On Mon, Nov 19, 2012 at 7:11 AM, Ethan Jucovy <ethan.juc...@gmail.com>wrote:
> On Mon, Nov 19, 2012 at 1:07 AM, RjOllos <ry...@physiosonics.com> wrote:
>
>> When I put `print` statements inside a unit test case I don't see any
>> output in the console window. Any idea of why this might be?
>>
>> I know it's not the most elegant way to debug, but sometimes the quickest
>> way to get some info about a variable when debugging some Trac code,
>> particularly since I'm still a beginning with python and not proficient
>> with pdb and other tools that exist.
>>
>
> Python testrunners like to swallow output from print statements,
> unfortunately. Some also like to swallow pdb breakpoints.
>
> I believe the Right Way to do this sort of debugging in tests is to use
> Python's logging framework. But I'm always too lazy to look this up. I
> usually end up doing ``logfile = open("/tmp/test.log", "a"); print >>
> logfile, "log message"; logfile.close();`` instead, and `tail -f
> /tmp/test.log` in another console window while I run my tests.
>
Oh, the other Lazy Approach I sometimes use is to just bypass the
testrunner and execute my test file directly with `python
path/to/my/tests.py`. Depending on how the tests are written, this may or
may not work. For example most of Trac core's tests do run properly this
way -- `python trac/tests/perm.py` etc works fine.
When it does work it's really convenient -- you're in a normal Python
environment, you can print and pdb all you want, and also you can be really
selective about which tests you're running. (When I'm doing this I will
often just comment out lines in the `suite()` definition so that I'm only
executing the test I'm debugging at the moment. Then I just need to
remember to restore the full test suite before I do a final-real-test-run
and commit.)
I'm sure there are Right Ways to do these things too but as a bad habit I
highly recommend this method. :-)
-Ethan
--
You received this message because you are subscribed to the Google Groups "Trac
Development" group.
To post to this group, send email to trac-dev@googlegroups.com.
To unsubscribe from this group, send email to
trac-dev+unsubscr...@googlegroups.com.
For more options, visit this group at
http://groups.google.com/group/trac-dev?hl=en.
