def test_incidentEdge(self):
v4 = Vertex("4", 200, 100)
v5 = Vertex("5", 100, 100)
e45 = Edge(v4, v5, 2)
e54 = Edge(v5, v4, 3)
v5.addInEdge(e45)
assert e45 == v5.getInEdge("4")
nose.tools.assert_raises(GraphError, v5.getInEdge, "40")
assert v5.hasInEdge("4")
assert not v5.hasInEdge("100")
