/usr/share/pyshared/zope/testrunner/shuffle.py is in python-zope.testrunner 4.0.3-3.
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#
# Copyright (c) 2004-2008 Zope Foundation and Contributors.
# All Rights Reserved.
#
# This software is subject to the provisions of the Zope Public License,
# Version 2.1 (ZPL). A copy of the ZPL should accompany this distribution.
# THIS SOFTWARE IS PROVIDED "AS IS" AND ANY AND ALL EXPRESS OR IMPLIED
# WARRANTIES ARE DISCLAIMED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
# WARRANTIES OF TITLE, MERCHANTABILITY, AGAINST INFRINGEMENT, AND FITNESS
# FOR A PARTICULAR PURPOSE.
#
##############################################################################
"""Shuffle tests discovered before executing them.
"""
import time
import random
import unittest
import zope.testrunner.feature
class Shuffle(zope.testrunner.feature.Feature):
"""Take the tests found so far and shuffle them."""
def __init__(self, runner):
super(Shuffle, self).__init__(runner)
self.active = runner.options.shuffle
self.seed = runner.options.shuffle_seed
if self.seed is None:
# We can't rely on the random modules seed initialization because
# we can't introspect the seed later for reporting. This is a
# simple emulation of what random.Random.seed does anyway.
self.seed = long(time.time() * 256) # use fractional seconds
def global_setup(self):
rng = random.Random(self.seed)
for layer, suite in list(self.runner.tests_by_layer_name.items()):
# Test suites cannot be modified through a public API. We thus
# take a mutable copy of the list of tests of that suite, shuffle
# that and replace the test suite instance with a new one of the
# same class.
tests = list(suite)
rng.shuffle(tests)
self.runner.tests_by_layer_name[layer] = suite.__class__(tests)
def report(self):
msg = "Tests were shuffled using seed number %d." % self.seed
self.runner.options.output.info(msg)
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