sdks/python/apache_beam/utils/counters_test.py

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# this work for additional information regarding copyright ownership.
# The ASF licenses this file to You under the Apache License, Version 2.0
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#    http://www.apache.org/licenses/LICENSE-2.0
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"""Unit tests for counters and counter names."""

from __future__ import absolute_import

import unittest

from apache_beam.utils import counters
from apache_beam.utils.counters import CounterName


class CounterNameTest(unittest.TestCase):

  def test_name_string_representation(self):
    counter_name = CounterName('counter_name',
                               'stage_name',
                               'step_name')

    # This string representation is utilized by the worker to report progress.
    # Change only if the worker code has also been changed.
    self.assertEqual('stage_name-step_name-counter_name', str(counter_name))
    self.assertIn('<CounterName<stage_name-step_name-counter_name> at 0x',
                  repr(counter_name))

  def test_equal_objects(self):
    self.assertEqual(CounterName('counter_name',
                                 'stage_name',
                                 'step_name'),
                     CounterName('counter_name',
                                 'stage_name',
                                 'step_name'))
    self.assertNotEqual(CounterName('counter_name',
                                    'stage_name',
                                    'step_name'),
                        CounterName('counter_name',
                                    'stage_name',
                                    'step_nam'))

    # Testing objects with an IOTarget.
    self.assertEqual(CounterName('counter_name',
                                 'stage_name',
                                 'step_name',
                                 io_target=counters.side_input_id(1, 's9')),
                     CounterName('counter_name',
                                 'stage_name',
                                 'step_name',
                                 io_target=counters.side_input_id(1, 's9')))
    self.assertNotEqual(CounterName('counter_name',
                                    'stage_name',
                                    'step_name',
                                    io_target=counters.side_input_id(1, 's')),
                        CounterName('counter_name',
                                    'stage_name',
                                    'step_name',
                                    io_target=counters.side_input_id(1, 's9')))

  def test_hash_two_objects(self):
    self.assertEqual(hash(CounterName('counter_name',
                                      'stage_name',
                                      'step_name')),
                     hash(CounterName('counter_name',
                                      'stage_name',
                                      'step_name')))
    self.assertNotEqual(hash(CounterName('counter_name',
                                         'stage_name',
                                         'step_name')),
                        hash(CounterName('counter_name',
                                         'stage_name',
                                         'step_nam')))


if __name__ == '__main__':
  unittest.main()