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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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35
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_integer);
BOOST_TEST(lim::is_signed); 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 infinity = lim::infinity();
const T qnan = lim::quiet_NaN(); const T qnan = lim::quiet_NaN();
const T snan = lim::signaling_NaN(); const T snan = lim::signaling_NaN();
// make sure those values are not 0 or similar nonsense
std::cout << "IEEE-compatible: " << lim::is_iec559 std::cout << "IEEE-compatible: " << lim::is_iec559
<< ", traps: " << lim::traps << ", traps: " << lim::traps
<< ", bounded: " << lim::is_bounded << ", bounded: " << lim::is_bounded
@@ -89,13 +81,29 @@ void test_float_limits(const T &, const char * msg)
print_hex_val(qnan, "qnan"); print_hex_val(qnan, "qnan");
print_hex_val(snan, "snan"); print_hex_val(snan, "snan");
// infinity is beyond the representable range
BOOST_TEST(lim::max() > 1000); 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);
BOOST_TEST(lim::min() < 0.001);
BOOST_TEST(lim::epsilon() > 0);
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;
}
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 // NaNs shall always compare "false" when compared for equality
// If one of these fail, your compiler may be optimizing incorrectly // If one of these fail, your compiler may be optimizing incorrectly
BOOST_TEST(! (qnan == 42)); BOOST_TEST(! (qnan == 42));
@@ -108,6 +116,9 @@ void test_float_limits(const T &, const char * msg)
// BOOST_TEST(! (qnan > 42)); // BOOST_TEST(! (qnan > 42));
// 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;
}
} }