def test_graph_add_vertices():
G = Graph([1, 2, 3], [(1, 2), (2, 3)])
G.add_vertices(4)
assert str(G) == "Graph on 4 vertices and 2 edges"
G.add_vertices(5, labels={5: Text("5")})
assert str(G) == "Graph on 5 vertices and 2 edges"
assert 5 in G._labels
assert 5 in G._vertex_config
G.add_vertices(6, 7, 8)
assert len(G.vertices) == 8
assert len(G._graph.nodes()) == 8
def test_graph_add_vertices(using_opengl_renderer):
G = Graph([1, 2, 3], [(1, 2), (2, 3)])
G.add_vertices(4)
assert len(G.vertices) == 4
assert len(G.edges) == 2
G.add_vertices(5, labels={5: Text("5")})
assert len(G.vertices) == 5
assert len(G.edges) == 2
assert 5 in G._labels
assert 5 in G._vertex_config
G.add_vertices(6, 7, 8)
assert len(G.vertices) == 8
assert len(G._graph.nodes()) == 8
def construct(self):
G = Graph([], [], labels=True)
G.scale(0.45)
G.add_vertices(1, positions={1: [0, 0, 0]}, labels=True)
self.play(Create(G))
self.wait(10)