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65 lines
3.2 KiB
HTML
65 lines
3.2 KiB
HTML
<HTML>
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<HEAD>
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<TITLE>The Test Tools</TITLE>
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<LINK rel="stylesheet" type="text/css" href="../../../style/btl.css" media="screen">
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<LINK rel="stylesheet" type="text/css" href="../../../style/btl-print.css" media="print">
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<META http-equiv="Content-Language" content="en-us">
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<META http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
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<STYLE type="text/css">
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H4
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{
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margin: 0px;
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}
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</STYLE>
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</HEAD>
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<BODY>
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<DIV class="body">
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<H3>BOOST_CHECK_PREDICATE( predicate, predicate_arity, arguments_list ) </H3>
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<P class="first-line-indented">This tool is used to validate the supplied predicate functor. This test
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tool is generic. It allows to validate arbitrary one or two arity predicate. To validate zero or more
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then two arity predicate use <A href="BOOST_CHECK.html" target="descr">BOOST_CHECK</A> tool. The advantage
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of this tool is that shows arguments values in case of predicate failure.</P>
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<P class="first-line-indented">If predicate produces <I>true</I> value, the tool produces a confirmation
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message (note: to manage what messages appear in the test output stream set the proper log level),
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in other case it produces an error message in a form "error in ...: test <predicate>( arguments
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list ) fail for (arguments values)".</P>
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<P class="first-line-indented">The tools first parameter is the predicate itself. The tools second parameter
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the predicate arity. The last third argument is wrapped in round brackets, comma separated list of
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predicate arguments.</P>
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<H4>Example: test.cpp</H4>
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<PRE class="code"><SPAN class="cpp-type">bool</SPAN> is_even( <SPAN class="cpp-type">int</SPAN> i ) {
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<SPAN class="reserv-word">return</SPAN> i%<SPAN class="literal">2</SPAN> == <SPAN class="literal">0</SPAN>;
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}
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<SPAN class="cpp-type">int</SPAN> test.cpp( <SPAN class="cpp-type">int</SPAN>, <SPAN class="cpp-type">char</SPAN>* [] ) {
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<SPAN class="cpp-type">int</SPAN> i = <SPAN class="literal">17</SPAN>;
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BOOST_CHECK_PREDICATE( &is_even, <SPAN class="literal">1</SPAN>, (i) );
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<SPAN class="reserv-word">return</SPAN> <SPAN class="literal">0</SPAN>;
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}
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</PRE>
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<H4>Output:</H4>
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<P class="test-output">test.cpp(3) : error in test_main: test &is_even(i) failed for 17 </P>
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<H4>Example: test.cpp</H4>
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<PRE class="code"><SPAN class="cpp-type">int</SPAN> test.cpp( <SPAN class="cpp-type">int</SPAN>, <SPAN class="cpp-type">char</SPAN>* [] ) {
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<SPAN class="cpp-type">int</SPAN> i = <SPAN class="literal">17</SPAN>;
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BOOST_CHECK_PREDICATE( std::not_equal_to<<SPAN class="cpp-type">int</SPAN>>(), <SPAN class="literal">2</SPAN>, (i,<SPAN class="literal">17</SPAN>) );
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<SPAN class="reserv-word">return</SPAN> <SPAN class="literal">0</SPAN>;
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}
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</PRE>
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<H4>Output:</H4>
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<P class="test-output">test.cpp(3) : error in test_main: test std::not_equal_to<int>()(i, 17)
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failed for (17, 17) </P>
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<DIV class="see_also">
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<H4>See Also</H4>
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<P class="see-also-content"><A href="BOOST_CHECK.html" target="descr">BOOST_CHECK</A></P>
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</DIV>
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</DIV>
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</BODY>
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</HTML>
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<!-- Copyright Gennadiy Rozental 2001-2004.
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Distributed under the Boost Software License, Version 1.0.
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(See accompanying file LICENSE_1_0.txt or copy at www.boost.org/LICENSE_1_0.txt) -->
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