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| <h1>Source code for apache_beam.testing.test_pipeline</h1><div class="highlight"><pre> |
| <span></span><span class="c1">#</span> |
| <span class="c1"># Licensed to the Apache Software Foundation (ASF) under one or more</span> |
| <span class="c1"># contributor license agreements. See the NOTICE file distributed with</span> |
| <span class="c1"># this work for additional information regarding copyright ownership.</span> |
| <span class="c1"># The ASF licenses this file to You under the Apache License, Version 2.0</span> |
| <span class="c1"># (the "License"); you may not use this file except in compliance with</span> |
| <span class="c1"># the License. You may obtain a copy of the License at</span> |
| <span class="c1">#</span> |
| <span class="c1"># http://www.apache.org/licenses/LICENSE-2.0</span> |
| <span class="c1">#</span> |
| <span class="c1"># Unless required by applicable law or agreed to in writing, software</span> |
| <span class="c1"># distributed under the License is distributed on an "AS IS" BASIS,</span> |
| <span class="c1"># WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.</span> |
| <span class="c1"># See the License for the specific language governing permissions and</span> |
| <span class="c1"># limitations under the License.</span> |
| <span class="c1">#</span> |
| |
| <span class="sd">"""Test Pipeline, a wrapper of Pipeline for test purpose"""</span> |
| |
| <span class="kn">import</span> <span class="nn">argparse</span> |
| <span class="kn">import</span> <span class="nn">shlex</span> |
| |
| <span class="kn">from</span> <span class="nn">nose.plugins.skip</span> <span class="k">import</span> <span class="n">SkipTest</span> |
| |
| <span class="kn">from</span> <span class="nn">apache_beam.internal</span> <span class="k">import</span> <span class="n">pickler</span> |
| <span class="kn">from</span> <span class="nn">apache_beam.options.pipeline_options</span> <span class="k">import</span> <span class="n">PipelineOptions</span> |
| <span class="kn">from</span> <span class="nn">apache_beam.pipeline</span> <span class="k">import</span> <span class="n">Pipeline</span> |
| <span class="kn">from</span> <span class="nn">apache_beam.runners.runner</span> <span class="k">import</span> <span class="n">PipelineState</span> |
| |
| <span class="n">__all__</span> <span class="o">=</span> <span class="p">[</span> |
| <span class="s1">'TestPipeline'</span><span class="p">,</span> |
| <span class="p">]</span> |
| |
| |
| <div class="viewcode-block" id="TestPipeline"><a class="viewcode-back" href="../../../apache_beam.testing.test_pipeline.html#apache_beam.testing.test_pipeline.TestPipeline">[docs]</a><span class="k">class</span> <span class="nc">TestPipeline</span><span class="p">(</span><span class="n">Pipeline</span><span class="p">):</span> |
| <span class="sd">""":class:`TestPipeline` class is used inside of Beam tests that can be</span> |
| <span class="sd"> configured to run against pipeline runner.</span> |
| |
| <span class="sd"> It has a functionality to parse arguments from command line and build pipeline</span> |
| <span class="sd"> options for tests who runs against a pipeline runner and utilizes resources</span> |
| <span class="sd"> of the pipeline runner. Those test functions are recommended to be tagged by</span> |
| <span class="sd"> ``@attr("ValidatesRunner")`` annotation.</span> |
| |
| <span class="sd"> In order to configure the test with customized pipeline options from command</span> |
| <span class="sd"> line, system argument ``--test-pipeline-options`` can be used to obtains a</span> |
| <span class="sd"> list of pipeline options. If no options specified, default value will be used.</span> |
| |
| <span class="sd"> For example, use following command line to execute all ValidatesRunner tests::</span> |
| |
| <span class="sd"> python setup.py nosetests -a ValidatesRunner \\</span> |
| <span class="sd"> --test-pipeline-options="--runner=DirectRunner \\</span> |
| <span class="sd"> --job_name=myJobName \\</span> |
| <span class="sd"> --num_workers=1"</span> |
| |
| <span class="sd"> For example, use assert_that for test validation::</span> |
| |
| <span class="sd"> pipeline = TestPipeline()</span> |
| <span class="sd"> pcoll = ...</span> |
| <span class="sd"> assert_that(pcoll, equal_to(...))</span> |
| <span class="sd"> pipeline.run()</span> |
| <span class="sd"> """</span> |
| |
| <span class="k">def</span> <span class="nf">__init__</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> |
| <span class="n">runner</span><span class="o">=</span><span class="kc">None</span><span class="p">,</span> |
| <span class="n">options</span><span class="o">=</span><span class="kc">None</span><span class="p">,</span> |
| <span class="n">argv</span><span class="o">=</span><span class="kc">None</span><span class="p">,</span> |
| <span class="n">is_integration_test</span><span class="o">=</span><span class="kc">False</span><span class="p">,</span> |
| <span class="n">blocking</span><span class="o">=</span><span class="kc">True</span><span class="p">):</span> |
| <span class="sd">"""Initialize a pipeline object for test.</span> |
| |
| <span class="sd"> Args:</span> |
| <span class="sd"> runner (~apache_beam.runners.runner.PipelineRunner): An object of type</span> |
| <span class="sd"> :class:`~apache_beam.runners.runner.PipelineRunner` that will be used</span> |
| <span class="sd"> to execute the pipeline. For registered runners, the runner name can be</span> |
| <span class="sd"> specified, otherwise a runner object must be supplied.</span> |
| <span class="sd"> options (~apache_beam.options.pipeline_options.PipelineOptions):</span> |
| <span class="sd"> A configured</span> |
| <span class="sd"> :class:`~apache_beam.options.pipeline_options.PipelineOptions`</span> |
| <span class="sd"> object containing arguments that should be used for running the</span> |
| <span class="sd"> pipeline job.</span> |
| <span class="sd"> argv (List[str]): A list of arguments (such as :data:`sys.argv`) to be</span> |
| <span class="sd"> used for building a</span> |
| <span class="sd"> :class:`~apache_beam.options.pipeline_options.PipelineOptions` object.</span> |
| <span class="sd"> This will only be used if argument **options** is :data:`None`.</span> |
| <span class="sd"> is_integration_test (bool): :data:`True` if the test is an integration</span> |
| <span class="sd"> test, :data:`False` otherwise.</span> |
| <span class="sd"> blocking (bool): Run method will wait until pipeline execution is</span> |
| <span class="sd"> completed.</span> |
| |
| <span class="sd"> Raises:</span> |
| <span class="sd"> ~exceptions.ValueError: if either the runner or options argument is not</span> |
| <span class="sd"> of the expected type.</span> |
| <span class="sd"> """</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">is_integration_test</span> <span class="o">=</span> <span class="n">is_integration_test</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">options_list</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">_parse_test_option_args</span><span class="p">(</span><span class="n">argv</span><span class="p">)</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">blocking</span> <span class="o">=</span> <span class="n">blocking</span> |
| <span class="k">if</span> <span class="n">options</span> <span class="ow">is</span> <span class="kc">None</span><span class="p">:</span> |
| <span class="n">options</span> <span class="o">=</span> <span class="n">PipelineOptions</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">options_list</span><span class="p">)</span> |
| <span class="nb">super</span><span class="p">(</span><span class="n">TestPipeline</span><span class="p">,</span> <span class="bp">self</span><span class="p">)</span><span class="o">.</span><span class="fm">__init__</span><span class="p">(</span><span class="n">runner</span><span class="p">,</span> <span class="n">options</span><span class="p">)</span> |
| |
| <div class="viewcode-block" id="TestPipeline.run"><a class="viewcode-back" href="../../../apache_beam.testing.test_pipeline.html#apache_beam.testing.test_pipeline.TestPipeline.run">[docs]</a> <span class="k">def</span> <span class="nf">run</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">test_runner_api</span><span class="o">=</span><span class="kc">True</span><span class="p">):</span> |
| <span class="n">result</span> <span class="o">=</span> <span class="nb">super</span><span class="p">(</span><span class="n">TestPipeline</span><span class="p">,</span> <span class="bp">self</span><span class="p">)</span><span class="o">.</span><span class="n">run</span><span class="p">(</span><span class="n">test_runner_api</span><span class="p">)</span> |
| <span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">blocking</span><span class="p">:</span> |
| <span class="n">state</span> <span class="o">=</span> <span class="n">result</span><span class="o">.</span><span class="n">wait_until_finish</span><span class="p">()</span> |
| <span class="k">assert</span> <span class="n">state</span> <span class="ow">in</span> <span class="p">(</span><span class="n">PipelineState</span><span class="o">.</span><span class="n">DONE</span><span class="p">,</span> <span class="n">PipelineState</span><span class="o">.</span><span class="n">CANCELLED</span><span class="p">),</span> \ |
| <span class="s2">"Pipeline execution failed."</span> |
| |
| <span class="k">return</span> <span class="n">result</span></div> |
| |
| <span class="k">def</span> <span class="nf">_parse_test_option_args</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">argv</span><span class="p">):</span> |
| <span class="sd">"""Parse value of command line argument: --test-pipeline-options to get</span> |
| <span class="sd"> pipeline options.</span> |
| |
| <span class="sd"> Args:</span> |
| <span class="sd"> argv: An iterable of command line arguments to be used. If not specified</span> |
| <span class="sd"> then sys.argv will be used as input for parsing arguments.</span> |
| |
| <span class="sd"> Returns:</span> |
| <span class="sd"> An argument list of options that can be parsed by argparser or directly</span> |
| <span class="sd"> build a pipeline option.</span> |
| <span class="sd"> """</span> |
| <span class="n">parser</span> <span class="o">=</span> <span class="n">argparse</span><span class="o">.</span><span class="n">ArgumentParser</span><span class="p">()</span> |
| <span class="n">parser</span><span class="o">.</span><span class="n">add_argument</span><span class="p">(</span><span class="s1">'--test-pipeline-options'</span><span class="p">,</span> |
| <span class="nb">type</span><span class="o">=</span><span class="nb">str</span><span class="p">,</span> |
| <span class="n">action</span><span class="o">=</span><span class="s1">'store'</span><span class="p">,</span> |
| <span class="n">help</span><span class="o">=</span><span class="s1">'only run tests providing service options'</span><span class="p">)</span> |
| <span class="n">known</span><span class="p">,</span> <span class="n">unused_argv</span> <span class="o">=</span> <span class="n">parser</span><span class="o">.</span><span class="n">parse_known_args</span><span class="p">(</span><span class="n">argv</span><span class="p">)</span> |
| |
| <span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">is_integration_test</span> <span class="ow">and</span> <span class="ow">not</span> <span class="n">known</span><span class="o">.</span><span class="n">test_pipeline_options</span><span class="p">:</span> |
| <span class="c1"># Skip integration test when argument '--test-pipeline-options' is not</span> |
| <span class="c1"># specified since nose calls integration tests when runs unit test by</span> |
| <span class="c1"># 'setup.py test'.</span> |
| <span class="k">raise</span> <span class="n">SkipTest</span><span class="p">(</span><span class="s1">'IT is skipped because --test-pipeline-options '</span> |
| <span class="s1">'is not specified'</span><span class="p">)</span> |
| |
| <span class="k">return</span> <span class="n">shlex</span><span class="o">.</span><span class="n">split</span><span class="p">(</span><span class="n">known</span><span class="o">.</span><span class="n">test_pipeline_options</span><span class="p">)</span> \ |
| <span class="k">if</span> <span class="n">known</span><span class="o">.</span><span class="n">test_pipeline_options</span> <span class="k">else</span> <span class="p">[]</span> |
| |
| <div class="viewcode-block" id="TestPipeline.get_full_options_as_args"><a class="viewcode-back" href="../../../apache_beam.testing.test_pipeline.html#apache_beam.testing.test_pipeline.TestPipeline.get_full_options_as_args">[docs]</a> <span class="k">def</span> <span class="nf">get_full_options_as_args</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="o">**</span><span class="n">extra_opts</span><span class="p">):</span> |
| <span class="sd">"""Get full pipeline options as an argument list.</span> |
| |
| <span class="sd"> Append extra pipeline options to existing option list if provided.</span> |
| <span class="sd"> Test verifier (if contains in extra options) should be pickled before</span> |
| <span class="sd"> appending, and will be unpickled later in the TestRunner.</span> |
| <span class="sd"> """</span> |
| <span class="n">options</span> <span class="o">=</span> <span class="nb">list</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">options_list</span><span class="p">)</span> |
| <span class="k">for</span> <span class="n">k</span><span class="p">,</span> <span class="n">v</span> <span class="ow">in</span> <span class="n">extra_opts</span><span class="o">.</span><span class="n">items</span><span class="p">():</span> |
| <span class="k">if</span> <span class="ow">not</span> <span class="n">v</span><span class="p">:</span> |
| <span class="k">continue</span> |
| <span class="k">elif</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">v</span><span class="p">,</span> <span class="nb">bool</span><span class="p">)</span> <span class="ow">and</span> <span class="n">v</span><span class="p">:</span> |
| <span class="n">options</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="s1">'--</span><span class="si">%s</span><span class="s1">'</span> <span class="o">%</span> <span class="n">k</span><span class="p">)</span> |
| <span class="k">elif</span> <span class="s1">'matcher'</span> <span class="ow">in</span> <span class="n">k</span><span class="p">:</span> |
| <span class="n">options</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="s1">'--</span><span class="si">%s</span><span class="s1">=</span><span class="si">%s</span><span class="s1">'</span> <span class="o">%</span> <span class="p">(</span><span class="n">k</span><span class="p">,</span> <span class="n">pickler</span><span class="o">.</span><span class="n">dumps</span><span class="p">(</span><span class="n">v</span><span class="p">)))</span> |
| <span class="k">else</span><span class="p">:</span> |
| <span class="n">options</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="s1">'--</span><span class="si">%s</span><span class="s1">=</span><span class="si">%s</span><span class="s1">'</span> <span class="o">%</span> <span class="p">(</span><span class="n">k</span><span class="p">,</span> <span class="n">v</span><span class="p">))</span> |
| <span class="k">return</span> <span class="n">options</span></div> |
| |
| <div class="viewcode-block" id="TestPipeline.get_option"><a class="viewcode-back" href="../../../apache_beam.testing.test_pipeline.html#apache_beam.testing.test_pipeline.TestPipeline.get_option">[docs]</a> <span class="k">def</span> <span class="nf">get_option</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">opt_name</span><span class="p">):</span> |
| <span class="sd">"""Get a pipeline option value by name</span> |
| |
| <span class="sd"> Args:</span> |
| <span class="sd"> opt_name: The name of the pipeline option.</span> |
| |
| <span class="sd"> Returns:</span> |
| <span class="sd"> None if option is not found in existing option list which is generated</span> |
| <span class="sd"> by parsing value of argument `test-pipeline-options`.</span> |
| <span class="sd"> """</span> |
| <span class="n">parser</span> <span class="o">=</span> <span class="n">argparse</span><span class="o">.</span><span class="n">ArgumentParser</span><span class="p">()</span> |
| <span class="n">opt_name</span> <span class="o">=</span> <span class="n">opt_name</span><span class="p">[:</span><span class="mi">2</span><span class="p">]</span> <span class="k">if</span> <span class="n">opt_name</span><span class="p">[:</span><span class="mi">2</span><span class="p">]</span> <span class="o">==</span> <span class="s1">'--'</span> <span class="k">else</span> <span class="n">opt_name</span> |
| <span class="c1"># Option name should start with '--' when it's used for parsing.</span> |
| <span class="n">parser</span><span class="o">.</span><span class="n">add_argument</span><span class="p">(</span><span class="s1">'--'</span> <span class="o">+</span> <span class="n">opt_name</span><span class="p">,</span> |
| <span class="nb">type</span><span class="o">=</span><span class="nb">str</span><span class="p">,</span> |
| <span class="n">action</span><span class="o">=</span><span class="s1">'store'</span><span class="p">)</span> |
| <span class="n">known</span><span class="p">,</span> <span class="n">_</span> <span class="o">=</span> <span class="n">parser</span><span class="o">.</span><span class="n">parse_known_args</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">options_list</span><span class="p">)</span> |
| <span class="k">return</span> <span class="nb">getattr</span><span class="p">(</span><span class="n">known</span><span class="p">,</span> <span class="n">opt_name</span><span class="p">)</span> <span class="k">if</span> <span class="nb">hasattr</span><span class="p">(</span><span class="n">known</span><span class="p">,</span> <span class="n">opt_name</span><span class="p">)</span> <span class="k">else</span> <span class="kc">None</span></div></div> |
| </pre></div> |
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