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New test cases for forthcoming fast lexical_cast

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[SVN r34847]
This commit is contained in:
Alexander Nasonov
2006-08-07 20:36:23 +00:00
parent 0743b5982c
commit 453555619e
1 changed files with 255 additions and 0 deletions
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255
lexical_cast_test.cpp
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@@ -3,6 +3,7 @@
// See http://www.boost.org for most recent version, including documentation.
//
// Copyright Terje Sletteb<65> and Kevlin Henney, 2005.
// Copyright Alexander Nasonov, 2006.
//
// Distributed under the Boost
// Software License, Version 1.0. (See accompanying file
@@ -29,6 +30,18 @@
#define DISABLE_WIDE_CHAR_SUPPORT
#endif
#if (defined(BOOST_HAS_LONG_LONG) || defined(BOOST_HAS_MS_INT64)) \
&& !(defined(BOOST_MSVC) && BOOST_MSVC < 1300)
#define LCAST_TEST_LONGLONG
#endif
// Test all 65536 values if true:
bool const lcast_test_small_integral_types_completely = false;
// LCAST_INTEGRAL_TEST_COUNTER: use when testing all values of an integral
// types is not possible. Max. portable value is 32767.
#define LCAST_INTEGRAL_TEST_COUNTER 1000
using namespace boost;
void test_conversion_to_char();
@@ -44,6 +57,16 @@ void test_conversion_from_wstring();
void test_conversion_to_wstring();
void test_bad_lexical_cast();
void test_no_whitespace_stripping();
void test_conversion_from_short();
void test_conversion_from_ushort();
void test_conversion_from_int();
void test_conversion_from_uint();
void test_conversion_from_long();
void test_conversion_from_ulong();
#ifdef LCAST_TEST_LONGLONG
void test_conversion_from_longlong();
void test_conversion_from_ulonglong();
#endif
unit_test::test_suite *init_unit_test_suite(int, char *[])
{
@@ -64,6 +87,17 @@ unit_test::test_suite *init_unit_test_suite(int, char *[])
#endif
suite->add(BOOST_TEST_CASE(test_bad_lexical_cast));
suite->add(BOOST_TEST_CASE(test_no_whitespace_stripping));
suite->add(BOOST_TEST_CASE(&test_conversion_from_short));
suite->add(BOOST_TEST_CASE(&test_conversion_from_ushort));
suite->add(BOOST_TEST_CASE(&test_conversion_from_int));
suite->add(BOOST_TEST_CASE(&test_conversion_from_uint));
suite->add(BOOST_TEST_CASE(&test_conversion_from_ulong));
suite->add(BOOST_TEST_CASE(&test_conversion_from_long));
#ifdef LCAST_TEST_LONGLONG
suite->add(BOOST_TEST_CASE(&test_conversion_from_longlong));
suite->add(BOOST_TEST_CASE(&test_conversion_from_ulonglong));
#endif
return suite;
}
@@ -318,3 +352,224 @@ void test_no_whitespace_stripping()
BOOST_CHECK_THROW(lexical_cast<int>(" 123"), bad_lexical_cast);
BOOST_CHECK_THROW(lexical_cast<int>("123 "), bad_lexical_cast);
}
template<class CharT, class T>
std::basic_string<CharT> to_str(T t)
{
std::basic_ostringstream<CharT> o;
o << t;
return o.str();
}
template<class T, class CharT>
void test_conversion_from_integral_to_char(CharT zero)
{
BOOST_CHECK(lexical_cast<char>(static_cast<T>(0)) == zero + 0);
BOOST_CHECK(lexical_cast<char>(static_cast<T>(1)) == zero + 1);
BOOST_CHECK(lexical_cast<char>(static_cast<T>(2)) == zero + 2);
BOOST_CHECK(lexical_cast<char>(static_cast<T>(3)) == zero + 3);
BOOST_CHECK(lexical_cast<char>(static_cast<T>(4)) == zero + 4);
BOOST_CHECK(lexical_cast<char>(static_cast<T>(5)) == zero + 5);
BOOST_CHECK(lexical_cast<char>(static_cast<T>(6)) == zero + 6);
BOOST_CHECK(lexical_cast<char>(static_cast<T>(7)) == zero + 7);
BOOST_CHECK(lexical_cast<char>(static_cast<T>(8)) == zero + 8);
BOOST_CHECK(lexical_cast<char>(static_cast<T>(9)) == zero + 9);
BOOST_CHECK_THROW(lexical_cast<char>(static_cast<T>(10)), bad_lexical_cast);
T t = std::numeric_limits<T>::max();
BOOST_CHECK_THROW(lexical_cast<char>(t), bad_lexical_cast);
}
template<class T>
void test_conversion_from_integral_to_integral()
{
T t = 0;
BOOST_CHECK(lexical_cast<T>(t) == t);
t = 32767;
BOOST_CHECK(lexical_cast<short>(t) == t);
BOOST_CHECK(lexical_cast<unsigned short>(t) == t);
BOOST_CHECK(lexical_cast<int>(t) == t);
BOOST_CHECK(lexical_cast<unsigned int>(t) == t);
BOOST_CHECK(lexical_cast<long>(t) == t);
BOOST_CHECK(lexical_cast<unsigned long>(t) == t);
t = std::numeric_limits<T>::max();
BOOST_CHECK(lexical_cast<T>(t) == t);
t = std::numeric_limits<T>::min();
BOOST_CHECK(lexical_cast<T>(t) == t);
}
template<class T, class CharT>
void test_conversion_from_integral_to_string(CharT)
{
typedef std::numeric_limits<T> limits;
typedef std::basic_string<CharT> string_type;
T t;
t = limits::min();
BOOST_CHECK(lexical_cast<string_type>(t) == to_str<CharT>(t));
t = limits::max();
BOOST_CHECK(lexical_cast<string_type>(t) == to_str<CharT>(t));
if(limits::digits <= 16 && lcast_test_small_integral_types_completely)
for(t = 1 + limits::min(); t != limits::max(); ++t)
BOOST_CHECK(lexical_cast<string_type>(t) == to_str<CharT>(t));
else
{
T const min_val = limits::min();
T const max_val = limits::max();
int const counter = LCAST_INTEGRAL_TEST_COUNTER < max_val / 2 ?
LCAST_INTEGRAL_TEST_COUNTER : max_val / 2;
int i;
// Test values around min:
t = min_val;
for(i = 0; i < counter; ++i, ++t)
BOOST_CHECK(lexical_cast<string_type>(t) == to_str<CharT>(t));
// Test values around max:
t = max_val;
for(i = 0; i < counter; ++i, --t)
BOOST_CHECK(lexical_cast<string_type>(t) == to_str<CharT>(t));
// Test values around zero:
if(limits::is_signed)
for(t = -counter; t < counter; ++t)
BOOST_CHECK(lexical_cast<string_type>(t) == to_str<CharT>(t));
// Test values around 100, 1000, 10000, ...
T ten_power = 100;
for(i = 2; i <= limits::digits10; ++i, ten_power *= 10)
{
// I believe that (ten_power + 100) never overflows
for(t = ten_power - 100; t != ten_power + 100; ++t)
BOOST_CHECK(lexical_cast<string_type>(t) == to_str<CharT>(t));
}
}
}
template<class T>
void test_conversion_from_integral_for_locale()
{
test_conversion_from_integral_to_integral<T>();
test_conversion_from_integral_to_string<T>('0');
#ifndef DISABLE_WIDE_CHAR_SUPPORT
test_conversion_from_integral_to_string<T>(L'0');
#endif
}
struct restore_oldloc
{
std::locale oldloc;
~restore_oldloc() { std::locale::global(oldloc); }
};
template<class T>
void test_conversion_from_integral()
{
char const zero = '0';
signed char const szero = '0';
unsigned char const uzero = '0';
test_conversion_from_integral_to_char<T>(zero);
test_conversion_from_integral_to_char<T>(szero);
test_conversion_from_integral_to_char<T>(uzero);
#ifndef DISABLE_WIDE_CHAR_SUPPORT
wchar_t const wzero = L'0';
test_conversion_from_integral_to_char<T>(wzero);
#endif
// test_conversion_from_integral_for_locale
typedef std::numpunct<char> numpunct;
restore_oldloc guard;
std::locale const& oldloc = guard.oldloc;
std::string grouping1 = BOOST_USE_FACET(numpunct, oldloc).grouping();
std::string grouping2(grouping1);
test_conversion_from_integral_for_locale<T>();
try
{
std::locale newloc("");
std::locale::global(newloc);
grouping2 = BOOST_USE_FACET(numpunct, newloc).grouping();
}
catch(std::exception const& ex)
{
std::string msg("Failed to set system locale: ");
msg += ex.what();
BOOST_TEST_MESSAGE(msg);
}
if(grouping1 != grouping2)
test_conversion_from_integral_for_locale<T>();
if(grouping1.empty() && grouping2.empty())
BOOST_TEST_MESSAGE("Formatting with thousands_sep has not been tested");
}
void test_conversion_from_short()
{
test_conversion_from_integral<short>();
}
void test_conversion_from_ushort()
{
test_conversion_from_integral<unsigned short>();
}
void test_conversion_from_int()
{
test_conversion_from_integral<int>();
}
void test_conversion_from_uint()
{
test_conversion_from_integral<unsigned int>();
}
void test_conversion_from_ulong()
{
test_conversion_from_integral<unsigned long>();
}
void test_conversion_from_long()
{
test_conversion_from_integral<long>();
}
#if defined(BOOST_HAS_LONG_LONG)
void test_conversion_from_longlong()
{
test_conversion_from_integral<boost::long_long_type>();
}
void test_conversion_from_ulonglong()
{
test_conversion_from_integral<boost::ulong_long_type>();
}
#elif defined(LCAST_TEST_LONGLONG)
void test_conversion_from_longlong()
{
test_conversion_from_integral<__int64>();
}
void test_conversion_from_ulonglong()
{
test_conversion_from_integral<unsigned __int64>();
}
#endif