| # |
| # Licensed to the Apache Software Foundation (ASF) under one |
| # or more contributor license agreements. See the NOTICE file |
| # distributed with this work for additional information |
| # regarding copyright ownership. The ASF licenses this file |
| # to you under the Apache License, Version 2.0 (the |
| # "License"); you may not use this file except in compliance |
| # with the License. You may obtain a copy of the License at |
| # |
| # http://www.apache.org/licenses/LICENSE-2.0 |
| # |
| # Unless required by applicable law or agreed to in writing, |
| # software distributed under the License is distributed on an |
| # "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| # KIND, either express or implied. See the License for the |
| # specific language governing permissions and limitations |
| # under the License. |
| # |
| import pytest |
| |
| from gremlin_python.process.traversal import Bytecode, P |
| from gremlin_python.process.graph_traversal import ( |
| GraphTraversalSource, GraphTraversal) |
| from gremlin_python.process.graph_traversal import __ as AnonymousTraversal |
| from gremlin_python.structure.graph import Graph |
| |
| __author__ = 'David M. Brown (davebshow@gmail.com)' |
| |
| |
| class SocialTraversal(GraphTraversal): |
| |
| def knows(self, person_name): |
| return self.out("knows").hasLabel("person").has("name", person_name) |
| |
| def youngestFriendsAge(self): |
| return self.out("knows").hasLabel("person").values("age").min() |
| |
| def createdAtLeast(self, number): |
| return self.outE("created").count().is_(P.gte(number)) |
| |
| class __(AnonymousTraversal): |
| |
| graph_traversal = SocialTraversal |
| |
| @classmethod |
| def knows(cls, *args): |
| return cls.graph_traversal(None, None, Bytecode()).knows(*args) |
| |
| @classmethod |
| def youngestFriendsAge(cls, *args): |
| return cls.graph_traversal(None, None, Bytecode()).youngestFriendsAge(*args) |
| |
| @classmethod |
| def createdAtLeast(cls, *args): |
| return cls.graph_traversal(None, None, Bytecode()).createdAtLeast(*args) |
| |
| |
| class SocialTraversalSource(GraphTraversalSource): |
| |
| def __init__(self, *args, **kwargs): |
| super(SocialTraversalSource, self).__init__(*args, **kwargs) |
| self.graph_traversal = SocialTraversal |
| |
| def persons(self, *args): |
| traversal = self.get_graph_traversal().V().hasLabel("person") |
| |
| if len(args) > 0: |
| traversal = traversal.has("name", P.within(*args)) |
| |
| return traversal |
| |
| |
| def test_dsl(remote_connection): |
| social = Graph().traversal(SocialTraversalSource).withRemote(remote_connection) |
| assert social.persons("marko").knows("josh").next() |
| assert social.persons("marko").youngestFriendsAge().next() == 27 |
| assert social.persons().count().next() == 4 |
| assert social.persons("marko", "josh").count().next() == 2 |
| assert social.persons().filter(__.createdAtLeast(2)).count().next() == 1 |