def test_update(nodes):
"""Test update node attributes."""
v, w = nodes
vw = Edge(v, w, length=5)
assert vw['length'] == 5
vw.update(length=10, capacity=6)
assert vw['length'] == 10
assert vw['capacity'] == 6
def create_edges(pathpy=True, iterations=1000):
""" Create nodes without attributes. """
a = Node('a')
b = Node('b')
if pathpy:
for i in range(iterations):
e = Edge(a, b)
else:
for i in range(iterations):
e = {}
e.update(uid=None, v=a, w=b, nodes=set())
e['nodes'].add(a)
e['nodes'].add(b)
return True