[Boost-testing] BOOST_CHECK_EQUAL on user-defined type

Subject: [Boost-testing] BOOST_CHECK_EQUAL on user-defined type
From: Jaros³aw Bober (jaroslaw.bober_at_[hidden])
Date: 2011-11-13 11:27:58

Hello,
This is my first post on this list. I'm working with boost test for some
time now and I find it very nice to work with.
I'm making tests for a legacy code and so I would like to have macro that
compares some huge objects.

I'm looking for some information on the subject, but i couldn't find good
example in docs nor in mailing list.
I would like to have good diagnostic information in console when comparing
type that I defined.

Here's my example:

class MyClass
{
    public:
    int a;
    int b;
};
bool operator==(MyClass expected, MyClass received)
{
    return (expected.a == received.a) && (expected.b == received.b);
}
std::ostream& operator<<(std::ostream& str,MyClass const& myClass)
{
    str << "MyClass::a: " << myClass.a << " MyClass::b: " << myClass.b ;
    return str;
}

Now I have a test case:

BOOST_AUTO_TEST_CASE( test )
{
    MyClass expected,received ;
    expected.a = expected.b = received.a = 1;
    received.b = 2;

    BOOST_CHECK_EQUAL( expected, received );
}
it gives me these results:
test.cpp(72): error in "test": check expected == received failed
[MyClass::a: 1
 MyClass::b: 1 != MyClass::a: 1 MyClass::b: 2]

And I have a question. Is there possibility that in results i'll see only
those members that failed assertion?
like
[expected.b: 1 != received.b: 2]

without having to manually search for failed member?

Regards