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<section id="module-apache_beam.testing.test_utils">
<span id="apache-beam-testing-test-utils-module"></span><h1>apache_beam.testing.test_utils module<a class="headerlink" href="#module-apache_beam.testing.test_utils" title="Link to this heading"></a></h1>
<p>Utility methods for testing</p>
<p>For internal use only; no backwards-compatibility guarantees.</p>
<dl class="py class">
<dt class="sig sig-object py" id="apache_beam.testing.test_utils.TempDir">
<em class="property"><span class="pre">class</span><span class="w"> </span></em><span class="sig-prename descclassname"><span class="pre">apache_beam.testing.test_utils.</span></span><span class="sig-name descname"><span class="pre">TempDir</span></span><a class="reference internal" href="_modules/apache_beam/testing/test_utils.html#TempDir"><span class="viewcode-link"><span class="pre">[source]</span></span></a><a class="headerlink" href="#apache_beam.testing.test_utils.TempDir" title="Link to this definition"></a></dt>
<dd><p>Bases: <a class="reference external" href="https://docs.python.org/3/library/functions.html#object" title="(in Python v3.13)"><code class="xref py py-class docutils literal notranslate"><span class="pre">object</span></code></a></p>
<p>Context Manager to create and clean-up a temporary directory.</p>
<dl class="py method">
<dt class="sig sig-object py" id="apache_beam.testing.test_utils.TempDir.get_path">
<span class="sig-name descname"><span class="pre">get_path</span></span><span class="sig-paren">(</span><span class="sig-paren">)</span><a class="reference internal" href="_modules/apache_beam/testing/test_utils.html#TempDir.get_path"><span class="viewcode-link"><span class="pre">[source]</span></span></a><a class="headerlink" href="#apache_beam.testing.test_utils.TempDir.get_path" title="Link to this definition"></a></dt>
<dd><p>Returns the path to the temporary directory.</p>
</dd></dl>
<dl class="py method">
<dt class="sig sig-object py" id="apache_beam.testing.test_utils.TempDir.create_temp_file">
<span class="sig-name descname"><span class="pre">create_temp_file</span></span><span class="sig-paren">(</span><em class="sig-param"><span class="n"><span class="pre">suffix</span></span><span class="o"><span class="pre">=</span></span><span class="default_value"><span class="pre">''</span></span></em>, <em class="sig-param"><span class="n"><span class="pre">lines</span></span><span class="o"><span class="pre">=</span></span><span class="default_value"><span class="pre">None</span></span></em><span class="sig-paren">)</span><a class="reference internal" href="_modules/apache_beam/testing/test_utils.html#TempDir.create_temp_file"><span class="viewcode-link"><span class="pre">[source]</span></span></a><a class="headerlink" href="#apache_beam.testing.test_utils.TempDir.create_temp_file" title="Link to this definition"></a></dt>
<dd><p>Creates a temporary file in the temporary directory.</p>
<dl class="field-list simple">
<dt class="field-odd">Parameters<span class="colon">:</span></dt>
<dd class="field-odd"><ul class="simple">
<li><p><strong>suffix</strong> (<a class="reference external" href="https://docs.python.org/3/library/stdtypes.html#str" title="(in Python v3.13)"><em>str</em></a>) – The filename suffix of the temporary file (e.g. ‘.txt’)</p></li>
<li><p><strong>lines</strong> (<em>List</em><em>[</em><a class="reference external" href="https://docs.python.org/3/library/stdtypes.html#str" title="(in Python v3.13)"><em>str</em></a><em>]</em>) – A list of lines that will be written to the temporary
file.</p></li>
</ul>
</dd>
<dt class="field-even">Returns<span class="colon">:</span></dt>
<dd class="field-even"><p>The name of the temporary file created.</p>
</dd>
</dl>
</dd></dl>
</dd></dl>
<dl class="py function">
<dt class="sig sig-object py" id="apache_beam.testing.test_utils.compute_hash">
<span class="sig-prename descclassname"><span class="pre">apache_beam.testing.test_utils.</span></span><span class="sig-name descname"><span class="pre">compute_hash</span></span><span class="sig-paren">(</span><em class="sig-param"><span class="n"><span class="pre">content</span></span></em>, <em class="sig-param"><span class="n"><span class="pre">hashing_alg</span></span><span class="o"><span class="pre">=</span></span><span class="default_value"><span class="pre">'sha1'</span></span></em><span class="sig-paren">)</span><a class="reference internal" href="_modules/apache_beam/testing/test_utils.html#compute_hash"><span class="viewcode-link"><span class="pre">[source]</span></span></a><a class="headerlink" href="#apache_beam.testing.test_utils.compute_hash" title="Link to this definition"></a></dt>
<dd><p>Compute a hash value of a list of objects by hashing their string
representations.</p>
</dd></dl>
<dl class="py function">
<dt class="sig sig-object py" id="apache_beam.testing.test_utils.patch_retry">
<span class="sig-prename descclassname"><span class="pre">apache_beam.testing.test_utils.</span></span><span class="sig-name descname"><span class="pre">patch_retry</span></span><span class="sig-paren">(</span><em class="sig-param"><span class="n"><span class="pre">testcase</span></span></em>, <em class="sig-param"><span class="n"><span class="pre">module</span></span></em><span class="sig-paren">)</span><a class="reference internal" href="_modules/apache_beam/testing/test_utils.html#patch_retry"><span class="viewcode-link"><span class="pre">[source]</span></span></a><a class="headerlink" href="#apache_beam.testing.test_utils.patch_retry" title="Link to this definition"></a></dt>
<dd><p>A function to patch retry module to use mock clock and logger.</p>
<p>Clock and logger that defined in retry decorator will be replaced in test
in order to skip sleep phase when retry happens.</p>
<dl class="field-list simple">
<dt class="field-odd">Parameters<span class="colon">:</span></dt>
<dd class="field-odd"><ul class="simple">
<li><p><strong>testcase</strong> – An instance of unittest.TestCase that calls this function to
patch retry module.</p></li>
<li><p><strong>module</strong> – The module that uses retry and need to be replaced with mock
clock and logger in test.</p></li>
</ul>
</dd>
</dl>
</dd></dl>
<dl class="py function">
<dt class="sig sig-object py" id="apache_beam.testing.test_utils.delete_files">
<span class="sig-prename descclassname"><span class="pre">apache_beam.testing.test_utils.</span></span><span class="sig-name descname"><span class="pre">delete_files</span></span><span class="sig-paren">(</span><em class="sig-param"><span class="n"><span class="pre">file_paths</span></span></em><span class="sig-paren">)</span><a class="reference internal" href="_modules/apache_beam/testing/test_utils.html#delete_files"><span class="viewcode-link"><span class="pre">[source]</span></span></a><a class="headerlink" href="#apache_beam.testing.test_utils.delete_files" title="Link to this definition"></a></dt>
<dd><p>A function to clean up files or directories using <code class="docutils literal notranslate"><span class="pre">FileSystems</span></code>.</p>
<p>Glob is supported in file path and directories will be deleted recursively.</p>
<dl class="field-list simple">
<dt class="field-odd">Parameters<span class="colon">:</span></dt>
<dd class="field-odd"><p><strong>file_paths</strong> – A list of strings contains file paths or directories.</p>
</dd>
</dl>
</dd></dl>
<dl class="py function">
<dt class="sig sig-object py" id="apache_beam.testing.test_utils.cleanup_subscriptions">
<span class="sig-prename descclassname"><span class="pre">apache_beam.testing.test_utils.</span></span><span class="sig-name descname"><span class="pre">cleanup_subscriptions</span></span><span class="sig-paren">(</span><em class="sig-param"><span class="n"><span class="pre">sub_client</span></span></em>, <em class="sig-param"><span class="n"><span class="pre">subs</span></span></em><span class="sig-paren">)</span><a class="reference internal" href="_modules/apache_beam/testing/test_utils.html#cleanup_subscriptions"><span class="viewcode-link"><span class="pre">[source]</span></span></a><a class="headerlink" href="#apache_beam.testing.test_utils.cleanup_subscriptions" title="Link to this definition"></a></dt>
<dd><p>Cleanup PubSub subscriptions if exist.</p>
</dd></dl>
<dl class="py function">
<dt class="sig sig-object py" id="apache_beam.testing.test_utils.cleanup_topics">
<span class="sig-prename descclassname"><span class="pre">apache_beam.testing.test_utils.</span></span><span class="sig-name descname"><span class="pre">cleanup_topics</span></span><span class="sig-paren">(</span><em class="sig-param"><span class="n"><span class="pre">pub_client</span></span></em>, <em class="sig-param"><span class="n"><span class="pre">topics</span></span></em><span class="sig-paren">)</span><a class="reference internal" href="_modules/apache_beam/testing/test_utils.html#cleanup_topics"><span class="viewcode-link"><span class="pre">[source]</span></span></a><a class="headerlink" href="#apache_beam.testing.test_utils.cleanup_topics" title="Link to this definition"></a></dt>
<dd><p>Cleanup PubSub topics if exist.</p>
</dd></dl>
<dl class="py class">
<dt class="sig sig-object py" id="apache_beam.testing.test_utils.PullResponseMessage">
<em class="property"><span class="pre">class</span><span class="w"> </span></em><span class="sig-prename descclassname"><span class="pre">apache_beam.testing.test_utils.</span></span><span class="sig-name descname"><span class="pre">PullResponseMessage</span></span><span class="sig-paren">(</span><em class="sig-param"><span class="n"><span class="pre">data</span></span></em>, <em class="sig-param"><span class="n"><span class="pre">attributes</span></span><span class="o"><span class="pre">=</span></span><span class="default_value"><span class="pre">None</span></span></em>, <em class="sig-param"><span class="n"><span class="pre">publish_time_secs</span></span><span class="o"><span class="pre">=</span></span><span class="default_value"><span class="pre">None</span></span></em>, <em class="sig-param"><span class="n"><span class="pre">publish_time_nanos</span></span><span class="o"><span class="pre">=</span></span><span class="default_value"><span class="pre">None</span></span></em>, <em class="sig-param"><span class="n"><span class="pre">ack_id</span></span><span class="o"><span class="pre">=</span></span><span class="default_value"><span class="pre">None</span></span></em><span class="sig-paren">)</span><a class="reference internal" href="_modules/apache_beam/testing/test_utils.html#PullResponseMessage"><span class="viewcode-link"><span class="pre">[source]</span></span></a><a class="headerlink" href="#apache_beam.testing.test_utils.PullResponseMessage" title="Link to this definition"></a></dt>
<dd><p>Bases: <a class="reference external" href="https://docs.python.org/3/library/functions.html#object" title="(in Python v3.13)"><code class="xref py py-class docutils literal notranslate"><span class="pre">object</span></code></a></p>
<p>Data representing a pull request response.</p>
<p>Utility class for <code class="docutils literal notranslate"><span class="pre">create_pull_response</span></code>.</p>
</dd></dl>
<dl class="py function">
<dt class="sig sig-object py" id="apache_beam.testing.test_utils.create_pull_response">
<span class="sig-prename descclassname"><span class="pre">apache_beam.testing.test_utils.</span></span><span class="sig-name descname"><span class="pre">create_pull_response</span></span><span class="sig-paren">(</span><em class="sig-param"><span class="n"><span class="pre">responses</span></span></em><span class="sig-paren">)</span><a class="reference internal" href="_modules/apache_beam/testing/test_utils.html#create_pull_response"><span class="viewcode-link"><span class="pre">[source]</span></span></a><a class="headerlink" href="#apache_beam.testing.test_utils.create_pull_response" title="Link to this definition"></a></dt>
<dd><p>Create an instance of <code class="docutils literal notranslate"><span class="pre">google.cloud.pubsub.types.ReceivedMessage</span></code>.</p>
<p>Used to simulate the response from pubsub.SubscriberClient().pull().</p>
<dl class="field-list simple">
<dt class="field-odd">Parameters<span class="colon">:</span></dt>
<dd class="field-odd"><p><strong>responses</strong> – list of <code class="docutils literal notranslate"><span class="pre">PullResponseMessage</span></code></p>
</dd>
<dt class="field-even">Returns<span class="colon">:</span></dt>
<dd class="field-even"><p>An instance of <code class="docutils literal notranslate"><span class="pre">google.cloud.pubsub.types.PullResponse</span></code> populated with
responses.</p>
</dd>
</dl>
</dd></dl>
<dl class="py function">
<dt class="sig sig-object py" id="apache_beam.testing.test_utils.create_file">
<span class="sig-prename descclassname"><span class="pre">apache_beam.testing.test_utils.</span></span><span class="sig-name descname"><span class="pre">create_file</span></span><span class="sig-paren">(</span><em class="sig-param"><span class="n"><span class="pre">path</span></span></em>, <em class="sig-param"><span class="n"><span class="pre">contents</span></span></em><span class="sig-paren">)</span><a class="reference internal" href="_modules/apache_beam/testing/test_utils.html#create_file"><span class="viewcode-link"><span class="pre">[source]</span></span></a><a class="headerlink" href="#apache_beam.testing.test_utils.create_file" title="Link to this definition"></a></dt>
<dd><p>Create a file to use as input to test pipelines</p>
</dd></dl>
<dl class="py function">
<dt class="sig sig-object py" id="apache_beam.testing.test_utils.read_files_from_pattern">
<span class="sig-prename descclassname"><span class="pre">apache_beam.testing.test_utils.</span></span><span class="sig-name descname"><span class="pre">read_files_from_pattern</span></span><span class="sig-paren">(</span><em class="sig-param"><span class="n"><span class="pre">file_pattern</span></span></em><span class="sig-paren">)</span><a class="reference internal" href="_modules/apache_beam/testing/test_utils.html#read_files_from_pattern"><span class="viewcode-link"><span class="pre">[source]</span></span></a><a class="headerlink" href="#apache_beam.testing.test_utils.read_files_from_pattern" title="Link to this definition"></a></dt>
<dd><p>Reads the files that match a pattern</p>
</dd></dl>
<dl class="py class">
<dt class="sig sig-object py" id="apache_beam.testing.test_utils.LCGenerator">
<em class="property"><span class="pre">class</span><span class="w"> </span></em><span class="sig-prename descclassname"><span class="pre">apache_beam.testing.test_utils.</span></span><span class="sig-name descname"><span class="pre">LCGenerator</span></span><span class="sig-paren">(</span><em class="sig-param"><span class="n"><span class="pre">a</span></span><span class="o"><span class="pre">=</span></span><span class="default_value"><span class="pre">25214903917</span></span></em>, <em class="sig-param"><span class="n"><span class="pre">c</span></span><span class="o"><span class="pre">=</span></span><span class="default_value"><span class="pre">11</span></span></em>, <em class="sig-param"><span class="n"><span class="pre">bits</span></span><span class="o"><span class="pre">=</span></span><span class="default_value"><span class="pre">48</span></span></em><span class="sig-paren">)</span><a class="reference internal" href="_modules/apache_beam/testing/test_utils.html#LCGenerator"><span class="viewcode-link"><span class="pre">[source]</span></span></a><a class="headerlink" href="#apache_beam.testing.test_utils.LCGenerator" title="Link to this definition"></a></dt>
<dd><p>Bases: <a class="reference external" href="https://docs.python.org/3/library/functions.html#object" title="(in Python v3.13)"><code class="xref py py-class docutils literal notranslate"><span class="pre">object</span></code></a></p>
<p>A pure Python implementation of linear congruential generator.</p>
<dl class="py method">
<dt class="sig sig-object py" id="apache_beam.testing.test_utils.LCGenerator.seed">
<span class="sig-name descname"><span class="pre">seed</span></span><span class="sig-paren">(</span><em class="sig-param"><span class="n"><span class="pre">seed</span></span></em><span class="sig-paren">)</span><a class="reference internal" href="_modules/apache_beam/testing/test_utils.html#LCGenerator.seed"><span class="viewcode-link"><span class="pre">[source]</span></span></a><a class="headerlink" href="#apache_beam.testing.test_utils.LCGenerator.seed" title="Link to this definition"></a></dt>
<dd><p>Set the seed for the generator.</p>
</dd></dl>
<dl class="py method">
<dt class="sig sig-object py" id="apache_beam.testing.test_utils.LCGenerator.seed_jdk">
<span class="sig-name descname"><span class="pre">seed_jdk</span></span><span class="sig-paren">(</span><em class="sig-param"><span class="n"><span class="pre">seed</span></span></em><span class="sig-paren">)</span><a class="reference internal" href="_modules/apache_beam/testing/test_utils.html#LCGenerator.seed_jdk"><span class="viewcode-link"><span class="pre">[source]</span></span></a><a class="headerlink" href="#apache_beam.testing.test_utils.LCGenerator.seed_jdk" title="Link to this definition"></a></dt>
<dd><p>Set the seed in the way equivalent to java.util.Random.seed.</p>
<p>This method provide a JDK equivalent random generator. Note that the JDK
implementation has a known issue that is close seed generating close first
pseudo-random number.</p>
</dd></dl>
<dl class="py method">
<dt class="sig sig-object py" id="apache_beam.testing.test_utils.LCGenerator.next_int">
<span class="sig-name descname"><span class="pre">next_int</span></span><span class="sig-paren">(</span><span class="sig-paren">)</span><a class="reference internal" href="_modules/apache_beam/testing/test_utils.html#LCGenerator.next_int"><span class="viewcode-link"><span class="pre">[source]</span></span></a><a class="headerlink" href="#apache_beam.testing.test_utils.LCGenerator.next_int" title="Link to this definition"></a></dt>
<dd><p>Get the next integer value in the range of np.int32 ([0, 2^31-1]).</p>
<p>Equivalent to java.util.Random.nextInt.</p>
</dd></dl>
<dl class="py method">
<dt class="sig sig-object py" id="apache_beam.testing.test_utils.LCGenerator.next_uint">
<span class="sig-name descname"><span class="pre">next_uint</span></span><span class="sig-paren">(</span><span class="sig-paren">)</span><a class="reference internal" href="_modules/apache_beam/testing/test_utils.html#LCGenerator.next_uint"><span class="viewcode-link"><span class="pre">[source]</span></span></a><a class="headerlink" href="#apache_beam.testing.test_utils.LCGenerator.next_uint" title="Link to this definition"></a></dt>
<dd><p>Get the next unsigned integer value in the range of np.uint32.</p>
<p>Equivalent to java.util.Random.next(32).</p>
</dd></dl>
<dl class="py method">
<dt class="sig sig-object py" id="apache_beam.testing.test_utils.LCGenerator.randbytes">
<span class="sig-name descname"><span class="pre">randbytes</span></span><span class="sig-paren">(</span><em class="sig-param"><span class="n"><span class="pre">length</span></span></em><span class="sig-paren">)</span><a class="reference internal" href="_modules/apache_beam/testing/test_utils.html#LCGenerator.randbytes"><span class="viewcode-link"><span class="pre">[source]</span></span></a><a class="headerlink" href="#apache_beam.testing.test_utils.LCGenerator.randbytes" title="Link to this definition"></a></dt>
<dd><p>Get random bytes of given length.</p>
<p>Equivalent to java.util.Random.nextBytes.</p>
</dd></dl>
<dl class="py method">
<dt class="sig sig-object py" id="apache_beam.testing.test_utils.LCGenerator.random_sample">
<span class="sig-name descname"><span class="pre">random_sample</span></span><span class="sig-paren">(</span><span class="sig-paren">)</span><a class="reference internal" href="_modules/apache_beam/testing/test_utils.html#LCGenerator.random_sample"><span class="viewcode-link"><span class="pre">[source]</span></span></a><a class="headerlink" href="#apache_beam.testing.test_utils.LCGenerator.random_sample" title="Link to this definition"></a></dt>
<dd><p>Get random sample between [0.0, 1.0), single precision float value.</p>
<p>Equivalent to java.util.Random.nextFloat.</p>
</dd></dl>
</dd></dl>
</section>
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