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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>
#
# Licensed under either the Apache License, Version 2.0 or the BSD 3-clause
# license at the users choice. A copy of both licenses are available in the
# project source as Apache-2.0 and BSD. You may not use this file except in
# compliance with one of these two licences.
#
# Unless required by applicable law or agreed to in writing, software
# distributed under these licenses is distributed on an "AS IS" BASIS, WITHOUT
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
# license you chose for the specific language governing permissions and
# limitations under that license.
import unittest
import testscenarios
from testscenarios.scenarios import (
apply_scenario,
apply_scenarios,
generate_scenarios,
)
import testtools
from testtools.tests.helpers import LoggingResult
class TestGenerateScenarios(testtools.TestCase):
def hook_apply_scenarios(self):
self.addCleanup(setattr, testscenarios.scenarios, 'apply_scenarios',
apply_scenarios)
log = []
def capture(scenarios, test):
log.append((scenarios, test))
return apply_scenarios(scenarios, test)
testscenarios.scenarios.apply_scenarios = capture
return log
def test_generate_scenarios_preserves_normal_test(self):
class ReferenceTest(unittest.TestCase):
def test_pass(self):
pass
test = ReferenceTest("test_pass")
log = self.hook_apply_scenarios()
self.assertEqual([test], list(generate_scenarios(test)))
self.assertEqual([], log)
def test_tests_with_scenarios_calls_apply_scenarios(self):
class ReferenceTest(unittest.TestCase):
scenarios = [('demo', {})]
def test_pass(self):
pass
test = ReferenceTest("test_pass")
log = self.hook_apply_scenarios()
tests = list(generate_scenarios(test))
self.assertEqual(
'testscenarios.tests.test_scenarios.ReferenceTest.test_pass(demo)',
tests[0].id())
self.assertEqual([([('demo', {})], test)], log)
def test_all_scenarios_yielded(self):
class ReferenceTest(unittest.TestCase):
scenarios = [('1', {}), ('2', {})]
def test_pass(self):
pass
test = ReferenceTest("test_pass")
tests = list(generate_scenarios(test))
self.assertEqual(
'testscenarios.tests.test_scenarios.ReferenceTest.test_pass(1)',
tests[0].id())
self.assertEqual(
'testscenarios.tests.test_scenarios.ReferenceTest.test_pass(2)',
tests[1].id())
def test_scenarios_attribute_cleared(self):
class ReferenceTest(unittest.TestCase):
scenarios = [
('1', {'foo': 1, 'bar': 2}),
('2', {'foo': 2, 'bar': 4})]
def test_check_foo(self):
pass
test = ReferenceTest("test_check_foo")
tests = list(generate_scenarios(test))
for adapted in tests:
self.assertEqual(None, adapted.scenarios)
def test_multiple_tests(self):
class Reference1(unittest.TestCase):
scenarios = [('1', {}), ('2', {})]
def test_something(self):
pass
class Reference2(unittest.TestCase):
scenarios = [('3', {}), ('4', {})]
def test_something(self):
pass
suite = unittest.TestSuite()
suite.addTest(Reference1("test_something"))
suite.addTest(Reference2("test_something"))
tests = list(generate_scenarios(suite))
self.assertEqual(4, len(tests))
class TestApplyScenario(testtools.TestCase):
def test_apply_scenario_sets_id_and_attributes(self):
class ReferenceTest(unittest.TestCase):
def test_pass(self):
pass
test = ReferenceTest("test_pass")
result = apply_scenario(('demo', {'foo': 'bar'}), test)
self.assertEqual(
'testscenarios.tests.test_scenarios.ReferenceTest.test_pass(demo)',
result.id())
self.assertEqual('bar', result.foo)
class TestApplyScenarios(testtools.TestCase):
def test_calls_apply_scenario(self):
self.addCleanup(setattr, testscenarios.scenarios, 'apply_scenario',
apply_scenario)
log = []
def capture(scenario, test):
log.append((scenario, test))
testscenarios.scenarios.apply_scenario = capture
scenarios = ["foo", "bar"]
result = list(apply_scenarios(scenarios, "test"))
self.assertEqual([('foo', 'test'), ('bar', 'test')], log)
def test_preserves_scenarios_attribute(self):
class ReferenceTest(unittest.TestCase):
scenarios = [('demo', {})]
def test_pass(self):
pass
test = ReferenceTest("test_pass")
tests = list(apply_scenarios(ReferenceTest.scenarios, test))
self.assertEqual([('demo', {})], ReferenceTest.scenarios)
self.assertEqual(ReferenceTest.scenarios, tests[0].scenarios)
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