Re: Unit Test Framework: Class Test Cases

From: rogeeff (rogeeff_at_[hidden])
Date: 2001-12-21 13:03:04

--- In boost_at_y..., "Fernando Cacciola" <fcacciola_at_g...> wrote:
> > > This should be properly documented.
> >
> > >From the documentation:
> >
> >  "The class_test_case is responsible for the creation and the
> > destroying of the user's test class instance. It's recommended to 
use
> > the class_test_case *only* if you can't implement a test logic in 
a
> > free function."
> >
> I see.
> Then this paragraph should be referenced in

Sorry. I did not get. Where?

[...]

> > In reality usage of class_test_case is limited to the situations
> > where you for any reason need to share information between test
> > cases. The instance of user class is just a storage for this
> > information. As an example let say you are testing very heavy 
class
> > A. So you have test_construction test case and test_access test 
case.
> > You could want to use preconstructed object in a test_access and
> > construct it in test_construction.
> >
> Could you give a concrete example?

struct test_A {
   A a;
   void test_constructor() {
      a.add( part );
      a.add( part );
      a.add( part );

      // validate a is properly constructed
   }

   void test_access() {
     BOOST_CHECK_EQUAL( a.get( key ), value );
     ...
   }
}

[...]

> >
> The problem is that I need to transfer information from the command 
line
> into the test case.
> How can I do that with a free function?
> 
> (of course I could use gobal static data, but I was hoping that no 
to be
> necessary)

Good catch. Right away you should be able to use an extention and 
bind needed argument to the free function with arguments, like this

void foo( char const* arg )
{
   ... 
}

test->add( BOOST_TEST_CASE( boost::bind( foo, _1, argv[2] );

Hopefully bind will take care about lifetime of arguments. Is it, 
Piter?

Though the problem seems to be pretty generic and worth adding to the 
base implementation. I could add an ability for the user to specify a 
ninstance of user test case as an optional argument to 
BOOST_TEST_CASE like this:

BOOST_TEST_CASE(( &A::foo )); // here framework will create an 
instance

A* a = new A(...)
BOOST_TEST_CASE(( &A::foo, a )); // here framework will use the 
instance provided and DESTROY it at the end.

How about this?

> 
> Thanks,
> 
> Fernando Cacciola
> Sierra s.r.l.
> fcacciola_at_g...
> www.gosierra.com

Gennadiy.