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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="reserv-word">define</SPAN> BOOST_TEST_MAIN<BR>#<SPAN class="reserv-word">include</SPAN> <<SPAN class="literal">boost/test/unit_test.hpp</SPAN>><BR>
BOOST_AUTO_TEST_CASE( test )
{
<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>
}</PRE>
<H4>Output:</H4>
<P class="test-output">Running 1 test case...<BR>
test.cpp(7): warning in "test": condition sizeof(int) == sizeof(short)
is not satisfied<BR>
test.cpp(8): error in "test": check i == 1 failed<BR>
test.cpp(9): fatal error in "test": critical check i > 5 failed<BR><BR>
*** 2 failures detected in test suite "Master Test Suite"</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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