github.com/apache/beam/sdks/v2@v2.48.2/python/apache_beam/examples/complete/estimate_pi_test.py (about)

     1  #
     2  # Licensed to the Apache Software Foundation (ASF) under one or more
     3  # contributor license agreements.  See the NOTICE file distributed with
     4  # this work for additional information regarding copyright ownership.
     5  # The ASF licenses this file to You under the Apache License, Version 2.0
     6  # (the "License"); you may not use this file except in compliance with
     7  # the License.  You may obtain a copy of the License at
     8  #
     9  #    http://www.apache.org/licenses/LICENSE-2.0
    10  #
    11  # Unless required by applicable law or agreed to in writing, software
    12  # distributed under the License is distributed on an "AS IS" BASIS,
    13  # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    14  # See the License for the specific language governing permissions and
    15  # limitations under the License.
    16  #
    17  
    18  """Test for the estimate_pi example."""
    19  
    20  # pytype: skip-file
    21  
    22  import logging
    23  import unittest
    24  
    25  from apache_beam.examples.complete import estimate_pi
    26  from apache_beam.testing.test_pipeline import TestPipeline
    27  from apache_beam.testing.util import BeamAssertException
    28  from apache_beam.testing.util import assert_that
    29  
    30  
    31  def in_between(lower, upper):
    32    def _in_between(actual):
    33      _, _, estimate = actual[0]
    34      if estimate < lower or estimate > upper:
    35        raise BeamAssertException(
    36            'Failed assert: %f not in [%f, %f]' % (estimate, lower, upper))
    37  
    38    return _in_between
    39  
    40  
    41  class EstimatePiTest(unittest.TestCase):
    42    def test_basics(self):
    43      with TestPipeline() as p:
    44        result = p | 'Estimate' >> estimate_pi.EstimatePiTransform(5000)
    45  
    46        # Note: Probabilistically speaking this test can fail with a probability
    47        # that is very small (VERY) given that we run at least 500 thousand
    48        # trials.
    49        assert_that(result, in_between(3.125, 3.155))
    50  
    51  
    52  if __name__ == '__main__':
    53    logging.getLogger().setLevel(logging.INFO)
    54    unittest.main()