def test_graph_remove_edges():
G = Graph([1, 2, 3, 4, 5], [(1, 2), (2, 3), (3, 4), (4, 5), (1, 5)])
removed_mobjects = G.remove_edges((1, 2))
assert str(removed_mobjects.submobjects) == "[Line]"
assert str(G) == "Graph on 5 vertices and 4 edges"
assert set(G.edges.keys()) == {(2, 3), (3, 4), (4, 5), (1, 5)}
assert set(G._graph.edges()) == set(G.edges.keys())
removed_mobjects = G.remove_edges((2, 3), (3, 4), (4, 5), (5, 1))
assert len(removed_mobjects) == 4
assert str(G) == "Graph on 5 vertices and 0 edges"
assert set(G._graph.edges()) == set()
assert set(G.edges.keys()) == set()
def test_graph_remove_edges(using_opengl_renderer):
G = Graph([1, 2, 3, 4, 5], [(1, 2), (2, 3), (3, 4), (4, 5), (1, 5)])
removed_mobjects = G.remove_edges((1, 2))
assert isinstance(removed_mobjects.submobjects[0], Line)
assert len(G.vertices) == 5
assert len(G.edges) == 4
assert set(G.edges.keys()) == {(2, 3), (3, 4), (4, 5), (1, 5)}
assert set(G._graph.edges()) == set(G.edges.keys())
removed_mobjects = G.remove_edges((2, 3), (3, 4), (4, 5), (5, 1))
assert len(removed_mobjects) == 4
assert len(G.vertices) == 5
assert len(G.edges) == 0
assert set(G._graph.edges()) == set()
assert set(G.edges.keys()) == set()