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# testscenarios: extensions to python unittest to allow declarative
# dependency injection ('scenarios') by tests.
# Copyright (C) 2009 Robert Collins <robertc@robertcollins.net>
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
#
__all__ = [
'TestWithScenarios',
]
import unittest
from testtools.testcase import clone_test_with_new_id
from testscenarios.scenarios import generate_scenarios
class TestWithScenarios(unittest.TestCase):
"""A TestCase with support for scenarios via a scenarios attribute.
When a test object which is an instance of TestWithScenarios is run,
and there is a non-empty scenarios attribute on the object, the test is
multiplied by the run method into one test per scenario. For this to work
reliably the TestWithScenarios.run method must not be overriden in a
subclass (or overridden compatibly with TestWithScenarios).
"""
def _get_scenarios(self):
return getattr(self, 'scenarios', None)
def countTestCases(self):
scenarios = self._get_scenarios()
if not scenarios:
return 1
else:
return len(scenarios)
def debug(self):
scenarios = self._get_scenarios()
if scenarios:
for test in generate_scenarios(self):
test.debug()
else:
return super(TestWithScenarios, self).debug()
def run(self, result=None):
scenarios = self._get_scenarios()
if scenarios:
for test in generate_scenarios(self):
test.run(result)
return
else:
return super(TestWithScenarios, self).run(result)
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