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BOOST_WARN_SMALL(value, tolerance); BOOST_CHECK_SMALL(value, tolerance); BOOST_REQUIRE_SMALL(value, tolerance);
These tools are used to check that supplied value is small enough. The
"smallness" is defined by absolute value of the tolerance supplied
as a second argument. Use these tools with caution. To compare to values
on closeness it's preferable to use BOOST_<level>_CLOSE
tools instead.
The first parameter is the value to check. The second parameter is the tolerance.
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Note |
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The floating point comparison tools are automatically added if the Unit
Test Framework is included as indicated in the previous sections.
The tools are implemented is in the header |
Code |
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#define BOOST_TEST_MODULE example #include <boost/test/included/unit_test.hpp> #include <boost/test/tools/floating_point_comparison.hpp> BOOST_AUTO_TEST_CASE( test ) { double v = -1.23456e-3; BOOST_CHECK_SMALL( v, 0.000001 ); } |
Output |
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> example Running 1 test case... test.cpp(11): error in "test": absolute value of v{-0.00123456} exceeds 1e-006 *** 1 failures is detected in test suite "example" |
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