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refactored tests to account for numeric_limits<>::has_XXX flags

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[SVN r10193]
This commit is contained in:
Jens Maurer
2001-05-22 21:26:45 +00:00
parent 11291104a5
commit 3987d988e0
1 changed files with 34 additions and 23 deletions
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57
limits_test.cpp
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@ -66,18 +66,10 @@ void test_float_limits(const T &, const char * msg)
BOOST_TEST(!lim::is_integer);
BOOST_TEST(lim::is_signed);
BOOST_TEST(lim::epsilon() > 0);
BOOST_TEST(lim::has_infinity);
BOOST_TEST(lim::has_quiet_NaN);
BOOST_TEST(lim::has_signaling_NaN);
const T infinity = lim::infinity();
const T qnan = lim::quiet_NaN();
const T snan = lim::signaling_NaN();
// make sure those values are not 0 or similar nonsense
std::cout << "IEEE-compatible: " << lim::is_iec559
<< ", traps: " << lim::traps
<< ", bounded: " << lim::is_bounded
@ -89,25 +81,44 @@ void test_float_limits(const T &, const char * msg)
print_hex_val(qnan, "qnan");
print_hex_val(snan, "snan");
// infinity is beyond the representable range
BOOST_TEST(lim::max() > 1000);
BOOST_TEST(lim::infinity() > lim::max());
BOOST_TEST(-lim::infinity() < -lim::max());
BOOST_TEST(lim::min() < 0.001);
BOOST_TEST(lim::min() > 0);
BOOST_TEST(lim::min() < 0.001);
BOOST_TEST(lim::epsilon() > 0);
// NaNs shall always compare "false" when compared for equality
// If one of these fail, your compiler may be optimizing incorrectly
BOOST_TEST(! (qnan == 42));
BOOST_TEST(! (qnan == qnan));
BOOST_TEST(qnan != 42);
BOOST_TEST(qnan != qnan);
if(lim::is_iec559) {
BOOST_TEST(lim::has_infinity);
BOOST_TEST(lim::has_quiet_NaN);
BOOST_TEST(lim::has_signaling_NaN);
} else {
std::cout << "Does not claim IEEE conformance" << std::endl;
}
// The following tests may cause arithmetic traps etc. Avoid for now.
// BOOST_TEST(! (qnan < 42));
// BOOST_TEST(! (qnan > 42));
// BOOST_TEST(! (qnan <= 42));
// BOOST_TEST(! (qnan >= 42));
if(lim::has_infinity) {
// make sure those values are not 0 or similar nonsense
// infinity is beyond the representable range
BOOST_TEST(infinity > lim::max());
BOOST_TEST(-infinity < -lim::max());
} else {
std::cout << "Does not have infinity" << std::endl;
}
if(lim::has_quiet_NaN) {
// NaNs shall always compare "false" when compared for equality
// If one of these fail, your compiler may be optimizing incorrectly
BOOST_TEST(! (qnan == 42));
BOOST_TEST(! (qnan == qnan));
BOOST_TEST(qnan != 42);
BOOST_TEST(qnan != qnan);
// The following tests may cause arithmetic traps etc. Avoid for now.
// BOOST_TEST(! (qnan < 42));
// BOOST_TEST(! (qnan > 42));
// BOOST_TEST(! (qnan <= 42));
// BOOST_TEST(! (qnan >= 42));
} else {
std::cout << "Does not have QNaN" << std::endl;
}
}