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<TITLE>The Test Tools</TITLE>
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<H3>BOOST_WARN( predicate )<BR>BOOST_CHECK( predicate )<BR>BOOST_REQUIRE( predicate )</H3>
<P class="first-line-indented">These tools are used to validate the predicate
value. The only parameter for these tools is a boolean
predicate value that gets validated. It could be any expression that could
be evaluated and converted to boolean value. The expression gets evaluated
only once, so it's safe to pass complex expression for validation.</P>
<H4>Example: test.cpp</H4>
<PRE class="code"><SPAN class="cpp-type">int</SPAN> test_main( <SPAN class="cpp-type">int</SPAN>, <SPAN class="cpp-type">char</SPAN>* [] ) {
<SPAN class="cpp-type">int</SPAN> i=<SPAN class="literal">2</SPAN>;
BOOST_WARN( <SPAN class="reserv-word">sizeof</SPAN>(<SPAN class="cpp-type">int</SPAN>) == <SPAN class="reserv-word">sizeof</SPAN>(<SPAN class="cpp-type">short</SPAN>) );
BOOST_CHECK( i == <SPAN class="literal">1</SPAN> );
BOOST_REQUIRE( i > <SPAN class="literal">5</SPAN> );
BOOST_CHECK( i == <SPAN class="literal">6</SPAN> ); <SPAN class="comment">// will never reach this check</SPAN>
<SPAN class="reserv-word">return</SPAN> <SPAN class="literal">0</SPAN>;
}</PRE>
<H4>Output:</H4>
<P class="test-output">test.cpp(3) : warning in test_main: condition sizeof(int)
== sizeof(short) is not satisfied<BR>
test.cpp(4) : error in test_main: test i==1 failed<BR>
test.cpp(5) : fatal error
in test_main: test i>5 failed</P>
<DIV class="see_also">
<H4>See Also</H4>
<P class="see-also-content"><A href="BOOST_CHECK_MESSAGE.html" target="descr">BOOST_CHECK_MESSAGE</A></P>
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