Profiling

The testrunner supports hotshot and cProfile profilers. Hotshot profiler support does not work with python2.6

>>> import os.path, sys, tempfile
>>> profiler = '--profile=hotshot'
>>> if sys.hexversion >= 0x02060000:
...     profiler = '--profile=cProfile'

The testrunner includes the ability to profile the test execution with hotshot via the –profile option, if it a python <= 2.6

>>> directory_with_tests = os.path.join(this_directory, 'testrunner-ex')
>>> sys.path.append(directory_with_tests)

>>> tempdir = tempfile.mkdtemp(prefix='zope.testrunner-')

>>> defaults = [
...     '--path', directory_with_tests,
...     '--tests-pattern', '^sampletestsf?$',
...     '--profile-directory', tempdir,
...     ]

>>> sys.argv = [testrunner_script, profiler]

When the tests are run, we get profiling output.

>>> from zope import testrunner
>>> testrunner.run_internal(defaults)
Running zope.testrunner.layer.UnitTests tests:
...
Running samplelayers.Layer1 tests:
...
Running samplelayers.Layer11 tests:
...
   ncalls  tottime  percall  cumtime  percall filename:lineno(function)
...
Total: ... tests, 0 failures, 0 errors and 0 skipped in ... seconds.
False

Profiling also works across layers.

>>> sys.argv = [testrunner_script, '-ssample2', profiler,
...             '--tests-pattern', 'sampletests_ntd']
>>> testrunner.run_internal(defaults)
Running...
  Tear down ... not supported...
   ncalls  tottime  percall  cumtime  percall filename:lineno(function)...

The testrunner creates temnporary files containing hotshot profiler data:

>>> os.listdir(tempdir)
['tests_profile.cZj2jt.prof', 'tests_profile.yHD-so.prof']

It deletes these when rerun. We’ll delete these ourselves:

>>> import shutil
>>> shutil.rmtree(tempdir)