Parameterizing a test using CppUnit

Question

My organization is using CppUnit and I am trying to run the same test using different parameters. Running a loop inside the test is not a good option as any failure will abo

Answer 1

Based on consumerwhore answer, I ended up with a very nice approach where I can create multiple tests using a one-line registration macro with as many parameters I want.

Just define a parameter class:

class Param
{
public:
    Param( int param1, std::string param2 ) :
        m_param1( param1 ),
        m_param2( param2 )
    {
    }

    int m_param1;
    std::string m_param2;
};

Make your test fixture use it as "non-type template parameter" (I think that's how it's called):

template 
class my_test : public CPPUNIT_NS::TestFixture
{
    CPPUNIT_TEST_SUITE(my_test);
    CPPUNIT_TEST( doProcessingTest );
    CPPUNIT_TEST_SUITE_END();

    void doProcessingTest()
    {
        std::cout << "Testing with " << T.m_param1 << " and " << T.m_param2 << std::endl;
    };
};

Have a small macro creating a parameter and registering a new test fixture:

#define REGISTER_TEST_WITH_PARAMS( name, param1, param2 ) \
    Param name( param1, param2 ); \
    CPPUNIT_TEST_SUITE_REGISTRATION(my_test);

Finally, add as many tests you want like that:

REGISTER_TEST_WITH_PARAMS( test1, 1, "foo" );
REGISTER_TEST_WITH_PARAMS( test2, 3, "bar" );

Executing this test will give you:

my_test::doProcessingTestTesting with 1 and foo : OK
my_test::doProcessingTestTesting with 3 and bar : OK
OK (2)
Test completed, after 0 second(s). Press enter to exit