boost::cnv::wstream wcnv;
BOOST_TEST(convert<int>(L"11", wcnv(std::hex)).value_or(0) == 17);
BOOST_TEST(convert<int>(L"11", wcnv(std::oct)).value_or(0) == 9);
BOOST_TEST(convert<int>(L"11", wcnv(std::dec)).value_or(0) == 11);
BOOST_TEST(convert<wstring>(254, wcnv(arg::base = cnv::base::dec)).value_or(L"bad") == L"254");
BOOST_TEST(convert<wstring>(254, wcnv(arg::base = cnv::base::hex)).value_or(L"bad") == L"fe");
BOOST_TEST(convert<wstring>(254, wcnv(arg::base = cnv::base::oct)).value_or(L"bad") == L"376");
boost::cnv::wstream wcnv;
wcnv(std::noskipws);
BOOST_TEST( convert<int>( L"123", wcnv).value_or(0) == 123);
BOOST_TEST(!convert<int>( L" 123", wcnv));
BOOST_TEST(!convert<int>(L" 123 ", wcnv));
wcnv(std::skipws);
BOOST_TEST( convert<int>( L" 123", wcnv).value_or(0) == 123);
BOOST_TEST(!convert<int>(L" 123 ", wcnv));