A micro unittest suite harness for Python
Latest commit f8b9054 Jul 12, 2010 @trentm tweak to language


This is my own hacky micro test harness for Python unittests. It is currently in use in a number of projects with large test cases. However, you might want to checkout "nose" or "unittest2" first. :) Some features include:

  • small, you can just put this one file in your "test" dir
  • no external dependencies other than the stdlib
  • tagging of individual and groups of tests to allow easily running test subsets (can be very helpful in huge doc sets)
  • support for "TestSkipped" as a return from a test (TODO: has modern unittest.py added this now?). This is helpful for tests of platform-dependent or optional features.


A typical Python project setup (at least for me) is:

foo/                # project foo
        foo.py      # the main code of the project
        testlib.py  # the testlib.py from *this project*
        test.py     # a small stub driver
        test_foo.py # an actual test file with TestCase's
        test_bar.py # another test file

Minimally the "test.py" driver is:

import sys, os
import testlib
# Put the 'lib' dir on sys.path.
sys.path.insert(0, join(dirname(dirname(abspath(__file__))), "lib"))

Then you run:

cd test 
python test.py

The test harness will find all TestCase classes in all "test_*.py" files and run them. Tagging support allows you to run subsets of the full test suite:

python test.py foo      # Just run tests in "test_foo.py"
python test.py bar      # ... just in "test_bar.py"

If "test_bar.py" looked something like this:

import unittest
from testlib import tag
class BlahTestCase(unittest.TestCase):
    def test_whozit(self):
    def test_whatzit(self):
    def test_thatzit(self):

The then following would be possible:

python test.py blah         # run all tests in `BlahTestCase`
python test.py question     # run all tests tagged "question"
python test.py -- -question # run all test *except* those tagged "question"
python test.py whozit       # run just `BlahTestCase.test_whozit`

See "Naming and Tagging" below for more details.

Example Output


Naming and Tagging


Gathering from Multiple Test Directories


Real-world examples