old_len_vprop
assert len(g.edge_property("prop")) == old_len_eprop
