def test_size(self):
assert 0 == Graph().size()
assert 1 == Graph([v, w], [vw, ]).size()
print('hi')
for n in range(8):
print(n)
g = Graph(make_vertices(n))
g.add_all_edges()
assert (n * (n - 1)) // 2 == g.size()
def test_make_vertices():
assert len(make_vertices(1)) == 1
assert len(make_vertices(4)) == 4
for v in make_vertices(2):
assert isinstance(v, Vertex)
def test_order(self):
assert 0 == Graph().order()
assert 1 == Graph([v, ]).order()
assert 4 == Graph([v, w, x, y]).order()
g = Graph(make_vertices(10))
assert 10 == g.order()
