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round conversion of floating point types: T -> std::string -> T

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[SVN r35595]
This commit is contained in:
Alexander Nasonov
2006-10-13 19:40:03 +00:00
parent 0a605d1bb3
commit 4b1ca7bdf6
1 changed files with 44 additions and 0 deletions
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44
lexical_cast_test.cpp
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@@ -67,6 +67,9 @@ void test_conversion_from_ulong();
void test_conversion_from_longlong();
void test_conversion_from_ulonglong();
#endif
void test_round_conversion_float();
void test_round_conversion_double();
void test_round_conversion_long_double();
unit_test::test_suite *init_unit_test_suite(int, char *[])
{
@@ -97,6 +100,8 @@ unit_test::test_suite *init_unit_test_suite(int, char *[])
suite->add(BOOST_TEST_CASE(&test_conversion_from_longlong));
suite->add(BOOST_TEST_CASE(&test_conversion_from_ulonglong));
#endif
suite->add(BOOST_TEST_CASE(&test_round_conversion_float));
suite->add(BOOST_TEST_CASE(&test_round_conversion_double));
return suite;
}
@@ -606,3 +611,42 @@ void test_conversion_from_ulonglong()
#endif
template<class T>
void test_round_conversion()
{
T v1 = std::numeric_limits<T>::epsilon();
std::string s1 = boost::lexical_cast<std::string>(v1);
BOOST_CHECK(v1 == lexical_cast<T>(s1));
T v2 = (std::numeric_limits<T>::max)();
std::string s2 = boost::lexical_cast<std::string>(v2);
BOOST_CHECK(v2 == lexical_cast<T>(s2));
T v3 = (std::numeric_limits<T>::min)();
std::string s3 = boost::lexical_cast<std::string>(v3);
BOOST_CHECK(v3 == lexical_cast<T>(s3));
T v4 = v2 / 137;
std::string s4 = boost::lexical_cast<std::string>(v4);
BOOST_CHECK(v4 == lexical_cast<T>(s4));
T v5 = v1 * 137;
std::string s5 = boost::lexical_cast<std::string>(v5);
BOOST_CHECK(v5 == lexical_cast<T>(s5));
}
void test_round_conversion_float()
{
test_round_conversion<float>();
}
void test_round_conversion_double()
{
test_round_conversion<double>();
}
void test_round_conversion_long_double()
{
test_round_conversion<long double>();
}