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<div class="titlepage"><div><div><h3 class="title">
<a name="boost_test.runtime_config.custom_command_line_arguments"></a><a class="link" href="custom_command_line_arguments.html" title="Custom command line arguments">Custom
      command line arguments</a>
</h3></div></div></div>
<p>
        It is possible to pass custom command line arguments to the test module.
        The general format for passing custom arguments is the following:
      </p>
<pre class="programlisting"><span class="special">&lt;</span><span class="identifier">boost_test_module</span><span class="special">&gt;</span> <span class="special">[&lt;</span><span class="identifier">boost_test_arg1</span><span class="special">&gt;...]</span> <span class="special">[--</span> <span class="special">[&lt;</span><span class="identifier">custom_parameter1</span><span class="special">&gt;...]</span>
</pre>
<p>
        This means that everything that is passed after "<code class="computeroutput"><span class="special">--</span></code>"
        is considered as a custom parameter and will not be intercepted nor interpreted
        by the <span class="emphasis"><em>Unit Test Framework</em></span>. This avoids any troubleshooting
        between the <span class="emphasis"><em>Unit Test Framework</em></span> parameters and the custom
        ones.
      </p>
<p>
        There are several use cases for accessing the arguments passed on the command
        line:
      </p>
<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; ">
<li class="listitem">
            instantiating an object used in test cases and which is dependant on
            parameters external to the test-module: the name of the graphic card,
            the credentials for a database connection, etc. The rest of the test
            module would check that the functions in test are not sensitive to this
            type of parametrization. One can also imagine running this same test
            module with different parameters (different graphic cards...) in a batched
            manner,
          </li>
<li class="listitem">
            modifying the test tree by adding or parametrizing test cases: the arguments
            passed on the command line may contain for instance a set of parameters
            that define test cases.
          </li>
</ul></div>
<p>
        In the first scenario, <a class="link" href="custom_command_line_arguments.html#ref_consuming_cmd_test_case">test cases</a>
        or fixtures, including <a class="link" href="custom_command_line_arguments.html#ref_consuming_cmd_global_fixture">global
        fixtures</a>, may be used. Since those are part of the test tree, they
        can benefit from the <span class="emphasis"><em>Unit Test Framework</em></span> rich set of
        assertions and controlled execution environment.
      </p>
<p>
        In the second scenario, the command line argument interact directly with
        the content of the test tree: by passing specific arguments, different set
        of tests are created. There are mainly two options for achieving this: using
        a dedicated <a class="link" href="custom_command_line_arguments.html#ref_consuming_cmd_init_function">initialization
        function</a> or using <a class="link" href="custom_command_line_arguments.html#ref_consuming_cmd_dataset">data driven</a>
        test cases. The error handling of the command line parameters needs however
        to be adapted.
      </p>
<a name="ref_consuming_cmd_test_case"></a><h5>
<a name="boost_test.runtime_config.custom_command_line_arguments.h0"></a>
        <span class="phrase"><a name="boost_test.runtime_config.custom_command_line_arguments.consuming_custom_arguments_from_"></a></span><a class="link" href="custom_command_line_arguments.html#boost_test.runtime_config.custom_command_line_arguments.consuming_custom_arguments_from_">Consuming
        custom arguments from a test case</a>
      </h5>
<p>
        The <a class="link" href="../tests_organization/test_tree/master_test_suite.html" title="Master test suite">master
        test suite</a> collects the custom arguments passed to the test module
        in the following way:
      </p>
<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; ">
<li class="listitem">
            <code class="computeroutput"><span class="identifier">argv</span><span class="special">[</span><span class="number">0</span><span class="special">]</span></code>, usually
            set by the operating system as the executable name, remains unchanged
          </li>
<li class="listitem">
            any argument interpreted by the test module is removed from <code class="computeroutput"><span class="identifier">argv</span></code>
          </li>
<li class="listitem">
            the empty token <code class="computeroutput"><span class="special">--</span></code> is removed
            as well
          </li>
<li class="listitem">
            any additional argument passed after the empty token is reported in
            <code class="computeroutput"><span class="identifier">argv</span></code> starting at index
            <code class="computeroutput"><span class="number">1</span></code>
          </li>
</ul></div>
<h6>
<a name="boost_test.runtime_config.custom_command_line_arguments.h1"></a>
        <span class="phrase"><a name="boost_test.runtime_config.custom_command_line_arguments.example_descr"></a></span><a class="link" href="custom_command_line_arguments.html#boost_test.runtime_config.custom_command_line_arguments.example_descr">Example:
        Basic custom command line</a>
      </h6>
<div class="informaltable"><table class="table">
<colgroup><col></colgroup>
<thead><tr><th>
                <p>
                  Code
                </p>
              </th></tr></thead>
<tbody><tr><td>
<pre xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" class="table-programlisting"><span class="preprocessor">#define</span> <span class="identifier">BOOST_TEST_MODULE</span> <span class="identifier">runtime_configuration1</span>
<span class="preprocessor">#include</span> <span class="special">&lt;</span><span class="identifier">boost</span><span class="special">/</span><span class="identifier">test</span><span class="special">/</span><span class="identifier">included</span><span class="special">/</span><span class="identifier">unit_test</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">&gt;</span>
<span class="keyword">using</span> <span class="keyword">namespace</span> <span class="identifier">boost</span><span class="special">::</span><span class="identifier">unit_test</span><span class="special">;</span>

<span class="identifier">BOOST_AUTO_TEST_CASE</span><span class="special">(</span><span class="identifier">test_accessing_command_line</span><span class="special">)</span>
<span class="special">{</span>
    <span class="identifier">BOOST_TEST_REQUIRE</span><span class="special">(</span> <span class="identifier">framework</span><span class="special">::</span><span class="identifier">master_test_suite</span><span class="special">().</span><span class="identifier">argc</span> <span class="special">==</span> <span class="number">3</span> <span class="special">);</span>
    <span class="identifier">BOOST_TEST</span><span class="special">(</span> <span class="identifier">framework</span><span class="special">::</span><span class="identifier">master_test_suite</span><span class="special">().</span><span class="identifier">argv</span><span class="special">[</span><span class="number">1</span><span class="special">]</span> <span class="special">==</span> <span class="string">"--specific-param"</span> <span class="special">);</span>
    <span class="identifier">BOOST_TEST</span><span class="special">(</span> <span class="identifier">framework</span><span class="special">::</span><span class="identifier">master_test_suite</span><span class="special">().</span><span class="identifier">argv</span><span class="special">[</span><span class="number">2</span><span class="special">]</span> <span class="special">==</span> <span class="string">"'additional value with quotes'"</span> <span class="special">);</span>
    <span class="identifier">BOOST_TEST_MESSAGE</span><span class="special">(</span> <span class="string">"'argv[0]' contains "</span> <span class="special">&lt;&lt;</span> <span class="identifier">framework</span><span class="special">::</span><span class="identifier">master_test_suite</span><span class="special">().</span><span class="identifier">argv</span><span class="special">[</span><span class="number">0</span><span class="special">]</span> <span class="special">);</span>
<span class="special">}</span>
</pre>
              </td></tr></tbody>
</table></div>
<div class="informaltable"><table class="table">
<colgroup><col></colgroup>
<thead><tr><th>
                <p>
                  Output
                </p>
              </th></tr></thead>
<tbody><tr><td>
<pre xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" class="table-programlisting"><span class="special">&gt;</span> <span class="identifier">runtime_configuration1</span> <span class="special">--</span><span class="identifier">log_level</span><span class="special">=</span><span class="identifier">all</span> <span class="special">--</span><span class="identifier">no_color</span> <span class="special">--</span> <span class="special">--</span><span class="identifier">specific</span><span class="special">-</span><span class="identifier">param</span> <span class="string">"'additional value with quotes'"</span>
<span class="identifier">Running</span> <span class="number">1</span> <span class="identifier">test</span> <span class="keyword">case</span><span class="special">...</span>
<span class="identifier">Entering</span> <span class="identifier">test</span> <span class="identifier">module</span> <span class="string">"runtime_configuration"</span>
<span class="identifier">test</span><span class="special">.</span><span class="identifier">cpp</span><span class="special">:</span><span class="number">14</span><span class="special">:</span> <span class="identifier">Entering</span> <span class="identifier">test</span> <span class="keyword">case</span> <span class="string">"test_accessing_command_line"</span>
<span class="identifier">test</span><span class="special">.</span><span class="identifier">cpp</span><span class="special">:</span><span class="number">16</span><span class="special">:</span> <span class="identifier">info</span><span class="special">:</span> <span class="identifier">check</span> <span class="identifier">framework</span><span class="special">::</span><span class="identifier">master_test_suite</span><span class="special">().</span><span class="identifier">argc</span> <span class="special">==</span> <span class="number">3</span> <span class="identifier">has</span> <span class="identifier">passed</span>
<span class="identifier">test</span><span class="special">.</span><span class="identifier">cpp</span><span class="special">:</span><span class="number">17</span><span class="special">:</span> <span class="identifier">info</span><span class="special">:</span> <span class="identifier">check</span> <span class="identifier">framework</span><span class="special">::</span><span class="identifier">master_test_suite</span><span class="special">().</span><span class="identifier">argv</span><span class="special">[</span><span class="number">1</span><span class="special">]</span> <span class="special">==</span> <span class="string">"--specific-param"</span> <span class="identifier">has</span> <span class="identifier">passed</span>
<span class="identifier">test</span><span class="special">.</span><span class="identifier">cpp</span><span class="special">:</span><span class="number">18</span><span class="special">:</span> <span class="identifier">info</span><span class="special">:</span> <span class="identifier">check</span> <span class="identifier">framework</span><span class="special">::</span><span class="identifier">master_test_suite</span><span class="special">().</span><span class="identifier">argv</span><span class="special">[</span><span class="number">2</span><span class="special">]</span> <span class="special">==</span> <span class="string">"'additional value with quotes'"</span> <span class="identifier">has</span> <span class="identifier">passed</span>
<span class="char">'argv[0]'</span> <span class="identifier">contains</span> <span class="identifier">runtime_configuration1</span>
<span class="identifier">test</span><span class="special">.</span><span class="identifier">cpp</span><span class="special">:</span><span class="number">14</span><span class="special">:</span> <span class="identifier">Leaving</span> <span class="identifier">test</span> <span class="keyword">case</span> <span class="string">"test_accessing_command_line"</span><span class="special">;</span> <span class="identifier">testing</span> <span class="identifier">time</span><span class="special">:</span> <span class="number">178u</span><span class="identifier">s</span>
<span class="identifier">Leaving</span> <span class="identifier">test</span> <span class="identifier">module</span> <span class="string">"runtime_configuration"</span><span class="special">;</span> <span class="identifier">testing</span> <span class="identifier">time</span><span class="special">:</span> <span class="number">220u</span><span class="identifier">s</span>

<span class="special">***</span> <span class="identifier">No</span> <span class="identifier">errors</span> <span class="identifier">detected</span>
</pre>
              </td></tr></tbody>
</table></div>
<a name="ref_consuming_cmd_global_fixture"></a><h5>
<a name="boost_test.runtime_config.custom_command_line_arguments.h2"></a>
        <span class="phrase"><a name="boost_test.runtime_config.custom_command_line_arguments.consuming_custom_arguments_from0"></a></span><a class="link" href="custom_command_line_arguments.html#boost_test.runtime_config.custom_command_line_arguments.consuming_custom_arguments_from0">Consuming
        custom arguments from a global fixture</a>
      </h5>
<p>
        Another possibility for consuming the custom command line arguments would
        be from within a <a class="link" href="../tests_organization/fixtures/global.html" title="Global fixture">global
        fixture</a>. This is especially useful when external parameters are needed
        for instantiating global objects used in the test module.
      </p>
<p>
        The usage is the same as for test cases. The following example runs the test
        module twice with different arguments, and illustrate the feature.
      </p>
<div class="tip"><table border="0" summary="Tip">
<tr>
<td rowspan="2" align="center" valign="top" width="25"><img alt="[Tip]" src="../../../../../../doc/src/images/tip.png"></td>
<th align="left">Tip</th>
</tr>
<tr><td align="left" valign="top"><p>
          The global fixture can check for the correctness of the custom arguments
          and may abort the full run of the test module.
        </p></td></tr>
</table></div>
<h6>
<a name="boost_test.runtime_config.custom_command_line_arguments.h3"></a>
        <span class="phrase"><a name="boost_test.runtime_config.custom_command_line_arguments.example_descr0"></a></span><a class="link" href="custom_command_line_arguments.html#boost_test.runtime_config.custom_command_line_arguments.example_descr0">Example:
        Command line arguments interpreted in a global fixtures</a>
      </h6>
<div class="informaltable"><table class="table">
<colgroup><col></colgroup>
<thead><tr><th>
                <p>
                  Code
                </p>
              </th></tr></thead>
<tbody><tr><td>
<pre xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" class="table-programlisting"><span class="preprocessor">#define</span> <span class="identifier">BOOST_TEST_MODULE</span> <span class="identifier">runtime_configuration2</span>
<span class="preprocessor">#include</span> <span class="special">&lt;</span><span class="identifier">boost</span><span class="special">/</span><span class="identifier">test</span><span class="special">/</span><span class="identifier">included</span><span class="special">/</span><span class="identifier">unit_test</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">&gt;</span>
<span class="keyword">using</span> <span class="keyword">namespace</span> <span class="identifier">boost</span><span class="special">::</span><span class="identifier">unit_test</span><span class="special">;</span>

<span class="comment">/// The interface with the device driver.</span>
<span class="keyword">class</span> <span class="identifier">DeviceInterface</span> <span class="special">{</span>
<span class="keyword">public</span><span class="special">:</span>
    <span class="comment">// acquires a specific device based on its name</span>
    <span class="keyword">static</span> <span class="identifier">DeviceInterface</span><span class="special">*</span> <span class="identifier">factory</span><span class="special">(</span><span class="identifier">std</span><span class="special">::</span><span class="identifier">string</span> <span class="keyword">const</span><span class="special">&amp;</span> <span class="identifier">device_name</span><span class="special">);</span>
    <span class="keyword">virtual</span> <span class="special">~</span><span class="identifier">DeviceInterface</span><span class="special">(){}</span>

    <span class="keyword">virtual</span> <span class="keyword">bool</span> <span class="identifier">setup</span><span class="special">()</span> <span class="special">=</span> <span class="number">0</span><span class="special">;</span>
    <span class="keyword">virtual</span> <span class="keyword">bool</span> <span class="identifier">teardown</span><span class="special">()</span> <span class="special">=</span> <span class="number">0</span><span class="special">;</span>
    <span class="keyword">virtual</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">string</span> <span class="identifier">get_device_name</span><span class="special">()</span> <span class="keyword">const</span> <span class="special">=</span> <span class="number">0</span><span class="special">;</span>
<span class="special">};</span>

<span class="keyword">class</span> <span class="identifier">MockDevice</span><span class="special">:</span> <span class="keyword">public</span> <span class="identifier">DeviceInterface</span> <span class="special">{</span>
    <span class="keyword">bool</span> <span class="identifier">setup</span><span class="special">()</span> <span class="identifier">final</span> <span class="special">{</span>
        <span class="keyword">return</span> <span class="keyword">true</span><span class="special">;</span>
    <span class="special">}</span>
    <span class="keyword">bool</span> <span class="identifier">teardown</span><span class="special">()</span> <span class="identifier">final</span> <span class="special">{</span>
        <span class="keyword">return</span> <span class="keyword">true</span><span class="special">;</span>
    <span class="special">}</span>
    <span class="identifier">std</span><span class="special">::</span><span class="identifier">string</span> <span class="identifier">get_device_name</span><span class="special">()</span> <span class="keyword">const</span> <span class="special">{</span>
        <span class="keyword">return</span> <span class="string">"mock_device"</span><span class="special">;</span>
    <span class="special">}</span>
<span class="special">};</span>

<span class="identifier">DeviceInterface</span><span class="special">*</span> <span class="identifier">DeviceInterface</span><span class="special">::</span><span class="identifier">factory</span><span class="special">(</span><span class="identifier">std</span><span class="special">::</span><span class="identifier">string</span> <span class="keyword">const</span><span class="special">&amp;</span> <span class="identifier">device_name</span><span class="special">)</span> <span class="special">{</span>
    <span class="keyword">if</span><span class="special">(</span><span class="identifier">device_name</span> <span class="special">==</span> <span class="string">"mock_device"</span><span class="special">)</span> <span class="special">{</span>
        <span class="keyword">return</span> <span class="keyword">new</span> <span class="identifier">MockDevice</span><span class="special">();</span>
    <span class="special">}</span>
    <span class="keyword">return</span> <span class="keyword">nullptr</span><span class="special">;</span>
<span class="special">}</span>

<span class="keyword">struct</span> <span class="identifier">CommandLineDeviceInit</span> <span class="special">{</span>
  <span class="identifier">CommandLineDeviceInit</span><span class="special">()</span> <span class="special">{</span>
      <span class="identifier">BOOST_TEST_REQUIRE</span><span class="special">(</span> <span class="identifier">framework</span><span class="special">::</span><span class="identifier">master_test_suite</span><span class="special">().</span><span class="identifier">argc</span> <span class="special">==</span> <span class="number">3</span> <span class="special">);</span>
      <span class="identifier">BOOST_TEST_REQUIRE</span><span class="special">(</span> <span class="identifier">framework</span><span class="special">::</span><span class="identifier">master_test_suite</span><span class="special">().</span><span class="identifier">argv</span><span class="special">[</span><span class="number">1</span><span class="special">]</span> <span class="special">==</span> <span class="string">"--device-name"</span> <span class="special">);</span>
  <span class="special">}</span>
  <span class="keyword">void</span> <span class="identifier">setup</span><span class="special">()</span> <span class="special">{</span>
      <span class="identifier">device</span> <span class="special">=</span> <span class="identifier">DeviceInterface</span><span class="special">::</span><span class="identifier">factory</span><span class="special">(</span><span class="identifier">framework</span><span class="special">::</span><span class="identifier">master_test_suite</span><span class="special">().</span><span class="identifier">argv</span><span class="special">[</span><span class="number">2</span><span class="special">]);</span>
      <span class="identifier">BOOST_TEST_REQUIRE</span><span class="special">(</span>
        <span class="identifier">device</span> <span class="special">!=</span> <span class="keyword">nullptr</span><span class="special">,</span>
        <span class="string">"Cannot create the device "</span> <span class="special">&lt;&lt;</span> <span class="identifier">framework</span><span class="special">::</span><span class="identifier">master_test_suite</span><span class="special">().</span><span class="identifier">argv</span><span class="special">[</span><span class="number">2</span><span class="special">]</span> <span class="special">);</span>
      <span class="identifier">BOOST_TEST_REQUIRE</span><span class="special">(</span>
        <span class="identifier">device</span><span class="special">-&gt;</span><span class="identifier">setup</span><span class="special">(),</span>
        <span class="string">"Cannot initialize the device "</span> <span class="special">&lt;&lt;</span> <span class="identifier">framework</span><span class="special">::</span><span class="identifier">master_test_suite</span><span class="special">().</span><span class="identifier">argv</span><span class="special">[</span><span class="number">2</span><span class="special">]</span> <span class="special">);</span>
  <span class="special">}</span>
  <span class="keyword">void</span> <span class="identifier">teardown</span><span class="special">()</span> <span class="special">{</span>
      <span class="keyword">if</span><span class="special">(</span><span class="identifier">device</span><span class="special">)</span> <span class="special">{</span>
        <span class="identifier">BOOST_TEST</span><span class="special">(</span>
          <span class="identifier">device</span><span class="special">-&gt;</span><span class="identifier">teardown</span><span class="special">(),</span>
          <span class="string">"Cannot tear-down the device "</span> <span class="special">&lt;&lt;</span> <span class="identifier">framework</span><span class="special">::</span><span class="identifier">master_test_suite</span><span class="special">().</span><span class="identifier">argv</span><span class="special">[</span><span class="number">2</span><span class="special">]);</span>
      <span class="special">}</span>
      <span class="keyword">delete</span> <span class="identifier">device</span><span class="special">;</span>
  <span class="special">}</span>
  <span class="keyword">static</span> <span class="identifier">DeviceInterface</span> <span class="special">*</span><span class="identifier">device</span><span class="special">;</span>
<span class="special">};</span>
<span class="identifier">DeviceInterface</span><span class="special">*</span> <span class="identifier">CommandLineDeviceInit</span><span class="special">::</span><span class="identifier">device</span> <span class="special">=</span> <span class="keyword">nullptr</span><span class="special">;</span>

<span class="identifier">BOOST_TEST_GLOBAL_FIXTURE</span><span class="special">(</span> <span class="identifier">CommandLineDeviceInit</span> <span class="special">);</span>

<span class="identifier">BOOST_AUTO_TEST_CASE</span><span class="special">(</span><span class="identifier">check_device_has_meaningful_name</span><span class="special">)</span>
<span class="special">{</span>
    <span class="identifier">BOOST_TEST</span><span class="special">(</span><span class="identifier">CommandLineDeviceInit</span><span class="special">::</span><span class="identifier">device</span><span class="special">-&gt;</span><span class="identifier">get_device_name</span><span class="special">()</span> <span class="special">!=</span> <span class="string">""</span><span class="special">);</span>
<span class="special">}</span>
</pre>
              </td></tr></tbody>
</table></div>
<div class="informaltable"><table class="table">
<colgroup><col></colgroup>
<thead><tr><th>
                <p>
                  Output
                </p>
              </th></tr></thead>
<tbody><tr><td>
<pre xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" class="table-programlisting"><span class="preprocessor"># Example</span> <span class="identifier">run</span> <span class="number">1</span>
<span class="special">&gt;</span> <span class="identifier">runtime_configuration2</span> <span class="special">--</span><span class="identifier">log_level</span><span class="special">=</span><span class="identifier">all</span>  <span class="special">--</span> <span class="special">--</span><span class="identifier">some</span><span class="special">-</span><span class="identifier">wrong</span><span class="special">-</span><span class="identifier">random</span><span class="special">-</span><span class="identifier">string</span> <span class="identifier">mock_device</span>
<span class="identifier">Running</span> <span class="number">1</span> <span class="identifier">test</span> <span class="keyword">case</span><span class="special">...</span>
<span class="identifier">Entering</span> <span class="identifier">test</span> <span class="identifier">module</span> <span class="string">"runtime_configuration2"</span>
<span class="identifier">test</span><span class="special">.</span><span class="identifier">cpp</span><span class="special">:</span><span class="number">46</span><span class="special">:</span> <span class="identifier">info</span><span class="special">:</span> <span class="identifier">check</span> <span class="identifier">framework</span><span class="special">::</span><span class="identifier">master_test_suite</span><span class="special">().</span><span class="identifier">argc</span> <span class="special">==</span> <span class="number">3</span> <span class="identifier">has</span> <span class="identifier">passed</span>
<span class="identifier">test</span><span class="special">.</span><span class="identifier">cpp</span><span class="special">:</span><span class="number">47</span><span class="special">:</span> <span class="identifier">fatal</span> <span class="identifier">error</span><span class="special">:</span> <span class="identifier">in</span> <span class="string">"runtime_configuration2"</span><span class="special">:</span> <span class="identifier">critical</span> <span class="identifier">check</span> <span class="identifier">framework</span><span class="special">::</span><span class="identifier">master_test_suite</span><span class="special">().</span><span class="identifier">argv</span><span class="special">[</span><span class="number">1</span><span class="special">]</span> <span class="special">==</span> <span class="string">"--device-name"</span> <span class="identifier">has</span> <span class="identifier">failed</span> <span class="special">[--</span><span class="identifier">some</span><span class="special">-</span><span class="identifier">wrong</span><span class="special">-</span><span class="identifier">random</span><span class="special">-</span><span class="identifier">string</span> <span class="special">!=</span> <span class="special">--</span><span class="identifier">device</span><span class="special">-</span><span class="identifier">name</span><span class="special">]</span>
<span class="identifier">Leaving</span> <span class="identifier">test</span> <span class="identifier">module</span> <span class="string">"runtime_configuration2"</span>

<span class="special">***</span> <span class="identifier">The</span> <span class="identifier">test</span> <span class="identifier">module</span> <span class="string">"runtime_configuration2"</span> <span class="identifier">was</span> <span class="identifier">aborted</span><span class="special">;</span> <span class="identifier">see</span> <span class="identifier">standard</span> <span class="identifier">output</span> <span class="keyword">for</span> <span class="identifier">details</span>
<span class="special">***</span> <span class="number">1</span> <span class="identifier">failure</span> <span class="identifier">is</span> <span class="identifier">detected</span> <span class="identifier">in</span> <span class="identifier">the</span> <span class="identifier">test</span> <span class="identifier">module</span> <span class="string">"runtime_configuration2"</span>

<span class="preprocessor"># Example</span> <span class="identifier">run</span> <span class="number">2</span>
<span class="special">&gt;</span> <span class="identifier">runtime_configuration2</span> <span class="special">--</span><span class="identifier">log_level</span><span class="special">=</span><span class="identifier">all</span> <span class="special">--</span> <span class="special">--</span><span class="identifier">device</span><span class="special">-</span><span class="identifier">name</span> <span class="identifier">mock_device</span>
<span class="identifier">Running</span> <span class="number">1</span> <span class="identifier">test</span> <span class="keyword">case</span><span class="special">...</span>
<span class="identifier">Entering</span> <span class="identifier">test</span> <span class="identifier">module</span> <span class="string">"runtime_configuration2"</span>
<span class="identifier">test</span><span class="special">.</span><span class="identifier">cpp</span><span class="special">:</span><span class="number">46</span><span class="special">:</span> <span class="identifier">info</span><span class="special">:</span> <span class="identifier">check</span> <span class="identifier">framework</span><span class="special">::</span><span class="identifier">master_test_suite</span><span class="special">().</span><span class="identifier">argc</span> <span class="special">==</span> <span class="number">3</span> <span class="identifier">has</span> <span class="identifier">passed</span>
<span class="identifier">test</span><span class="special">.</span><span class="identifier">cpp</span><span class="special">:</span><span class="number">47</span><span class="special">:</span> <span class="identifier">info</span><span class="special">:</span> <span class="identifier">check</span> <span class="identifier">framework</span><span class="special">::</span><span class="identifier">master_test_suite</span><span class="special">().</span><span class="identifier">argv</span><span class="special">[</span><span class="number">1</span><span class="special">]</span> <span class="special">==</span> <span class="string">"--device-name"</span> <span class="identifier">has</span> <span class="identifier">passed</span>
<span class="identifier">test</span><span class="special">.</span><span class="identifier">cpp</span><span class="special">:</span><span class="number">53</span><span class="special">:</span> <span class="identifier">info</span><span class="special">:</span> <span class="identifier">check</span> <span class="char">'Cannot create the device mock_device'</span> <span class="identifier">has</span> <span class="identifier">passed</span>
<span class="identifier">test</span><span class="special">.</span><span class="identifier">cpp</span><span class="special">:</span><span class="number">56</span><span class="special">:</span> <span class="identifier">info</span><span class="special">:</span> <span class="identifier">check</span> <span class="char">'Cannot initialize the device mock_device'</span> <span class="identifier">has</span> <span class="identifier">passed</span>
<span class="identifier">test</span><span class="special">.</span><span class="identifier">cpp</span><span class="special">:</span><span class="number">72</span><span class="special">:</span> <span class="identifier">Entering</span> <span class="identifier">test</span> <span class="keyword">case</span> <span class="string">"check_device_has_meaningful_name"</span>
<span class="identifier">test</span><span class="special">.</span><span class="identifier">cpp</span><span class="special">:</span><span class="number">74</span><span class="special">:</span> <span class="identifier">info</span><span class="special">:</span> <span class="identifier">check</span> <span class="identifier">CommandLineDeviceInit</span><span class="special">::</span><span class="identifier">device</span><span class="special">-&gt;</span><span class="identifier">get_device_name</span><span class="special">()</span> <span class="special">!=</span> <span class="string">""</span> <span class="identifier">has</span> <span class="identifier">passed</span>
<span class="identifier">test</span><span class="special">.</span><span class="identifier">cpp</span><span class="special">:</span><span class="number">72</span><span class="special">:</span> <span class="identifier">Leaving</span> <span class="identifier">test</span> <span class="keyword">case</span> <span class="string">"check_device_has_meaningful_name"</span><span class="special">;</span> <span class="identifier">testing</span> <span class="identifier">time</span><span class="special">:</span> <span class="number">127u</span><span class="identifier">s</span>
<span class="identifier">test</span><span class="special">.</span><span class="identifier">cpp</span><span class="special">:</span><span class="number">62</span><span class="special">:</span> <span class="identifier">info</span><span class="special">:</span> <span class="identifier">check</span> <span class="char">'Cannot tear-down the device mock_device'</span> <span class="identifier">has</span> <span class="identifier">passed</span>
<span class="identifier">Leaving</span> <span class="identifier">test</span> <span class="identifier">module</span> <span class="string">"runtime_configuration2"</span><span class="special">;</span> <span class="identifier">testing</span> <span class="identifier">time</span><span class="special">:</span> <span class="number">177u</span><span class="identifier">s</span>

<span class="special">***</span> <span class="identifier">No</span> <span class="identifier">errors</span> <span class="identifier">detected</span>
</pre>
              </td></tr></tbody>
</table></div>
<p>
        The above example instantiates a specific device through the <code class="computeroutput"><span class="identifier">DeviceInterface</span><span class="special">::</span><span class="identifier">factory</span></code> member function. The name of the
        device to instantiate is passed via the command line argument <code class="computeroutput"><span class="special">--</span><span class="identifier">device</span><span class="special">-</span><span class="identifier">name</span></code>,
        and the instantiated device is available through the global object <code class="computeroutput"><span class="identifier">CommandLineDeviceInit</span><span class="special">::</span><span class="identifier">device</span></code>. The module requires <code class="computeroutput"><span class="number">3</span></code> arguments on the command line:
      </p>
<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; ">
<li class="listitem">
            <code class="computeroutput"><span class="identifier">framework</span><span class="special">::</span><span class="identifier">master_test_suite</span><span class="special">().</span><span class="identifier">argv</span><span class="special">[</span><span class="number">0</span><span class="special">]</span></code> is the
            test module name as explained in the previous paragraph
          </li>
<li class="listitem">
            <code class="computeroutput"><span class="identifier">framework</span><span class="special">::</span><span class="identifier">master_test_suite</span><span class="special">().</span><span class="identifier">argv</span><span class="special">[</span><span class="number">1</span><span class="special">]</span></code> should
            be equal to <code class="computeroutput"><span class="special">--</span><span class="identifier">device</span><span class="special">-</span><span class="identifier">name</span></code>
          </li>
<li class="listitem">
            <code class="computeroutput"><span class="identifier">framework</span><span class="special">::</span><span class="identifier">master_test_suite</span><span class="special">().</span><span class="identifier">argv</span><span class="special">[</span><span class="number">2</span><span class="special">]</span></code> should
            be the name of the device to instantiate
          </li>
</ul></div>
<p>
        As it can be seen in the shell outputs, any command line argument consumed
        by the <span class="emphasis"><em>Unit Test Framework</em></span> is removed from <code class="computeroutput"><span class="identifier">argc</span></code> / <code class="computeroutput"><span class="identifier">argv</span></code>.
        Since global fixtures are running in the <span class="emphasis"><em>Unit Test Framework</em></span>
        controlled environment, any fatal error reported by the fixture (through
        the <a class="link" href="../utf_reference/testing_tool_ref/assertion_boost_test_universal_macro.html" title="BOOST_TEST"><code class="computeroutput"><span class="identifier">BOOST_TEST_REQUIRE</span></code></a> assertion) aborts
        the test execution. Non fatal errors on the other hand do not abort the test-module
        and are reported as assertion failure, and would not prevent the execution
        of the test case <code class="computeroutput"><span class="identifier">check_device_has_meaningful_name</span></code>.
      </p>
<div class="note"><table border="0" summary="Note">
<tr>
<td rowspan="2" align="center" valign="top" width="25"><img alt="[Note]" src="../../../../../../doc/src/images/note.png"></td>
<th align="left">Note</th>
</tr>
<tr><td align="left" valign="top"><p>
          It is possible to have several global fixtures in a test module, spread
          over several compilation units. Each of those fixture may in turn be accessing
          a specific part of the command line.
        </p></td></tr>
</table></div>
<a name="ref_consuming_cmd_init_function"></a><h5>
<a name="boost_test.runtime_config.custom_command_line_arguments.h4"></a>
        <span class="phrase"><a name="boost_test.runtime_config.custom_command_line_arguments.parametrizing_the_test_tree_from"></a></span><a class="link" href="custom_command_line_arguments.html#boost_test.runtime_config.custom_command_line_arguments.parametrizing_the_test_tree_from">Parametrizing
        the test tree from command line in the initialization function</a>
      </h5>
<p>
        The initialization function are described in details in this <a class="link" href="../adv_scenarios/test_module_init_overview.html" title="Test module's initialization">section</a>.
        The initialization function is called before any other test or fixture, and
        before entering the master test suite. The initialization function is not
        considered as a test-case, although it is called under the controlled execution
        environment of the <span class="emphasis"><em>Unit Test Framework</em></span>. This means that:
      </p>
<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; ">
<li class="listitem">
            the errors will be properly handled,
          </li>
<li class="listitem">
            loggers are not fully operational,
          </li>
<li class="listitem">
            it is not possible to use the <span class="emphasis"><em>Unit Test Framework</em></span>
            assertion macros like <a class="link" href="../utf_reference/testing_tool_ref/assertion_boost_test_universal_macro.html" title="BOOST_TEST"><code class="computeroutput"><span class="identifier">BOOST_TEST</span></code></a> as it is not a test-case.
          </li>
</ul></div>
<p>
        The following example shows how to use the command line arguments parsing
        described above to create/add new test cases to the test tree. It also shows
        very limited support to messages (does not work for all loggers), and error
        handling.
      </p>
<h6>
<a name="boost_test.runtime_config.custom_command_line_arguments.h5"></a>
        <span class="phrase"><a name="boost_test.runtime_config.custom_command_line_arguments.example_descr1"></a></span><a class="link" href="custom_command_line_arguments.html#boost_test.runtime_config.custom_command_line_arguments.example_descr1">Example:
        Init function parametrized from the command line</a>
      </h6>
<div class="informaltable"><table class="table">
<colgroup><col></colgroup>
<thead><tr><th>
                <p>
                  Code
                </p>
              </th></tr></thead>
<tbody><tr><td>
<pre xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" class="table-programlisting"><span class="preprocessor">#define</span> <span class="identifier">BOOST_TEST_ALTERNATIVE_INIT_API</span>
<span class="preprocessor">#include</span> <span class="special">&lt;</span><span class="identifier">boost</span><span class="special">/</span><span class="identifier">test</span><span class="special">/</span><span class="identifier">included</span><span class="special">/</span><span class="identifier">unit_test</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">&gt;</span>
<span class="preprocessor">#include</span> <span class="special">&lt;</span><span class="identifier">functional</span><span class="special">&gt;</span>
<span class="preprocessor">#include</span> <span class="special">&lt;</span><span class="identifier">sstream</span><span class="special">&gt;</span>

<span class="keyword">using</span> <span class="keyword">namespace</span> <span class="identifier">boost</span><span class="special">::</span><span class="identifier">unit_test</span><span class="special">;</span>

<span class="keyword">void</span> <span class="identifier">test_function</span><span class="special">(</span><span class="keyword">int</span> <span class="identifier">i</span><span class="special">)</span> <span class="special">{</span>
  <span class="identifier">BOOST_TEST</span><span class="special">(</span><span class="identifier">i</span> <span class="special">&gt;=</span> <span class="number">1</span><span class="special">);</span>
<span class="special">}</span>

<span class="comment">// helper</span>
<span class="keyword">int</span> <span class="identifier">read_integer</span><span class="special">(</span><span class="keyword">const</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">string</span> <span class="special">&amp;</span><span class="identifier">str</span><span class="special">)</span> <span class="special">{</span>
  <span class="identifier">std</span><span class="special">::</span><span class="identifier">istringstream</span> <span class="identifier">buff</span><span class="special">(</span> <span class="identifier">str</span> <span class="special">);</span>
  <span class="keyword">int</span> <span class="identifier">number</span> <span class="special">=</span> <span class="number">0</span><span class="special">;</span>
  <span class="identifier">buff</span> <span class="special">&gt;&gt;</span> <span class="identifier">number</span><span class="special">;</span>
  <span class="keyword">if</span><span class="special">(</span><span class="identifier">buff</span><span class="special">.</span><span class="identifier">fail</span><span class="special">())</span> <span class="special">{</span>
    <span class="comment">// it is also possible to raise a boost.test specific exception.</span>
    <span class="keyword">throw</span> <span class="identifier">framework</span><span class="special">::</span><span class="identifier">setup_error</span><span class="special">(</span><span class="string">"Argument '"</span> <span class="special">+</span> <span class="identifier">str</span> <span class="special">+</span> <span class="string">"' not integer"</span><span class="special">);</span>
  <span class="special">}</span>
  <span class="keyword">return</span> <span class="identifier">number</span><span class="special">;</span>
<span class="special">}</span>

<span class="keyword">bool</span> <span class="identifier">init_unit_test</span><span class="special">()</span>
<span class="special">{</span>
  <span class="keyword">int</span> <span class="identifier">argc</span> <span class="special">=</span> <span class="identifier">boost</span><span class="special">::</span><span class="identifier">unit_test</span><span class="special">::</span><span class="identifier">framework</span><span class="special">::</span><span class="identifier">master_test_suite</span><span class="special">().</span><span class="identifier">argc</span><span class="special">;</span>
  <span class="keyword">char</span><span class="special">**</span> <span class="identifier">argv</span> <span class="special">=</span> <span class="identifier">boost</span><span class="special">::</span><span class="identifier">unit_test</span><span class="special">::</span><span class="identifier">framework</span><span class="special">::</span><span class="identifier">master_test_suite</span><span class="special">().</span><span class="identifier">argv</span><span class="special">;</span>

  <span class="keyword">if</span><span class="special">(</span> <span class="identifier">argc</span> <span class="special">&lt;=</span> <span class="number">1</span><span class="special">)</span> <span class="special">{</span>
      <span class="keyword">return</span> <span class="keyword">false</span><span class="special">;</span> <span class="comment">// returning false to indicate an error</span>
  <span class="special">}</span>

  <span class="keyword">if</span><span class="special">(</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">string</span><span class="special">(</span><span class="identifier">argv</span><span class="special">[</span><span class="number">1</span><span class="special">])</span> <span class="special">==</span> <span class="string">"--create-parametrized"</span> <span class="special">)</span> <span class="special">{</span>
    <span class="keyword">if</span><span class="special">(</span><span class="identifier">argc</span> <span class="special">&lt;</span> <span class="number">3</span><span class="special">)</span> <span class="special">{</span>
      <span class="comment">// the logging availability depends on the logger type</span>
      <span class="identifier">BOOST_TEST_MESSAGE</span><span class="special">(</span><span class="string">"Not enough parameters"</span><span class="special">);</span>
      <span class="keyword">return</span> <span class="keyword">false</span><span class="special">;</span>
    <span class="special">}</span>

    <span class="keyword">int</span> <span class="identifier">number_tests</span> <span class="special">=</span> <span class="identifier">read_integer</span><span class="special">(</span><span class="identifier">argv</span><span class="special">[</span><span class="number">2</span><span class="special">]);</span>
    <span class="keyword">int</span> <span class="identifier">test_start</span> <span class="special">=</span> <span class="number">0</span><span class="special">;</span>
    <span class="keyword">if</span><span class="special">(</span><span class="identifier">argc</span> <span class="special">&gt;</span> <span class="number">3</span><span class="special">)</span> <span class="special">{</span>
        <span class="identifier">test_start</span> <span class="special">=</span> <span class="identifier">read_integer</span><span class="special">(</span><span class="identifier">argv</span><span class="special">[</span><span class="number">3</span><span class="special">]);</span>
    <span class="special">}</span>

    <span class="keyword">for</span><span class="special">(</span><span class="keyword">int</span> <span class="identifier">i</span> <span class="special">=</span> <span class="identifier">test_start</span><span class="special">;</span> <span class="identifier">i</span> <span class="special">&lt;</span> <span class="identifier">number_tests</span><span class="special">;</span> <span class="identifier">i</span><span class="special">++)</span> <span class="special">{</span>
        <span class="identifier">std</span><span class="special">::</span><span class="identifier">ostringstream</span> <span class="identifier">ostr</span><span class="special">;</span>
        <span class="identifier">ostr</span> <span class="special">&lt;&lt;</span> <span class="string">"name "</span> <span class="special">&lt;&lt;</span> <span class="identifier">i</span><span class="special">;</span>
        <span class="comment">// create test-cases, avoiding duplicate names</span>
        <span class="identifier">framework</span><span class="special">::</span><span class="identifier">master_test_suite</span><span class="special">().</span>
            <span class="identifier">add</span><span class="special">(</span> <span class="identifier">BOOST_TEST_CASE_NAME</span><span class="special">(</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">bind</span><span class="special">(&amp;</span><span class="identifier">test_function</span><span class="special">,</span> <span class="identifier">i</span><span class="special">),</span> <span class="identifier">ostr</span><span class="special">.</span><span class="identifier">str</span><span class="special">().</span><span class="identifier">c_str</span><span class="special">()</span> <span class="special">)</span> <span class="special">);</span>
    <span class="special">}</span>
  <span class="special">}</span>
  <span class="keyword">return</span> <span class="keyword">true</span><span class="special">;</span>
<span class="special">}</span>
</pre>
              </td></tr></tbody>
</table></div>
<div class="informaltable"><table class="table">
<colgroup><col></colgroup>
<thead><tr><th>
                <p>
                  Output
                </p>
              </th></tr></thead>
<tbody><tr><td>
<pre xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" class="table-programlisting"><span class="preprocessor"># Example</span> <span class="identifier">run</span> <span class="number">1</span>
<span class="special">&gt;</span> <span class="identifier">runtime_configuration3</span> <span class="special">--</span><span class="identifier">log_level</span><span class="special">=</span><span class="identifier">all</span>  <span class="special">--</span> <span class="special">--</span><span class="identifier">create</span><span class="special">-</span><span class="identifier">parametrized</span> <span class="number">3</span>
<span class="identifier">Running</span> <span class="number">3</span> <span class="identifier">test</span> <span class="identifier">cases</span><span class="special">...</span>
<span class="identifier">Entering</span> <span class="identifier">test</span> <span class="identifier">module</span> <span class="string">"Master Test Suite"</span>
<span class="identifier">test</span><span class="special">.</span><span class="identifier">cpp</span><span class="special">:</span><span class="number">59</span><span class="special">:</span> <span class="identifier">Entering</span> <span class="identifier">test</span> <span class="keyword">case</span> <span class="string">"name 0"</span>
<span class="identifier">test</span><span class="special">.</span><span class="identifier">cpp</span><span class="special">:</span><span class="number">17</span><span class="special">:</span> <span class="identifier">error</span><span class="special">:</span> <span class="identifier">in</span> <span class="string">"name 0"</span><span class="special">:</span> <span class="identifier">check</span> <span class="identifier">i</span> <span class="special">&gt;=</span> <span class="number">1</span> <span class="identifier">has</span> <span class="identifier">failed</span> <span class="special">[</span><span class="number">0</span> <span class="special">&lt;</span> <span class="number">1</span><span class="special">]</span>
<span class="identifier">test</span><span class="special">.</span><span class="identifier">cpp</span><span class="special">:</span><span class="number">59</span><span class="special">:</span> <span class="identifier">Leaving</span> <span class="identifier">test</span> <span class="keyword">case</span> <span class="string">"name 0"</span><span class="special">;</span> <span class="identifier">testing</span> <span class="identifier">time</span><span class="special">:</span> <span class="number">179u</span><span class="identifier">s</span>
<span class="identifier">test</span><span class="special">.</span><span class="identifier">cpp</span><span class="special">:</span><span class="number">59</span><span class="special">:</span> <span class="identifier">Entering</span> <span class="identifier">test</span> <span class="keyword">case</span> <span class="string">"name 1"</span>
<span class="identifier">test</span><span class="special">.</span><span class="identifier">cpp</span><span class="special">:</span><span class="number">17</span><span class="special">:</span> <span class="identifier">info</span><span class="special">:</span> <span class="identifier">check</span> <span class="identifier">i</span> <span class="special">&gt;=</span> <span class="number">1</span> <span class="identifier">has</span> <span class="identifier">passed</span>
<span class="identifier">test</span><span class="special">.</span><span class="identifier">cpp</span><span class="special">:</span><span class="number">59</span><span class="special">:</span> <span class="identifier">Leaving</span> <span class="identifier">test</span> <span class="keyword">case</span> <span class="string">"name 1"</span><span class="special">;</span> <span class="identifier">testing</span> <span class="identifier">time</span><span class="special">:</span> <span class="number">45u</span><span class="identifier">s</span>
<span class="identifier">test</span><span class="special">.</span><span class="identifier">cpp</span><span class="special">:</span><span class="number">59</span><span class="special">:</span> <span class="identifier">Entering</span> <span class="identifier">test</span> <span class="keyword">case</span> <span class="string">"name 2"</span>
<span class="identifier">test</span><span class="special">.</span><span class="identifier">cpp</span><span class="special">:</span><span class="number">17</span><span class="special">:</span> <span class="identifier">info</span><span class="special">:</span> <span class="identifier">check</span> <span class="identifier">i</span> <span class="special">&gt;=</span> <span class="number">1</span> <span class="identifier">has</span> <span class="identifier">passed</span>
<span class="identifier">test</span><span class="special">.</span><span class="identifier">cpp</span><span class="special">:</span><span class="number">59</span><span class="special">:</span> <span class="identifier">Leaving</span> <span class="identifier">test</span> <span class="keyword">case</span> <span class="string">"name 2"</span><span class="special">;</span> <span class="identifier">testing</span> <span class="identifier">time</span><span class="special">:</span> <span class="number">34u</span><span class="identifier">s</span>
<span class="identifier">Leaving</span> <span class="identifier">test</span> <span class="identifier">module</span> <span class="string">"Master Test Suite"</span><span class="special">;</span> <span class="identifier">testing</span> <span class="identifier">time</span><span class="special">:</span> <span class="number">443u</span><span class="identifier">s</span>

<span class="special">***</span> <span class="number">1</span> <span class="identifier">failure</span> <span class="identifier">is</span> <span class="identifier">detected</span> <span class="identifier">in</span> <span class="identifier">the</span> <span class="identifier">test</span> <span class="identifier">module</span> <span class="string">"Master Test Suite"</span>

<span class="preprocessor"># Example</span> <span class="identifier">run</span> <span class="number">2</span>
<span class="special">&gt;</span> <span class="identifier">runtime_configuration3</span> <span class="special">--</span><span class="identifier">log_level</span><span class="special">=</span><span class="identifier">all</span>  <span class="special">--</span> <span class="special">--</span><span class="identifier">create</span><span class="special">-</span><span class="identifier">parametrized</span>
<span class="identifier">Not</span> <span class="identifier">enough</span> <span class="identifier">parameters</span>
<span class="identifier">Test</span> <span class="identifier">setup</span> <span class="identifier">error</span><span class="special">:</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">runtime_error</span><span class="special">:</span> <span class="identifier">test</span> <span class="identifier">module</span> <span class="identifier">initialization</span> <span class="identifier">failed</span>

<span class="preprocessor"># Example</span> <span class="identifier">run</span> <span class="number">3</span>
<span class="special">&gt;</span> <span class="identifier">runtime_configuration3</span> <span class="special">--</span><span class="identifier">log_level</span><span class="special">=</span><span class="identifier">all</span>  <span class="special">--</span> <span class="special">--</span><span class="identifier">create</span><span class="special">-</span><span class="identifier">parametrized</span> <span class="identifier">dummy</span>
<span class="identifier">Test</span> <span class="identifier">setup</span> <span class="identifier">error</span><span class="special">:</span> <span class="identifier">boost</span><span class="special">::</span><span class="identifier">unit_test</span><span class="special">::</span><span class="identifier">framework</span><span class="special">::</span><span class="identifier">setup_error</span><span class="special">:</span> <span class="identifier">Argument</span> <span class="char">'dummy'</span> <span class="keyword">not</span> <span class="identifier">integer</span>
</pre>
              </td></tr></tbody>
</table></div>
<p>
        As seen in this example, the error handling is quite different than a regular
        test-case:
      </p>
<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; ">
<li class="listitem">
            For the <span class="emphasis"><em>alternative</em></span> initialization API (see <a class="link" href="../utf_reference/link_references/link_boost_test_alternative_init_macro.html" title="BOOST_TEST_ALTERNATIVE_INIT_API"><code class="computeroutput"><span class="identifier">BOOST_TEST_ALTERNATIVE_INIT_API</span></code></a>),
            the easiest way to indicate an error would be to return <code class="computeroutput"><span class="keyword">false</span></code> in case of failure.
          </li>
<li class="listitem">
            For the <span class="emphasis"><em>obsolete</em></span> and <span class="emphasis"><em>alternative</em></span>,
            raising an exception such as <code class="computeroutput"><span class="identifier">std</span><span class="special">::</span><span class="identifier">runtime_error</span></code>
            or <code class="computeroutput"><a class="link" href="../../boost/unit_test/framework/setup_error.html" title="Struct setup_error">boost::unit_test::framework::setup_error</a></code>
            as above works as well.
          </li>
</ul></div>
<a name="ref_consuming_cmd_dataset"></a><h5>
<a name="boost_test.runtime_config.custom_command_line_arguments.h6"></a>
        <span class="phrase"><a name="boost_test.runtime_config.custom_command_line_arguments.data_driven_test_cases_parametri"></a></span><a class="link" href="custom_command_line_arguments.html#boost_test.runtime_config.custom_command_line_arguments.data_driven_test_cases_parametri">Data-driven
        test cases parametrized from the command line</a>
      </h5>
<p>
        It is possible to use the command line arguments to manipulate the dataset
        generated by a data-drive test case.
      </p>
<p>
        By default, datasets are created before entering the <code class="computeroutput"><span class="identifier">main</span></code>
        of the test module, and try to be efficient in the number of copies of their
        arguments. It is however possible to indicate a delay for the evaluation
        of the dataset by constructing the dataset with the <code class="computeroutput"><span class="identifier">make_delayed</span></code>
        function.
      </p>
<p>
        With the <code class="computeroutput"><span class="identifier">make_delayed</span></code>, the
        construction of the dataset will happen at the same time as the construction
        of the test tree during the test module initialization, and not before. It
        is this way possible to access the <a class="link" href="../tests_organization/test_tree/master_test_suite.html" title="Master test suite">master
        test suite</a> and its command line arguments.
      </p>
<p>
        The example below shows a complex dataset generation from the content of
        an external file. The data contained in the file participates to the definition
        of the test case.
      </p>
<h6>
<a name="boost_test.runtime_config.custom_command_line_arguments.h7"></a>
        <span class="phrase"><a name="boost_test.runtime_config.custom_command_line_arguments.example_descr2"></a></span><a class="link" href="custom_command_line_arguments.html#boost_test.runtime_config.custom_command_line_arguments.example_descr2">Example:
        Dataset test case parametrized from the command line</a>
      </h6>
<div class="informaltable"><table class="table">
<colgroup><col></colgroup>
<thead><tr><th>
                <p>
                  Code
                </p>
              </th></tr></thead>
<tbody><tr><td>
<pre xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" class="table-programlisting"><span class="preprocessor">#define</span> <span class="identifier">BOOST_TEST_MODULE</span> <span class="identifier">runtime_configuration4</span>

<span class="preprocessor">#include</span> <span class="special">&lt;</span><span class="identifier">boost</span><span class="special">/</span><span class="identifier">test</span><span class="special">/</span><span class="identifier">included</span><span class="special">/</span><span class="identifier">unit_test</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">&gt;</span>
<span class="preprocessor">#include</span> <span class="special">&lt;</span><span class="identifier">boost</span><span class="special">/</span><span class="identifier">test</span><span class="special">/</span><span class="identifier">data</span><span class="special">/</span><span class="identifier">test_case</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">&gt;</span>

<span class="preprocessor">#include</span> <span class="special">&lt;</span><span class="identifier">iostream</span><span class="special">&gt;</span>
<span class="preprocessor">#include</span> <span class="special">&lt;</span><span class="identifier">functional</span><span class="special">&gt;</span>
<span class="preprocessor">#include</span> <span class="special">&lt;</span><span class="identifier">sstream</span><span class="special">&gt;</span>
<span class="preprocessor">#include</span> <span class="special">&lt;</span><span class="identifier">fstream</span><span class="special">&gt;</span>

<span class="comment">// this dataset loads a file that contains a list of strings</span>
<span class="comment">// this list is used to create a dataset test case.</span>
<span class="keyword">class</span> <span class="identifier">file_dataset</span>
<span class="special">{</span>
<span class="keyword">private</span><span class="special">:</span>
    <span class="identifier">std</span><span class="special">::</span><span class="identifier">string</span> <span class="identifier">m_filename</span><span class="special">;</span>
    <span class="identifier">std</span><span class="special">::</span><span class="identifier">size_t</span> <span class="identifier">m_line_start</span><span class="special">;</span>
    <span class="identifier">std</span><span class="special">::</span><span class="identifier">size_t</span> <span class="identifier">m_line_end</span><span class="special">;</span>

<span class="keyword">public</span><span class="special">:</span>
    <span class="keyword">enum</span> <span class="special">{</span> <span class="identifier">arity</span> <span class="special">=</span> <span class="number">2</span> <span class="special">};</span>

<span class="keyword">public</span><span class="special">:</span>
    <span class="identifier">file_dataset</span><span class="special">(</span><span class="identifier">std</span><span class="special">::</span><span class="identifier">size_t</span> <span class="identifier">line_start</span> <span class="special">=</span> <span class="number">0</span><span class="special">,</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">size_t</span> <span class="identifier">line_end</span> <span class="special">=</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">size_t</span><span class="special">(-</span><span class="number">1</span><span class="special">))</span>
    <span class="special">:</span> <span class="identifier">m_line_start</span><span class="special">(</span><span class="identifier">line_start</span><span class="special">)</span>
    <span class="special">,</span> <span class="identifier">m_line_end</span><span class="special">(</span><span class="identifier">line_end</span><span class="special">)</span>
    <span class="special">{</span>
      <span class="keyword">int</span> <span class="identifier">argc</span> <span class="special">=</span> <span class="identifier">boost</span><span class="special">::</span><span class="identifier">unit_test</span><span class="special">::</span><span class="identifier">framework</span><span class="special">::</span><span class="identifier">master_test_suite</span><span class="special">().</span><span class="identifier">argc</span><span class="special">;</span>
      <span class="keyword">char</span><span class="special">**</span> <span class="identifier">argv</span> <span class="special">=</span> <span class="identifier">boost</span><span class="special">::</span><span class="identifier">unit_test</span><span class="special">::</span><span class="identifier">framework</span><span class="special">::</span><span class="identifier">master_test_suite</span><span class="special">().</span><span class="identifier">argv</span><span class="special">;</span>

      <span class="keyword">if</span><span class="special">(</span><span class="identifier">argc</span> <span class="special">!=</span> <span class="number">3</span><span class="special">)</span>
        <span class="keyword">throw</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">logic_error</span><span class="special">(</span><span class="string">"Incorrect number of arguments"</span><span class="special">);</span>
      <span class="keyword">if</span><span class="special">(</span><span class="identifier">std</span><span class="special">::</span><span class="identifier">string</span><span class="special">(</span><span class="identifier">argv</span><span class="special">[</span><span class="number">1</span><span class="special">])</span> <span class="special">!=</span> <span class="string">"--test-file"</span><span class="special">)</span>
        <span class="keyword">throw</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">logic_error</span><span class="special">(</span><span class="string">"First argument != '--test-file'"</span><span class="special">);</span>
      <span class="keyword">if</span><span class="special">(!(</span><span class="identifier">m_line_start</span> <span class="special">&lt;</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">size_t</span><span class="special">(-</span><span class="number">1</span><span class="special">)))</span>
        <span class="keyword">throw</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">logic_error</span><span class="special">(</span><span class="string">"Incorrect line start/end"</span><span class="special">);</span>

      <span class="identifier">m_filename</span> <span class="special">=</span> <span class="identifier">argv</span><span class="special">[</span><span class="number">2</span><span class="special">];</span>

      <span class="identifier">std</span><span class="special">::</span><span class="identifier">ifstream</span> <span class="identifier">file</span><span class="special">(</span><span class="identifier">m_filename</span><span class="special">);</span>
      <span class="keyword">if</span><span class="special">(!</span><span class="identifier">file</span><span class="special">.</span><span class="identifier">is_open</span><span class="special">())</span>
        <span class="keyword">throw</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">logic_error</span><span class="special">(</span><span class="string">"Cannot open the file '"</span> <span class="special">+</span> <span class="identifier">m_filename</span> <span class="special">+</span> <span class="string">"'"</span><span class="special">);</span>
      <span class="identifier">std</span><span class="special">::</span><span class="identifier">size_t</span> <span class="identifier">nb_lines</span> <span class="special">=</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">count_if</span><span class="special">(</span>
        <span class="identifier">std</span><span class="special">::</span><span class="identifier">istreambuf_iterator</span><span class="special">&lt;</span><span class="keyword">char</span><span class="special">&gt;(</span><span class="identifier">file</span><span class="special">),</span>
        <span class="identifier">std</span><span class="special">::</span><span class="identifier">istreambuf_iterator</span><span class="special">&lt;</span><span class="keyword">char</span><span class="special">&gt;(),</span>
        <span class="special">[](</span><span class="keyword">char</span> <span class="identifier">c</span><span class="special">){</span> <span class="keyword">return</span> <span class="identifier">c</span> <span class="special">==</span> <span class="char">'\n'</span><span class="special">;});</span>

      <span class="identifier">m_line_end</span> <span class="special">=</span> <span class="special">(</span><span class="identifier">std</span><span class="special">::</span><span class="identifier">min</span><span class="special">)(</span><span class="identifier">nb_lines</span><span class="special">,</span> <span class="identifier">m_line_end</span><span class="special">);</span>
      <span class="keyword">if</span><span class="special">(!(</span><span class="identifier">m_line_start</span> <span class="special">&lt;=</span> <span class="identifier">m_line_end</span><span class="special">))</span>
        <span class="keyword">throw</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">logic_error</span><span class="special">(</span><span class="string">"Incorrect line start/end"</span><span class="special">);</span>
    <span class="special">}</span>

    <span class="keyword">struct</span> <span class="identifier">iterator</span> <span class="special">{</span>
        <span class="identifier">iterator</span><span class="special">(</span><span class="identifier">std</span><span class="special">::</span><span class="identifier">string</span> <span class="keyword">const</span><span class="special">&amp;</span> <span class="identifier">filename</span><span class="special">,</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">size_t</span> <span class="identifier">line_start</span><span class="special">)</span>
        <span class="special">:</span> <span class="identifier">file</span><span class="special">(</span><span class="identifier">filename</span><span class="special">,</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">ios</span><span class="special">::</span><span class="identifier">binary</span><span class="special">)</span> <span class="special">{</span>
          <span class="keyword">if</span><span class="special">(!</span><span class="identifier">file</span><span class="special">.</span><span class="identifier">is_open</span><span class="special">())</span>
            <span class="keyword">throw</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">runtime_error</span><span class="special">(</span><span class="string">"Cannot open the file"</span><span class="special">);</span>
          <span class="keyword">for</span><span class="special">(</span><span class="identifier">std</span><span class="special">::</span><span class="identifier">size_t</span> <span class="identifier">i</span> <span class="special">=</span> <span class="number">0</span><span class="special">;</span> <span class="identifier">i</span> <span class="special">&lt;</span> <span class="identifier">line_start</span><span class="special">;</span> <span class="identifier">i</span><span class="special">++)</span> <span class="special">{</span>
            <span class="identifier">getline</span><span class="special">(</span><span class="identifier">file</span><span class="special">,</span> <span class="identifier">m_current_line</span><span class="special">);</span>
          <span class="special">}</span>
        <span class="special">}</span>

        <span class="keyword">auto</span> <span class="keyword">operator</span><span class="special">*()</span> <span class="keyword">const</span> <span class="special">-&gt;</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">tuple</span><span class="special">&lt;</span><span class="keyword">float</span><span class="special">,</span> <span class="keyword">float</span><span class="special">&gt;</span> <span class="special">{</span>
          <span class="keyword">float</span> <span class="identifier">a</span><span class="special">,</span> <span class="identifier">b</span><span class="special">;</span>
          <span class="identifier">std</span><span class="special">::</span><span class="identifier">istringstream</span> <span class="identifier">istr</span><span class="special">(</span><span class="identifier">m_current_line</span><span class="special">);</span>
          <span class="identifier">istr</span> <span class="special">&gt;&gt;</span> <span class="identifier">a</span> <span class="special">&gt;&gt;</span> <span class="identifier">b</span><span class="special">;</span>
          <span class="keyword">return</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">tuple</span><span class="special">&lt;</span><span class="keyword">float</span><span class="special">,</span> <span class="keyword">float</span><span class="special">&gt;(</span><span class="identifier">a</span><span class="special">,</span> <span class="identifier">b</span><span class="special">);</span>
        <span class="special">}</span>

        <span class="keyword">void</span> <span class="keyword">operator</span><span class="special">++()</span> <span class="special">{</span>
          <span class="identifier">getline</span><span class="special">(</span><span class="identifier">file</span><span class="special">,</span> <span class="identifier">m_current_line</span><span class="special">);</span>
        <span class="special">}</span>
    <span class="keyword">private</span><span class="special">:</span>
        <span class="identifier">std</span><span class="special">::</span><span class="identifier">ifstream</span> <span class="identifier">file</span><span class="special">;</span>
        <span class="identifier">std</span><span class="special">::</span><span class="identifier">string</span> <span class="identifier">m_current_line</span><span class="special">;</span>
    <span class="special">};</span>

    <span class="comment">// size of the DS</span>
    <span class="identifier">boost</span><span class="special">::</span><span class="identifier">unit_test</span><span class="special">::</span><span class="identifier">data</span><span class="special">::</span><span class="identifier">size_t</span> <span class="identifier">size</span><span class="special">()</span> <span class="keyword">const</span> <span class="special">{</span>
      <span class="keyword">return</span> <span class="identifier">m_line_end</span> <span class="special">-</span> <span class="identifier">m_line_start</span><span class="special">;</span>
    <span class="special">}</span>

    <span class="comment">// iterator over the lines of the file</span>
    <span class="identifier">iterator</span> <span class="identifier">begin</span><span class="special">()</span> <span class="keyword">const</span>   <span class="special">{</span>
      <span class="keyword">return</span> <span class="identifier">iterator</span><span class="special">(</span><span class="identifier">m_filename</span><span class="special">,</span> <span class="identifier">m_line_start</span><span class="special">);</span>
    <span class="special">}</span>
<span class="special">};</span>

<span class="keyword">namespace</span> <span class="identifier">boost</span> <span class="special">{</span> <span class="keyword">namespace</span> <span class="identifier">unit_test</span> <span class="special">{</span> <span class="keyword">namespace</span> <span class="identifier">data</span> <span class="special">{</span>

<span class="keyword">namespace</span> <span class="identifier">monomorphic</span> <span class="special">{</span>
  <span class="keyword">template</span> <span class="special">&lt;&gt;</span>
  <span class="keyword">struct</span> <span class="identifier">is_dataset</span><span class="special">&lt;</span><span class="identifier">file_dataset</span><span class="special">&gt;</span> <span class="special">:</span> <span class="identifier">boost</span><span class="special">::</span><span class="identifier">mpl</span><span class="special">::</span><span class="identifier">true_</span> <span class="special">{};</span>
<span class="special">}</span>
<span class="special">}}}</span>

<span class="identifier">BOOST_DATA_TEST_CASE</span><span class="special">(</span><span class="identifier">command_line_test_file</span><span class="special">,</span>
    <span class="identifier">boost</span><span class="special">::</span><span class="identifier">unit_test</span><span class="special">::</span><span class="identifier">data</span><span class="special">::</span><span class="identifier">make_delayed</span><span class="special">&lt;</span><span class="identifier">file_dataset</span><span class="special">&gt;(</span> <span class="number">3</span><span class="special">,</span> <span class="number">10</span> <span class="special">),</span>
    <span class="identifier">input</span><span class="special">,</span> <span class="identifier">expected</span><span class="special">)</span> <span class="special">{</span>
    <span class="identifier">BOOST_TEST</span><span class="special">(</span><span class="identifier">input</span> <span class="special">&lt;=</span> <span class="identifier">expected</span><span class="special">);</span>
<span class="special">}</span>
</pre>
              </td></tr></tbody>
</table></div>
<div class="informaltable"><table class="table">
<colgroup><col></colgroup>
<thead><tr><th>
                <p>
                  Output
                </p>
              </th></tr></thead>
<tbody><tr><td>
<pre xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" class="table-programlisting"><span class="preprocessor"># content</span> <span class="identifier">of</span> <span class="identifier">the</span> <span class="identifier">file</span>
<span class="special">&gt;</span> <span class="identifier">more</span> <span class="identifier">test_file</span><span class="special">.</span><span class="identifier">txt</span>
<span class="number">10.2</span> <span class="number">30.4</span>
<span class="number">10.3</span> <span class="number">30.2</span>
<span class="number">15.987984</span> <span class="number">15.9992</span>
<span class="number">15.997984</span> <span class="number">15.9962</span>

<span class="preprocessor"># Example</span> <span class="identifier">run</span> <span class="number">1</span>
<span class="special">&gt;</span> <span class="identifier">runtime_configuration4</span> <span class="special">--</span><span class="identifier">log_level</span><span class="special">=</span><span class="identifier">all</span>  <span class="special">--</span> <span class="special">--</span><span class="identifier">test</span><span class="special">-</span><span class="identifier">file</span> <span class="identifier">test_file</span><span class="special">.</span><span class="identifier">txt</span>
<span class="identifier">Running</span> <span class="number">2</span> <span class="identifier">test</span> <span class="identifier">cases</span><span class="special">...</span>
<span class="identifier">Entering</span> <span class="identifier">test</span> <span class="identifier">module</span> <span class="string">"runtime_configuration4"</span>
<span class="identifier">test</span><span class="special">.</span><span class="identifier">cpp</span><span class="special">:</span><span class="number">107</span><span class="special">:</span> <span class="identifier">Entering</span> <span class="identifier">test</span> <span class="identifier">suite</span> <span class="string">"command_line_test_file"</span>
<span class="identifier">test</span><span class="special">.</span><span class="identifier">cpp</span><span class="special">:</span><span class="number">107</span><span class="special">:</span> <span class="identifier">Entering</span> <span class="identifier">test</span> <span class="keyword">case</span> <span class="string">"_0"</span>
<span class="identifier">test</span><span class="special">.</span><span class="identifier">cpp</span><span class="special">:</span><span class="number">108</span><span class="special">:</span> <span class="identifier">info</span><span class="special">:</span> <span class="identifier">check</span> <span class="identifier">input</span> <span class="special">&lt;=</span> <span class="identifier">expected</span> <span class="identifier">has</span> <span class="identifier">passed</span>
<span class="identifier">Assertion</span> <span class="identifier">occurred</span> <span class="identifier">in</span> <span class="identifier">a</span> <span class="identifier">following</span> <span class="identifier">context</span><span class="special">:</span>
    <span class="identifier">input</span> <span class="special">=</span> <span class="number">15.9879837</span><span class="special">;</span> <span class="identifier">expected</span> <span class="special">=</span> <span class="number">15.9991999</span><span class="special">;</span>
<span class="identifier">test</span><span class="special">.</span><span class="identifier">cpp</span><span class="special">:</span><span class="number">107</span><span class="special">:</span> <span class="identifier">Leaving</span> <span class="identifier">test</span> <span class="keyword">case</span> <span class="string">"_0"</span><span class="special">;</span> <span class="identifier">testing</span> <span class="identifier">time</span><span class="special">:</span> <span class="number">433u</span><span class="identifier">s</span>
<span class="identifier">test</span><span class="special">.</span><span class="identifier">cpp</span><span class="special">:</span><span class="number">107</span><span class="special">:</span> <span class="identifier">Entering</span> <span class="identifier">test</span> <span class="keyword">case</span> <span class="string">"_1"</span>
<span class="identifier">test</span><span class="special">.</span><span class="identifier">cpp</span><span class="special">:</span><span class="number">108</span><span class="special">:</span> <span class="identifier">error</span><span class="special">:</span> <span class="identifier">in</span> <span class="string">"command_line_test_file/_1"</span><span class="special">:</span> <span class="identifier">check</span> <span class="identifier">input</span> <span class="special">&lt;=</span> <span class="identifier">expected</span> <span class="identifier">has</span> <span class="identifier">failed</span> <span class="special">[</span><span class="number">15.9979839</span> <span class="special">&gt;</span> <span class="number">15.9961996</span><span class="special">]</span>
<span class="identifier">Failure</span> <span class="identifier">occurred</span> <span class="identifier">in</span> <span class="identifier">a</span> <span class="identifier">following</span> <span class="identifier">context</span><span class="special">:</span>
    <span class="identifier">input</span> <span class="special">=</span> <span class="number">15.9979839</span><span class="special">;</span> <span class="identifier">expected</span> <span class="special">=</span> <span class="number">15.9961996</span><span class="special">;</span>
<span class="identifier">test</span><span class="special">.</span><span class="identifier">cpp</span><span class="special">:</span><span class="number">107</span><span class="special">:</span> <span class="identifier">Leaving</span> <span class="identifier">test</span> <span class="keyword">case</span> <span class="string">"_1"</span><span class="special">;</span> <span class="identifier">testing</span> <span class="identifier">time</span><span class="special">:</span> <span class="number">114u</span><span class="identifier">s</span>
<span class="identifier">test</span><span class="special">.</span><span class="identifier">cpp</span><span class="special">:</span><span class="number">107</span><span class="special">:</span> <span class="identifier">Leaving</span> <span class="identifier">test</span> <span class="identifier">suite</span> <span class="string">"command_line_test_file"</span><span class="special">;</span> <span class="identifier">testing</span> <span class="identifier">time</span><span class="special">:</span> <span class="number">616u</span><span class="identifier">s</span>
<span class="identifier">Leaving</span> <span class="identifier">test</span> <span class="identifier">module</span> <span class="string">"runtime_configuration4"</span><span class="special">;</span> <span class="identifier">testing</span> <span class="identifier">time</span><span class="special">:</span> <span class="number">881u</span><span class="identifier">s</span>

<span class="special">***</span> <span class="number">1</span> <span class="identifier">failure</span> <span class="identifier">is</span> <span class="identifier">detected</span> <span class="identifier">in</span> <span class="identifier">the</span> <span class="identifier">test</span> <span class="identifier">module</span> <span class="string">"runtime_configuration4"</span>

<span class="preprocessor"># Example</span> <span class="identifier">run</span> <span class="number">2</span>
<span class="special">&gt;</span> <span class="identifier">runtime_configuration4</span> <span class="special">--</span><span class="identifier">log_level</span><span class="special">=</span><span class="identifier">all</span>  <span class="special">--</span> <span class="special">--</span><span class="identifier">test</span><span class="special">-</span><span class="identifier">file</span> <span class="identifier">non</span><span class="special">-</span><span class="identifier">existant</span><span class="special">.</span><span class="identifier">txt</span>
<span class="identifier">Test</span> <span class="identifier">setup</span> <span class="identifier">error</span><span class="special">:</span> <span class="identifier">Cannot</span> <span class="identifier">open</span> <span class="identifier">the</span> <span class="identifier">file</span> <span class="char">'non-existant.txt'</span>

<span class="preprocessor"># Example</span> <span class="identifier">run</span> <span class="number">3</span>
<span class="special">&gt;</span> <span class="identifier">runtime_configuration4</span> <span class="special">--</span><span class="identifier">log_level</span><span class="special">=</span><span class="identifier">all</span>
<span class="identifier">Test</span> <span class="identifier">setup</span> <span class="identifier">error</span><span class="special">:</span> <span class="identifier">Incorrect</span> <span class="identifier">number</span> <span class="identifier">of</span> <span class="identifier">arguments</span>
</pre>
              </td></tr></tbody>
</table></div>
<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; ">
<li class="listitem">
            Using <code class="computeroutput"><span class="identifier">make_delayed</span></code>, the
            tests generated from a dataset are instantiated during the framework
            setup. This let the dataset generator access the <code class="computeroutput"><span class="identifier">argc</span></code>
            and <code class="computeroutput"><span class="identifier">argv</span></code> of the master
            test suite.
          </li>
<li class="listitem">
            The generation of the test-cases out of this dataset happens before the
            global fixture are reached (and before any test cases), and after the
            initialization function.
          </li>
<li class="listitem">
            The generator of the dataset is <span class="bold"><strong>not</strong></span>
            considered being a test case and the <span class="emphasis"><em>Unit Test Framework</em></span>
            assertions are not accessible. However, the <span class="emphasis"><em>Unit Test Framework</em></span>
            will catch the exceptions raised during the generation of the test-cases
            by the dataset. To report an error, a <code class="computeroutput"><span class="identifier">std</span><span class="special">::</span><span class="identifier">logic_error</span></code>
            or <code class="computeroutput"><a class="link" href="../../boost/unit_test/framework/setup_error.html" title="Struct setup_error">boost::unit_test::framework::setup_error</a></code>
            can be raised and will be reported by the <span class="emphasis"><em>Unit Test Framework</em></span>.
          </li>
</ul></div>
</div>
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        Distributed under the Boost Software License, Version 1.0. (See accompanying
        file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)
      </p>
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