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<title>Runtime parameters</title>
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<div class="titlepage"><div><div><h2 class="title" style="clear: both">
<a name="boost_test.runtime_config"></a><a class="link" href="runtime_config.html" title="Runtime parameters">Runtime parameters</a>
</h2></div></div></div>
<div class="toc"><dl class="toc">
<dt><span class="section"><a href="runtime_config/test_unit_filtering.html">Test unit
      filtering</a></span></dt>
<dt><span class="section"><a href="runtime_config/custom_command_line_arguments.html">Custom
      command line arguments</a></span></dt>
<dt><span class="section"><a href="runtime_config/summary.html">Summary of run-time
      parameters</a></span></dt>
</dl></div>
<h5>
<a name="boost_test.runtime_config.h0"></a>
      <span class="phrase"><a name="boost_test.runtime_config.boost_test_runtime_parameters"></a></span><a class="link" href="runtime_config.html#boost_test.runtime_config.boost_test_runtime_parameters">Boost.Test
      runtime parameters</a>
    </h5>
<p>
      The <span class="emphasis"><em>Unit Test Framework</em></span> supports multiple parameters that
      affect test module execution. To set the parameter's value you can either use
      a runtime configuration subsystem interface from within the test module initialization
      function or you can specify the value at runtime during test module invocation.
    </p>
<p>
      The <span class="emphasis"><em>Unit Test Framework</em></span> provides two ways to set a parameter
      at runtime: by specifying a command line argument and by setting an environment
      variable. The command line argument always overrides the corresponding environment
      variable.
    </p>
<p>
      During test module initialization the <span class="emphasis"><em>Unit Test Framework</em></span>
      parses the command line and excludes all parameters that belong to it and their
      values from the argument list. The rest of command line is forwarded to the
      test module initialization function supplied by you. The command line argument
      format expected by the <span class="emphasis"><em>Unit Test Framework</em></span> is:
    </p>
<pre class="programlisting">  --&lt;command_line_argument_name&gt;=&lt;argument_value&gt;
</pre>
<p>
      The command line argument name is case sensitive. It is required to match exactly
      the name in parameter specification. There should not be any spaces between
      '=' and either command line argument name or argument value.
    </p>
<p>
      The corresponding environment variable name is also case sensitive and is required
      to exactly match the name in the parameter specification.
    </p>
<p>
      All information about the currently supported parameters of the <span class="emphasis"><em>Unit
      Test Framework</em></span> is summarized in the section <a class="link" href="runtime_config/summary.html" title="Summary of run-time parameters">boost_test.runtime_config.summary</a>.
    </p>
<h5>
<a name="boost_test.runtime_config.h1"></a>
      <span class="phrase"><a name="boost_test.runtime_config.test_filtering"></a></span><a class="link" href="runtime_config.html#boost_test.runtime_config.test_filtering">Test
      filtering</a>
    </h5>
<p>
      The <span class="emphasis"><em>Unit Test Framework</em></span> provides an extensive filtering
      facility making it easy to run a specific test or a subset of tests. The <a class="link" href="runtime_config/test_unit_filtering.html" title="Test unit filtering">section on filtering</a>
      gives all the details for the command line interface.
    </p>
<p>
      Additionally, <a class="link" href="tests_organization/test_tree/test_suite.html" title="Test suite">test-suites</a>
      and <a class="link" href="tests_organization/tests_grouping.html" title="Grouping tests into logical units by labels">labels</a>
      may be used in order to construct subset of tests in an efficient and easy
      way, while decorators (eg. <a class="link" href="utf_reference/test_org_reference/decorator_enabled.html" title="enabled / disabled (decorator)"><code class="computeroutput"><span class="identifier">disabled</span></code></a>, <a class="link" href="utf_reference/test_org_reference/decorator_precondition.html" title="precondition (decorator)"><code class="computeroutput"><span class="identifier">precondition</span></code></a>) can be used to set the
      default run status of a test case.
    </p>
<h5>
<a name="boost_test.runtime_config.h2"></a>
      <span class="phrase"><a name="boost_test.runtime_config.custom_runtime_parameters"></a></span><a class="link" href="runtime_config.html#boost_test.runtime_config.custom_runtime_parameters">Custom
      runtime parameters</a>
    </h5>
<p>
      It is possible to extend further the command line interface by providing a
      custom command line interpretation logic. There are several ways on how to
      integrate this logic in the <span class="emphasis"><em>Unit Test Framework</em></span> and this
      is explained in details in the section <a class="link" href="runtime_config/custom_command_line_arguments.html" title="Custom command line arguments">Custom
      runtime parameters</a>.
    </p>
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