Re: Bug or misunderstanding?

----- Original Message -----
From: "Duane Murphy" <[email protected]>
To: <Sebastian.Unger-VauGlhdcN0kbaKI5Sqam5EEOCMrvLtNR@public.gmane.org>; "CppUnit Developers"
<[email protected]>
Sent: Friday, December 20, 2002 12:00 AM
Subject: Re: [Cppunit-devel] Bug or misunderstanding?


> --- At Fri, 20 Dec 2002 11:45:45 +1300,
> Sebastian.Unger-VauGlhdcN0kbaKI5Sqam5EEOCMrvLtNR@public.gmane.org wrote:
>
> >Hi,
> >
> >I'm just starting on a new project and we are going to use CppUnit as a
> >framework for our tests. Right now I'm working on the UI part of the
> >application and so I started out with creating a Fixture that contains a
> >UserInterface object as a member and has a static suite() function just
as
> >described in the CookBook. The suite creates two (for now) TestCallers
and
> >pass in test methods of the fixture. I expected one Fixture (and therefor
> >one UserInterface) to be created and that all the testmethods are called
on
> >this one object (framed by calles to setUp() and tearDown() which reset
the
> >UI object to a
> >known state.)
> >
> >However, it turned out that for each TestCaller instantiated one Fixture
> >was instantiated and the testmethods were each called on a different
> >Fixture object. This resulted in multiple UI objects to be created and
> >since they create threads each calling a display driver which only
expects
> >calls from one UI at a time ..... I think you can imagine ...
> >
> >My understanding came from the following text from the CookBook:
> >
> >"Ordinarily, you'll have many little test cases that you'll want to run
on
> >the same set of objects. To do this use a fixture.      [...]  A fixture
is
> >a known set of objects that serves as a base for a set of test cases."
> >
> >
> >Now my question is: Am I doing something wrong or is this a bug in
CppUnit
> >or is this intended behaviour (in which case I think the docu should be
> >updated.)?
> >
> >Also if this is intended, can you give me just a pointer on how to do
this
> >kind of thing? Should I subclass TestSuite and keep the persistent
objects
> >there?
>
> Others that work on CppUnit can speak up for why it is this way. I have
> long considered this a bug. CppUnit likes calling new() :-). They
> instiate a new Fixture() for each test case. You will have to work around
> it somehow.

This is a normal behavior. It provides maximum isolation between each test
case of the fixture. As far as I know JUnit behave the same way.

> CppUnit likes calling new() :-).

What do you mean ?

Baptiste.

[...]
>  ...Duane





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