| # |
| # 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. |
| # |
| |
| """Fake datastore used for unit testing. |
| |
| For internal use only; no backwards-compatibility guarantees. |
| """ |
| |
| from __future__ import absolute_import |
| |
| import uuid |
| from builtins import range |
| |
| # Protect against environments where datastore library is not available. |
| # pylint: disable=wrong-import-order, wrong-import-position |
| try: |
| from google.cloud.proto.datastore.v1 import datastore_pb2 |
| from google.cloud.proto.datastore.v1 import query_pb2 |
| except ImportError: |
| pass |
| # pylint: enable=wrong-import-order, wrong-import-position |
| |
| |
| def create_run_query(entities, batch_size): |
| """A fake datastore run_query method that returns entities in batches. |
| |
| Note: the outer method is needed to make the `entities` and `batch_size` |
| available in the scope of fake_run_query method. |
| |
| Args: |
| entities: list of entities supposed to be contained in the datastore. |
| batch_size: the number of entities that run_query method returns in one |
| request. |
| """ |
| def run_query(req): |
| start = int(req.query.start_cursor) if req.query.start_cursor else 0 |
| # if query limit is less than batch_size, then only return that much. |
| count = min(batch_size, req.query.limit.value) |
| # cannot go more than the number of entities contained in datastore. |
| end = min(len(entities), start + count) |
| finish = False |
| # Finish reading when there are no more entities to return, |
| # or request query limit has been satisfied. |
| if end == len(entities) or count == req.query.limit.value: |
| finish = True |
| return create_response(entities[start:end], str(end), finish) |
| return run_query |
| |
| |
| def create_commit(mutations): |
| """A fake Datastore commit method that writes the mutations to a list. |
| |
| Args: |
| mutations: A list to write mutations to. |
| |
| Returns: |
| A fake Datastore commit method |
| """ |
| |
| def commit(req): |
| for mutation in req.mutations: |
| mutations.append(mutation) |
| |
| return commit |
| |
| |
| def create_response(entities, end_cursor, finish): |
| """Creates a query response for a given batch of scatter entities.""" |
| resp = datastore_pb2.RunQueryResponse() |
| if finish: |
| resp.batch.more_results = query_pb2.QueryResultBatch.NO_MORE_RESULTS |
| else: |
| resp.batch.more_results = query_pb2.QueryResultBatch.NOT_FINISHED |
| |
| resp.batch.end_cursor = end_cursor |
| for entity_result in entities: |
| resp.batch.entity_results.add().CopyFrom(entity_result) |
| |
| return resp |
| |
| |
| def create_entities(count, id_or_name=False): |
| """Creates a list of entities with random keys.""" |
| entities = [] |
| |
| for _ in range(count): |
| entity_result = query_pb2.EntityResult() |
| if id_or_name: |
| entity_result.entity.key.path.add().id = ( |
| uuid.uuid4().int & ((1 << 63) - 1)) |
| else: |
| entity_result.entity.key.path.add().name = str(uuid.uuid4()) |
| entities.append(entity_result) |
| |
| return entities |