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4 <title>Customizing the module's entry point</title>
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26 <div class="titlepage"><div><div><h4 class="title">
27 <a name="boost_test.adv_scenarios.single_header_customizations.entry_point"></a><a class="link" href="entry_point.html" title="Customizing the module's entry point">Customizing
28 the module's entry point</a>
29 </h4></div></div></div>
31 In this usage variant and in the translation unit containing the definition
32 of <a class="link" href="../../utf_reference/link_references/link_boost_test_module_macro.html" title="BOOST_TEST_MODULE"><code class="computeroutput"><span class="identifier">BOOST_TEST_MODULE</span></code></a>, you need to
33 define the macros <a class="link" href="../../utf_reference/link_references/link_boost_test_no_main.html" title="BOOST_TEST_NO_MAIN"><code class="computeroutput"><span class="identifier">BOOST_TEST_NO_MAIN</span></code></a> and <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>
34 (their values are irrelevant) prior to including any of the framework's
35 headers. Next, you have to define your custom entry point, and invoke the
36 default <a class="link" href="../test_module_runner_overview.html" title="Test module runner">test
37 runner</a> <code class="computeroutput"><span class="identifier">unit_test_main</span></code>
38 manually with the default <a class="link" href="../test_module_init_overview.html" title="Test module's initialization">initialization
39 function</a> <code class="computeroutput"><span class="identifier">init_unit_test</span></code>
43 <a name="boost_test.adv_scenarios.single_header_customizations.entry_point.h0"></a>
44 <span class="phrase"><a name="boost_test.adv_scenarios.single_header_customizations.entry_point.example_descr"></a></span><a class="link" href="entry_point.html#boost_test.adv_scenarios.single_header_customizations.entry_point.example_descr">Example:
45 using custom entry point</a>
47 <div class="informaltable"><table class="table">
48 <colgroup><col></colgroup>
55 <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">custom_main</span>
56 <span class="preprocessor">#define</span> <span class="identifier">BOOST_TEST_NO_MAIN</span>
57 <span class="preprocessor">#define</span> <span class="identifier">BOOST_TEST_ALTERNATIVE_INIT_API</span>
58 <span class="preprocessor">#include</span> <span class="special"><</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">></span>
59 <span class="preprocessor">#include</span> <span class="special"><</span><span class="identifier">iostream</span><span class="special">></span>
60 <span class="keyword">namespace</span> <span class="identifier">utf</span> <span class="special">=</span> <span class="identifier">boost</span><span class="special">::</span><span class="identifier">unit_test</span><span class="special">;</span>
62 <span class="identifier">BOOST_AUTO_TEST_CASE</span><span class="special">(</span><span class="identifier">test1</span><span class="special">)</span>
63 <span class="special">{</span>
64 <span class="identifier">BOOST_TEST</span><span class="special">(</span><span class="keyword">false</span><span class="special">);</span>
65 <span class="special">}</span>
67 <span class="keyword">void</span> <span class="identifier">make_use_of</span><span class="special">(</span><span class="keyword">char</span><span class="special">**)</span>
68 <span class="special">{</span>
69 <span class="identifier">std</span><span class="special">::</span><span class="identifier">cout</span> <span class="special"><<</span> <span class="string">"Using custom entry point..."</span> <span class="special"><<</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">endl</span><span class="special">;</span>
70 <span class="special">}</span>
72 <span class="keyword">int</span> <span class="identifier">main</span><span class="special">(</span><span class="keyword">int</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="keyword">char</span><span class="special">*</span> <span class="identifier">envp</span><span class="special">[])</span>
73 <span class="special">{</span>
74 <span class="identifier">make_use_of</span><span class="special">(</span><span class="identifier">envp</span><span class="special">);</span>
75 <span class="keyword">return</span> <span class="identifier">utf</span><span class="special">::</span><span class="identifier">unit_test_main</span><span class="special">(</span><span class="identifier">init_unit_test</span><span class="special">,</span> <span class="identifier">argc</span><span class="special">,</span> <span class="identifier">argv</span><span class="special">);</span>
76 <span class="special">}</span>
80 <div class="informaltable"><table class="table">
81 <colgroup><col></colgroup>
88 <pre xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" class="table-programlisting"><span class="special">></span> <span class="identifier">custom_main</span>
89 <span class="identifier">Using</span> <span class="identifier">custom</span> <span class="identifier">entry</span> <span class="identifier">point</span><span class="special">...</span>
90 <span class="identifier">Running</span> <span class="number">1</span> <span class="identifier">test</span> <span class="keyword">case</span><span class="special">...</span>
91 <span class="identifier">test</span><span class="special">.</span><span class="identifier">cpp</span><span class="special">(</span><span class="number">10</span><span class="special">):</span> <span class="identifier">error</span><span class="special">:</span> <span class="identifier">in</span> <span class="string">"test1"</span><span class="special">:</span> <span class="identifier">check</span> <span class="keyword">false</span> <span class="identifier">has</span> <span class="identifier">failed</span>
93 <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">"custom_main"</span>
98 In the above example, a custom entry point was selected because the test
99 module, in addition to command line arguments, needs to obtain also the
100 information about environment variables.
102 <div class="note"><table border="0" summary="Note">
104 <td rowspan="2" align="center" valign="top" width="25"><img alt="[Note]" src="../../../../../../../doc/src/images/note.png"></td>
105 <th align="left">Note</th>
107 <tr><td align="left" valign="top"><p>
108 The above example also illustrates that it makes sense to define both
109 <a class="link" href="../../utf_reference/link_references/link_boost_test_module_macro.html" title="BOOST_TEST_MODULE"><code class="computeroutput"><span class="identifier">BOOST_TEST_MODULE</span></code></a> and <a class="link" href="../../utf_reference/link_references/link_boost_test_no_main.html" title="BOOST_TEST_NO_MAIN"><code class="computeroutput"><span class="identifier">BOOST_TEST_NO_MAIN</span></code></a>. This way,
110 no <code class="computeroutput"><span class="identifier">main</span></code> is generated
111 by the framework, but the name specified by <a class="link" href="../../utf_reference/link_references/link_boost_test_module_macro.html" title="BOOST_TEST_MODULE"><code class="computeroutput"><span class="identifier">BOOST_TEST_MODULE</span></code></a> is assigned
112 to the <a class="link" href="../../tests_organization/test_tree/master_test_suite.html" title="Master test suite">Master
116 <div class="note"><table border="0" summary="Note">
118 <td rowspan="2" align="center" valign="top" width="25"><img alt="[Note]" src="../../../../../../../doc/src/images/note.png"></td>
119 <th align="left">Note</th>
121 <tr><td align="left" valign="top"><p>
122 The reason for defining <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>
123 is described <a class="link" href="../obsolete_init_func.html" title="The obsolete initialization function">here</a>.
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