97 lines
2.8 KiB
C++
97 lines
2.8 KiB
C++
// Unit test for boost::lexical_cast.
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//
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// See http://www.boost.org for most recent version, including documentation.
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//
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// Copyright Alexander Nasonov, 2006.
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//
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// Distributed under the Boost
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// Software License, Version 1.0. (See accompanying file
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// LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt).
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//
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// Test round-tripping conversion FPT -> string -> FPT,
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// where FPT is Floating Point Type.
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#include <boost/config.hpp>
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#if defined(__INTEL_COMPILER)
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#pragma warning(disable: 193 383 488 981 1418 1419)
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#elif defined(BOOST_MSVC)
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#pragma warning(disable: 4097 4100 4121 4127 4146 4244 4245 4511 4512 4701 4800)
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#endif
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#include <boost/lexical_cast.hpp>
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#include <boost/test/unit_test.hpp>
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using namespace boost;
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void test_round_conversion_float();
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void test_round_conversion_double();
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void test_round_conversion_long_double();
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unit_test::test_suite *init_unit_test_suite(int, char *[])
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{
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unit_test::test_suite *suite =
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BOOST_TEST_SUITE("lexical_cast unit test");
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suite->add(BOOST_TEST_CASE(&test_round_conversion_float));
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suite->add(BOOST_TEST_CASE(&test_round_conversion_double));
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suite->add(BOOST_TEST_CASE(&test_round_conversion_long_double));
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return suite;
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}
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template<class T>
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void test_round_conversion()
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{
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T epsilon = std::numeric_limits<T>::epsilon();
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std::string const epsilon_s = boost::lexical_cast<std::string>(epsilon);
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BOOST_CHECK(epsilon == lexical_cast<T>(epsilon_s));
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T max_ = (std::numeric_limits<T>::max)();
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std::string const max_s = boost::lexical_cast<std::string>(max_);
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BOOST_CHECK(max_ == lexical_cast<T>(max_s));
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T min_ = (std::numeric_limits<T>::min)();
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std::string const min_s = boost::lexical_cast<std::string>(min_);
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BOOST_CHECK(min_ == lexical_cast<T>(min_s));
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T max_div137 = max_ / 137;
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std::string max_div137_s = boost::lexical_cast<std::string>(max_div137);
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BOOST_CHECK(max_div137 == lexical_cast<T>(max_div137_s));
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T epsilon_mult137 = epsilon * 137;
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std::string epsilon_mult137_s(lexical_cast<std::string>(epsilon_mult137));
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BOOST_CHECK(epsilon_mult137 == lexical_cast<T>(epsilon_mult137_s));
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}
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// See bug http://tinyurl.com/vhpvo
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template<class T>
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void test_msvc_magic_values()
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{
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T magic_msvc = 0.00010000433948393407;
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std::string magic_msvc_s = boost::lexical_cast<std::string>(magic_msvc);
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BOOST_CHECK(magic_msvc == lexical_cast<T>(magic_msvc_s));
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}
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void test_round_conversion_float()
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{
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test_round_conversion<float>();
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}
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void test_round_conversion_double()
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{
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test_round_conversion<double>();
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test_msvc_magic_values<double>();
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}
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void test_round_conversion_long_double()
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{
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// We do not run tests on compilers with bugs
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#ifndef BOOST_MATH_NO_LONG_DOUBLE_MATH_FUNCTIONS
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test_round_conversion<long double>();
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test_msvc_magic_values<long double>();
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#endif
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BOOST_CHECK(true);
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}
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