Re: [Pyunit-interest] JPython compat

[Steve P. <ste...@ya...>]

Rob Giardina wrote:
> Does anyone have a pointer on the incompatibility with JPython? The doc
> expressly says it's not compatible...

Hi Rob,

I didn't make any great effort to make PyUnit run identically in CPython and
JPython for a few reasons.

Firstly, there's already JUnit, and its TestCase class can be directly
subclassed in JPython. Why reinvent the wheel, I thought?

Secondly, any future GUI test runner for PyUnit would not work with JPython,
since it would most probably use Tkinter. And since JPython subclasses of
PyUnit's TestCase class don't work with JUnit, PyUnit would end up needing
its own JPython clone of JUnit's GUI. Doesn't sound like the Simplest Thing
That Could Possibly Work.

Thirdly, I've found JPython disappointing, and most efforts to make
non-trivial code work identically in CPython and JPython end up in a big mess.
Although I use JPython quite a lot, I restrict its use to those situations
in which I know it works, and I use the old JPython rather than the new one
because it feels more solid.

Technically, the reason for the current incompatibility is that for
readability of error printouts, I tweak the traceback object a little.
JPython's traceback objects are different to those of CPython, so that
code will not work with JPython.

Now...

I hear that with a few changes in 'unittest.py', PyUnit in its current
incarnation *does* work with JPython. So, if text output only is okay, I
would be happy to share the secret incantations!

I'd love to hear about how well (or not) subclassing JUnit's UnitTest works
with JPython, too.

Best wishes,

-Steve P.

-- 
Steve Purcell,  Technical Director, Inkontact
Get in touch at http://www.inkontact.com/