sdks/python/apache_beam/examples/wordcount_debugging_test.py

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"""Test for the debugging wordcount example."""

# pytype: skip-file

import logging
import re
import unittest
import uuid

import pytest

from apache_beam.examples import wordcount_debugging
from apache_beam.testing.test_pipeline import TestPipeline
from apache_beam.testing.test_utils import create_file
from apache_beam.testing.test_utils import read_files_from_pattern


@pytest.mark.examples_postcommit
class WordCountDebuggingTest(unittest.TestCase):

  SAMPLE_TEXT = 'xx yy Flourish\n zz Flourish Flourish stomach\n aa\n bb cc dd'

  def get_results(self, temp_path):
    results = []
    lines = read_files_from_pattern(temp_path + '.result*').splitlines()
    for line in lines:
      match = re.search(r'([A-Za-z]+): ([0-9]+)', line)
      if match is not None:
        results.append((match.group(1), int(match.group(2))))
    return results

  def test_basics(self):
    test_pipeline = TestPipeline(is_integration_test=True)
    # Setup the files with expected content.
    temp_location = test_pipeline.get_option('temp_location')
    temp_path = '/'.join([temp_location, str(uuid.uuid4())])
    input = create_file('/'.join([temp_path, 'input.txt']), self.SAMPLE_TEXT)
    extra_opts = {'input': input, 'output': '%s.result' % temp_path}
    expected_words = [('Flourish', 3), ('stomach', 1)]
    wordcount_debugging.run(
        test_pipeline.get_full_options_as_args(**extra_opts),
        save_main_session=False)

    # Parse result file and compare.
    results = self.get_results(temp_path)
    self.assertEqual(sorted(results), sorted(expected_words))


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