[Boost-users] How to make boost.test log wstring?
Alexey Badalov
Consequently, I cannot test wstring values. How can I fix this?
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OvermindDL1
> Boost.test logs to ostream, which does not have an operator for wstring.
> Consequently, I cannot test wstring values. How can I fix this?
For the time being you can convert it to a UTF-8 encoded std::string,
it will not be a perfect mapping, but may be accurate enough for your
needs until someone else suggests something better.
Gennadiy Rozental
>
> Boost.test logs to ostream, which does not have an operator for wstring.
> Consequently, I cannot test wstring values. How can I fix this?
You can send in a patch which will make Boost.Test work with both ostream and
wostream. Also you cna write an operator << (ostream&,wstring const&)
Gennadiy
Alexey Badalov
"Gennadiy Rozental" <rog...@gmail.com> wrote in message
news:loom.2010020...@post.gmane.org...
> You can send in a patch which will make Boost.Test work with both ostream
> and
> wostream. Also you cna write an operator << (ostream&,wstring const&)
I tried to put the operator above "#include <boost/test/unit_test.hpp>", but
the same error persists, and mine is not in the candidate operator overload
list displayed in the message - only operators defined in <ostream> are
listed. My operator lets me output wstrings to std::cout from test cases,
but when "boost\test\test_tools.hpp" tries to do it, it does not compile.
I am using boost 1.41.0 and vc9. Here is my code and the error:
#include <iostream>
#include <string>
std::ostream & operator << (std::ostream & stream, const std::wstring & str)
{
return stream << "std::wstring";
}
#define BOOST_TEST_MODULE const_string test
#include <boost/test/unit_test.hpp>
BOOST_AUTO_TEST_CASE(Test)
{
std::wstring wstr;
std::cout << wstr; // OK
BOOST_CHECK_EQUAL(wstr, wstr); // Error
}
test.cpp
...\boost\test\test_tools.hpp(326) : error C2679: binary '<<' : no operator
found which takes a right-hand operand of type 'const std::wstring' (or
there is no acceptable conversion)
...
while trying to match the argument list '(std::ostream, const
std::wstring)'
...\boost\test\test_tools.hpp(318) : while compiling class template
member function 'void boost::test_tools::print_log_value<T>::operator
()(std::ostream &,const T &)'
with
[
T=std::wstring
]
Gennadiy Rozental
>
>
> "Gennadiy Rozental" <rogeeff <at> gmail.com> wrote in message
> news:loom.20100206T071834-814 <at> post.gmane.org...
>
> > You can send in a patch which will make Boost.Test work with both ostream
> > and
> > wostream. Also you cna write an operator << (ostream&,wstring const&)
>
> I tried to put the operator above "#include <boost/test/unit_test.hpp>", but
> the same error persists, and mine is not in the candidate operator overload
> list displayed in the message - only operators defined in <ostream> are
Unfortunately I believe there only way to circumvent this it to define the
operator in namespace std.
Gennadiy
Alexey Badalov
> operator in namespace std.
Ah, totally forgot this can be a problem. Thanks, it works now.
Noah Roberts
>
> Boost.test logs to ostream, which does not have an operator for wstring.
> Consequently, I cannot test wstring values. How can I fix this?
One alternative is to simply use BOOST_CHECK and the == operator:
BOOST_CHECK(obj.get_wstring() == L"Expected");
Lacks the nice output, but it's quite easy.