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<TITLE>The Test Tools</TITLE>
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<H3>BOOST_WARN_PREDICATE( predicate, arguments_list )<BR>
BOOST_CHECK_PREDICATE( predicate, arguments_list )<BR>
BOOST_REQUIRE_PREDICATE( predicate, arguments_list )</H3>
<P class="first-line-indented">These are generic tools used to validate
an arbitrary supplied predicate functor (there is a compile time limit
on predicate arity defined by the configurable macro BOOST_TEST_MAX_PREDICATE_ARITY).
To validate zero arity predicate use <A href="BOOST_CHECK.html" target="descr">BOOST_<level></A> tools.
In other cases prefer theses tools. The advantage of these tools is that
they show arguments runtime values in case of predicate failure.</P>
<P class="first-line-indented">The first parameter is the predicate itself.
The second parameter is
the list of predicate arguments each wrapped in round brackets (BOOST_PP
sequence format).</P>
<H4>Example: test.cpp</H4>
<PRE class="code"><SPAN class="cpp-type">bool</SPAN> moo( <SPAN class="cpp-type">int</SPAN> arg1, <SPAN class="cpp-type">int</SPAN> arg2, <SPAN class="cpp-type">int</SPAN> mod ) { <SPAN class="reserv-word">return</SPAN> ((arg1+arg2) % mod) == 0; }
<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">17</SPAN>;
<SPAN class="cpp-type">int</SPAN> j = <SPAN class="literal">15</SPAN>;
unit_test_log.set_threshold_level( log_warnings );
BOOST_WARN( moo( 12,i,j ) );
BOOST_WARN_PREDICATE( moo, (12)(i)(j) );
<SPAN class="reserv-word">return</SPAN> <SPAN class="literal">0</SPAN>;
}
</PRE>
<H4>Output:</H4>
<P class="test-output">test.cpp(7) : warning in "test_main": condition
moo( 12, i, j ) is not satisfied<BR>
test.cpp(8) : warning in "test_main":
condition moo( 12, i, j ) is not satisfied for ( 12, 17, 15 )</P>
<H4>Example: test.cpp</H4>
<PRE class="code"><SPAN class="cpp-type">int</SPAN> test.cpp( <SPAN class="cpp-type">int</SPAN>, <SPAN class="cpp-type">char</SPAN>* [] ) {
<SPAN class="cpp-type">int</SPAN> i = <SPAN class="literal">17</SPAN>;
BOOST_CHECK_PREDICATE( std::not_equal_to<<SPAN class="cpp-type">int</SPAN>>(), <SPAN class="literal">2</SPAN>, (i,<SPAN class="literal">17</SPAN>) );
<SPAN class="reserv-word">return</SPAN> <SPAN class="literal">0</SPAN>;
}
</PRE>
<H4>Output:</H4>
<P class="test-output">test.cpp(3) : error in test_main: test std::not_equal_to<int>()(i, 17)
failed for (17, 17) </P>
<DIV class="see_also">
<H4>See Also</H4>
<P class="see-also-content"><A href="BOOST_CHECK.html" target="descr">BOOST_CHECK</A></P>
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