[Boost-bugs] [Boost C++ Libraries] #5615: BOOST_CHECK_EQUAL does not work well with const static members

Subject: [Boost-bugs] [Boost C++ Libraries] #5615: BOOST_CHECK_EQUAL does not work well with const static members
From: Boost C++ Libraries (noreply_at_[hidden])
Date: 2011-06-16 16:58:37

#5615: BOOST_CHECK_EQUAL does not work well with const static members
------------------------------+---------------------------------------------
 Reporter:  anonymous         |       Owner:  rogeeff
     Type:  Feature Requests  |      Status:  new    
Milestone:  To Be Determined  |   Component:  test   
  Version:  Boost 1.45.0      |    Severity:  Problem
 Keywords:                    |  
------------------------------+---------------------------------------------
 I have tried to create set of test cases using
 BOOST_AUTO_TEST_CASE_TEMPLATE() macro. Each tested class shares the same
 interface, but values returned from functions are different. Therefore I
 decided to use helper traits template to avoid code duplication. Each
 traits struct contains arguments and expected results for tested classes,
 stored as static const values - see example below. Unfortunately this code
 does not link successfully - linker complains about missing static struct
 members. Fortunately workaround is simple - just copy expected value to
 temporary variable and use it in BOOST_CHECK_EQUAL().

 Please fix this to allow this code to compile and link successfully,
 without using workaround.

 {{{
 class SomeClass
 {
 public:
     int test(int arg)
     {
         return arg + 1;
     }
 };

 BOOST_AUTO_TEST_SUITE( Test_err )

     template<typename TClass>
     struct Tested_class_traits;

     template<>
     struct Tested_class_traits<SomeClass>
     {
         static const int arg = 1;
         static const int result = 2;
     };

     typedef boost::mpl::list<
         SomeClass
     > Tested_types;

     BOOST_AUTO_TEST_CASE_TEMPLATE( Test_err_test, TClass, Tested_types )
     {
         typedef Tested_class_traits<TClass> TestTraits;

         TClass obj;
         BOOST_CHECK_EQUAL( obj.test(TestTraits::arg), TestTraits::result
 );
     }

 BOOST_AUTO_TEST_SUITE_END()
 }}}

-- 
Ticket URL: <https://svn.boost.org/trac/boost/ticket/5615>
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