| # |
| # 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. |
| # |
| |
| """Test for the estimate_pi example.""" |
| |
| from __future__ import absolute_import |
| |
| import logging |
| import unittest |
| |
| from apache_beam.examples.complete import estimate_pi |
| from apache_beam.testing.test_pipeline import TestPipeline |
| from apache_beam.testing.util import BeamAssertException |
| from apache_beam.testing.util import assert_that |
| |
| |
| def in_between(lower, upper): |
| def _in_between(actual): |
| _, _, estimate = actual[0] |
| if estimate < lower or estimate > upper: |
| raise BeamAssertException( |
| 'Failed assert: %f not in [%f, %f]' % (estimate, lower, upper)) |
| return _in_between |
| |
| |
| class EstimatePiTest(unittest.TestCase): |
| |
| def test_basics(self): |
| with TestPipeline() as p: |
| result = p | 'Estimate' >> estimate_pi.EstimatePiTransform(5000) |
| |
| # Note: Probabilistically speaking this test can fail with a probability |
| # that is very small (VERY) given that we run at least 500 thousand |
| # trials. |
| assert_that(result, in_between(3.125, 3.155)) |
| |
| |
| if __name__ == '__main__': |
| logging.getLogger().setLevel(logging.INFO) |
| unittest.main() |