Broken: running individual python tests

[springmeyer]

This used to work:

$ python test/python_tests/csv_test.py
Traceback (most recent call last):
  File "test/python_tests/csv_test.py", line 13, in <module>
    from .utilities import execution_path
ValueError: Attempted relative import in non-package

//cc @flippmoke @yohanboniface - any ideas?

[yohanboniface]

Humm, yes, this cannot work, because we are doing a relative import (from .xxx).

We need that for python3 compat. I think the real answer of this issue is to have a real test runner instead of running them file by file. Do you want me to work on this?

[yohanboniface]

But aren't we using nose? You should be able to limit the ran tests to this file passing arguments to nose.

[yohanboniface]

@springmeyer python setup.py nosetests -w test/python_tests/csv_test.py ?

[springmeyer]

Is this absolutely necessary for python3? Can't we support both 2 and 3 without breaking things?

[yohanboniface]

Yes, it's absolutely necessary for python3: there is not way any more to make false relative import (i.e. import xxx where xxx is supposed to be relative).
By "breaking things", you mean that python path/to/test.py is not possible anymore? Is it a problem to replace with the line I pasted above?

[springmeyer]

By "breaking things", you mean that python path/to/test.py is not possible anymore?

Correct. This is the way I run tests that I develop.

Is it a problem to replace with the line I pasted above?

Correct, its not sufficient. Running that is slower, not easy to remember, and outputs of bunch of noise:

running nosetests
running egg_info
writing mapnik.egg-info/PKG-INFO
writing top-level names to mapnik.egg-info/top_level.txt
writing dependency_links to mapnik.egg-info/dependency_links.txt
reading manifest file 'mapnik.egg-info/SOURCES.txt'
writing manifest file 'mapnik.egg-info/SOURCES.txt'
copying build/lib.macosx-10.10-x86_64-2.7/mapnik/_mapnik.so -> mapnik
/Library/Python/2.7/site-packages/nose/config.py:435: DeprecationWarning: Use of multiple -w arguments is deprecated and support may be removed in a future release. You can get the same behavior by passing directories without the -w argument on the command line, or by using the --tests argument in a configuration file.
  DeprecationWarning)

[yohanboniface]

Running that is slower

How much slower? :) I see Ran 40 tests in 0.011s when I run it myself ;)

not easy to remember

Humm, would a Makefile entry help? Like make test path/to/file.py ?

outputs of bunch of noise

I'll see how to fix that.

[springmeyer]

Another problem @yohanboniface. But certain files, when run from the command line, are meant to print more debugging info. For example main is overridden for test/python_tests/image_encoding_speed_test.py so that running it directly will print benchmarking info. This now no longer works because your proposed workaround of doing python setup.py nosetests -w test/python_tests/image_encoding_speed_test.py does not invoke main. This is quite frustrating for me because honestly python 3 support is much less important to me than trying to get things working and I'm loosing time hitting this whenever I try to run old scripts.

[yohanboniface]

What about #53 ? :)

[lightmare]

Running individual test module like this works:

cd test/
python -m python_tests.csv_test