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#    http://www.apache.org/licenses/LICENSE-2.0
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"""An integration test for datastore_write_it_pipeline

This test creates entities and writes them to Cloud Datastore. Subsequently,
these entities are read from Cloud Datastore, compared to the expected value
for the entity, and deleted.

There is no output; instead, we use `assert_that` transform to verify the
results in the pipeline.
"""

from __future__ import absolute_import

import logging
import random
import unittest
from datetime import datetime

from hamcrest.core.core.allof import all_of
from nose.plugins.attrib import attr

from apache_beam.testing.pipeline_verifiers import PipelineStateMatcher
from apache_beam.testing.test_pipeline import TestPipeline

try:
  from apache_beam.io.gcp.datastore.v1new import datastore_write_it_pipeline
# TODO(BEAM-4543): Remove TypeError once googledatastore dependency is removed.
except (ImportError, TypeError):
  datastore_write_it_pipeline = None


class DatastoreWriteIT(unittest.TestCase):

  NUM_ENTITIES = 1001
  LIMIT = 500

  def run_datastore_write(self, limit=None):
    test_pipeline = TestPipeline(is_integration_test=True)
    current_time = datetime.now().strftime("%m%d%H%M%S")
    seed = random.randint(0, 100000)
    kind = 'testkind%s%d' % (current_time, seed)
    pipeline_verifiers = [PipelineStateMatcher()]
    extra_opts = {'kind': kind,
                  'num_entities': self.NUM_ENTITIES,
                  'on_success_matcher': all_of(*pipeline_verifiers)}
    if limit is not None:
      extra_opts['limit'] = limit

    datastore_write_it_pipeline.run(test_pipeline.get_full_options_as_args(
        **extra_opts))

  @attr('IT')
  @unittest.skipIf(datastore_write_it_pipeline is None,
                   'GCP dependencies are not installed')
  def test_datastore_write_limit(self):
    self.run_datastore_write(limit=self.LIMIT)


if __name__ == '__main__':
  logging.getLogger().setLevel(logging.INFO)
  unittest.main()
