The testrunner includes the ability to profile the test execution with cProfile via the –profile=cProfile option:
>>> import os, sys, tempfile
>>> 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, '--profile=cProfile']
When the tests are run, we get profiling output:
>>> from zope import testrunner
>>> testrunner.run_internal(defaults)
Running...
...
ncalls tottime percall cumtime percall filename:lineno(function)...
...
Profiling also works across layers:
>>> sys.argv = [testrunner_script, '-ssample2', '--profile=cProfile',
... '--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 cProfiler 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)