def Test_DAGStructure_VertexEdgeSetQueries(self):

        #multiple users so we can test this feature
        u1 = MyUser(user="******", key_name="Bill")
        u1.put()
        u2 = MyUser(user="******", key_name="Ted")
        u2.put()

        #first insert all known tags
        t1 = TagVertex(u1, "Tag1")
        t1.ttlCount = 1
        t1.put()
        t2 = TagVertex(u1, "Tag2")
        t2.ttlCount = 2
        t2.put()
        t3 = TagVertex(u1, "Tag3")
        t3.ttlCount = 3
        t3.put()
        t4 = TagVertex(u1, "Tag4")
        t4.ttlCount = 4
        t4.put()
        t5 = TagVertex(u1, "Tag5")
        t5.ttlCount = 5
        t5.put()
        t6 = TagVertex(u1, "Tag6")
        t6.ttlCount = 6
        t6.put()
        t1.AddEdge(t2, 11)
        t1.AddEdge(t3, 12)
        t2.AddEdge(t3, 13)
        t2.AddEdge(t4, 14)
        t2.AddEdge(t6, 15)
        t3.AddEdge(t4, 16)
        
        #some duplicate tags for the second user
        #(just noise - the calls here work from vertex references
        #and so should never see these 'other' tags
        t22 = TagVertex(u2, "Tag2")
        t22.ttlCount = 22
        t22.put()
        t33 = TagVertex(u2, "Tag3")
        t33.ttlCount = 33
        t33.put()
        t44 = TagVertex(u2, "Tag4")
        t44.ttlCount = 44
        t44.put()
        t22.AddEdge(t33, 13)
        t22.AddEdge(t44, 14)
        t33.AddEdge(t44, 16)

        # test getting the set of outgoing edges
        myEdges = t2.GetMyEdges()
        check.ok_(myEdges != None)
        check.ok_(len(myEdges) == 3)
        check.ok_(myEdges.has_key("Tag3"))
        check.ok_(myEdges.has_key("Tag4"))
        check.ok_(myEdges.has_key("Tag6"))
        check.ok_(myEdges["Tag3"].edgeCount == 13)
        check.ok_(myEdges["Tag4"].edgeCount == 14)
        check.ok_(myEdges["Tag6"].edgeCount == 15)
        
        #get the set of connected vertices recorded in a vertex
        myConectees = t3.GetMyAdjacentVertices()
        check.ok_(myConectees != None)
        check.ok_(len(myConectees) == 1)
        check.ok_(myConectees.has_key("Tag4"))
        
        #test getting the set of incoming edges
        otherConectees = t3.GetAdjacentVerticesRecordedElsewhere()
        check.ok_(otherConectees != None)
        check.ok_(len(otherConectees) == 2)
        check.ok_(otherConectees.has_key("Tag1"))
        check.ok_(otherConectees.has_key("Tag2"))

        #get the total set of connected vertices
        connectees = t3.GetAllAdjacentVertices()
        check.ok_(connectees != None)
        check.ok_(len(connectees) == 3)
        check.ok_(connectees.has_key("Tag1"))
        check.ok_(connectees.has_key("Tag2"))
        check.ok_(connectees.has_key("Tag4"))