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<div class="titlepage"><div><div><h3 class="title">
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<a name="boost_test.users_guide.module_initialization"></a><a class="link" href="module_initialization.html" title="Test module initialization">Test module
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initialization</a>
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</h3></div></div></div>
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<div class="toc"><dl class="toc">
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<dt><span class="section"><a href="module_initialization/original_initialization_function.html">Original
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initialization function</a></span></dt>
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<dt><span class="section"><a href="module_initialization/alternative_initialization_funct.html">Alternative
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initialization function</a></span></dt>
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<dt><span class="section"><a href="module_initialization/initialization_function_signatur.html">Initialization
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function signature access</a></span></dt>
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<dt><span class="section"><a href="module_initialization/automated_generation.html">Automated
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generation</a></span></dt>
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</dl></div>
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<p>
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There are two tasks that you may need to perform before actual testing can
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start:
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</p>
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<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; ">
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<li class="listitem">
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The test tree needs to be built (unless you are using automated test
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units registration).
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</li>
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<li class="listitem">
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Custom <span class="emphasis"><em>test module initialization</em></span> needs to be performed.
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This includes initialization of the code under test and custom tune-up
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of the <span class="emphasis"><em>UTF</em></span> parameters (for example the test log
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or the test results report output streams redirection).
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</li>
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</ul></div>
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<p>
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The function dedicated for this purpose is called <span class="emphasis"><em>the test module
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initialization function</em></span>. Alternatively you can employ global fixtures,
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covered in details, including differences in two approaches, in the <a class="link" href="../tests_organization/fixtures.html" title="Fixtures">fixtures</a> section.
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</p>
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<p>
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The <span class="emphasis"><em>UTF</em></span> requires you to implement the test module initialization
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function. The test runner supplied with the static library or single-header
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variants of the <span class="emphasis"><em>UTF</em></span> requires the specific function specification.
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The test runner supplied with the dynamic library variant of the <span class="emphasis"><em>UTF</em></span>
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requires the specific initialization function signature only.
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</p>
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<div class="warning"><table border="0" summary="Warning">
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<tr>
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<td rowspan="2" align="center" valign="top" width="25"><img alt="[Warning]" src="../../../../../../../doc/src/images/warning.png"></td>
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<th align="left">Warning</th>
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</tr>
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<tr><td align="left" valign="top"><p>
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TO FIX: specific specification
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</p></td></tr>
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</table></div>
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<p>
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For many <a class="link" href="../section_glossary.html#ref_test_module">test modules</a> you don't need
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to do any custom initialization and test tree construction is automated.
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In this case you don't really need the initialization function and the <span class="emphasis"><em>UTF</em></span>
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provides a way to automatically generate an empty one for you.
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</p>
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<p>
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Original design of the <span class="emphasis"><em>UTF</em></span> supported the manual test
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tree construction only. Later versions introduced the automated registration
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of test units. In later versions of the <span class="emphasis"><em>UTF</em></span> the original
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initialization function specification became inconvenient and unnecessary
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unsafe. So the alternative initialization function specification was introduced.
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This change is not backward compatible. The test runners supplied with the
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static library and single-header variants of the <span class="emphasis"><em>UTF</em></span>
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by default still require original initialization function specification,
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but support <link linkend="utf.compilation.flags">compilation
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flags</link> that switch to the alternative one. The test runner supplied
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with dynamic library variant of the <span class="emphasis"><em>UTF</em></span> requires new
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specification and doesn't support original one. The plan is to deprecate
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the original initialization function specification in one of the future releases
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and ultimately to stop supporting it.
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</p>
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<p>
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The initialization function invocation is monitored by the <span class="emphasis"><em>UTF</em></span>
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the same way as all the test cases. An unexpected exception or system error
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detected during initialization function invocation is treated as initialization
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error and is reported as such.
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</p>
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</div>
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<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
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<td align="left"></td>
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<td align="right"><div class="copyright-footer">Copyright © 2001-2014 Gennadiy
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Rozental<p>
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Distributed under the Boost Software License, Version 1.0. (See accompanying
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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>)
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</p>
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