/usr/lib/python2.7/dist-packages/fixtures/tests/test_fixture.py is in python-fixtures 1.3.1-2.
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#
# Copyright (c) 2010, 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 types
import testtools
from testtools.content import text_content
from testtools.testcase import skipIf
import fixtures
from fixtures.fixture import gather_details
from fixtures.tests.helpers import LoggingFixture
require_gather_details = skipIf(gather_details is None,
"gather_details() is not available.")
# Note: the cleanup related tests are strictly speaking redundant, IFF they are
# replaced with contract tests for correct use of CallMany.
class TestFixture(testtools.TestCase):
def test_resetCallsSetUpCleanUp(self):
calls = []
class FixtureWithSetupOnly(fixtures.Fixture):
def setUp(self):
super(FixtureWithSetupOnly, self).setUp()
calls.append('setUp')
self.addCleanup(calls.append, 'cleanUp')
fixture = FixtureWithSetupOnly()
fixture.setUp()
fixture.reset()
fixture.cleanUp()
self.assertEqual(['setUp', 'cleanUp', 'setUp', 'cleanUp'], calls)
def test_reset_raises_if_cleanup_raises(self):
class FixtureWithSetupOnly(fixtures.Fixture):
def do_raise(self):
raise Exception('foo')
def setUp(self):
super(FixtureWithSetupOnly, self).setUp()
self.addCleanup(self.do_raise)
fixture = FixtureWithSetupOnly()
fixture.setUp()
exc = self.assertRaises(Exception, fixture.reset)
self.assertEqual(('foo',), exc.args)
def test_cleanUp_raise_first_false_callscleanups_returns_exceptions(self):
calls = []
def raise_exception1():
calls.append('1')
raise Exception('woo')
def raise_exception2():
calls.append('2')
raise Exception('woo')
class FixtureWithException(fixtures.Fixture):
def setUp(self):
super(FixtureWithException, self).setUp()
self.addCleanup(raise_exception2)
self.addCleanup(raise_exception1)
fixture = FixtureWithException()
fixture.setUp()
exceptions = fixture.cleanUp(raise_first=False)
self.assertEqual(['1', '2'], calls)
# There should be two exceptions
self.assertEqual(2, len(exceptions))
# They should be a sys.exc_info tuple.
self.assertEqual(3, len(exceptions[0]))
type, value, tb = exceptions[0]
self.assertEqual(Exception, type)
self.assertIsInstance(value, Exception)
self.assertEqual(('woo',), value.args)
self.assertIsInstance(tb, types.TracebackType)
def test_exit_propogates_exceptions(self):
fixture = fixtures.Fixture()
fixture.__enter__()
self.assertEqual(False, fixture.__exit__(None, None, None))
def test_exit_runs_all_raises_first_exception(self):
calls = []
def raise_exception1():
calls.append('1')
raise Exception('woo')
def raise_exception2():
calls.append('2')
raise Exception('hoo')
class FixtureWithException(fixtures.Fixture):
def setUp(self):
super(FixtureWithException, self).setUp()
self.addCleanup(raise_exception2)
self.addCleanup(raise_exception1)
fixture = FixtureWithException()
fixture.__enter__()
exc = self.assertRaises(Exception, fixture.__exit__, None, None, None)
self.assertEqual(('woo',), exc.args[0][1].args)
self.assertEqual(('hoo',), exc.args[1][1].args)
self.assertEqual(['1', '2'], calls)
def test_useFixture(self):
parent = LoggingFixture('-outer')
nested = LoggingFixture('-inner', calls=parent.calls)
parent.setUp()
parent.useFixture(nested)
parent.cleanUp()
self.assertEqual(
['setUp-outer', 'setUp-inner', 'cleanUp-inner', 'cleanUp-outer'],
parent.calls)
@require_gather_details
def test_useFixture_details_captured_from_setUp(self):
# Details added during fixture set-up are gathered even if setUp()
# fails with an unknown exception.
class SomethingBroke(Exception): pass
class BrokenFixture(fixtures.Fixture):
def setUp(self):
super(BrokenFixture, self).setUp()
self.addDetail('content', text_content("foobar"))
raise SomethingBroke()
broken_fixture = BrokenFixture()
class SimpleFixture(fixtures.Fixture):
def setUp(self):
super(SimpleFixture, self).setUp()
self.useFixture(broken_fixture)
simple_fixture = SimpleFixture()
self.assertRaises(SomethingBroke, simple_fixture.setUp)
self.assertEqual(
{"content": text_content("foobar")},
broken_fixture.getDetails())
self.assertEqual(
{"content": text_content("foobar")},
simple_fixture.getDetails())
@require_gather_details
def test_useFixture_details_captured_from_setUp_MultipleExceptions(self):
# Details added during fixture set-up are gathered even if setUp()
# fails with (cleanly - with MultipleExceptions / SetupError).
class SomethingBroke(Exception): pass
class BrokenFixture(fixtures.Fixture):
def _setUp(self):
self.addDetail('content', text_content("foobar"))
raise SomethingBroke()
class SimpleFixture(fixtures.Fixture):
def _setUp(self):
self.useFixture(BrokenFixture())
simple = SimpleFixture()
e = self.assertRaises(fixtures.MultipleExceptions, simple.setUp)
self.assertEqual(
{"content": text_content("foobar")},
e.args[-1][1].args[0])
def test_getDetails(self):
fixture = fixtures.Fixture()
with fixture:
self.assertEqual({}, fixture.getDetails())
def test_details_from_child_fixtures_are_returned(self):
parent = fixtures.Fixture()
with parent:
child = fixtures.Fixture()
parent.useFixture(child)
# Note that we add the detail *after* using the fixture: the parent
# has to query just-in-time.
child.addDetail('foo', 'content')
self.assertEqual({'foo': 'content'}, parent.getDetails())
# And dropping it from the child drops it from the parent.
del child._details['foo']
self.assertEqual({}, parent.getDetails())
# After cleanup the child details are still gone.
child.addDetail('foo', 'content')
self.assertRaises(TypeError, parent.getDetails)
def test_duplicate_details_are_disambiguated(self):
parent = fixtures.Fixture()
with parent:
parent.addDetail('foo', 'parent-content')
child = fixtures.Fixture()
parent.useFixture(child)
# Note that we add the detail *after* using the fixture: the parent
# has to query just-in-time.
child.addDetail('foo', 'child-content')
self.assertEqual({'foo': 'parent-content',
'foo-1': 'child-content',}, parent.getDetails())
def test_addDetail(self):
fixture = fixtures.Fixture()
with fixture:
fixture.addDetail('foo', 'content')
self.assertEqual({'foo': 'content'}, fixture.getDetails())
del fixture._details['foo']
self.assertEqual({}, fixture.getDetails())
fixture.addDetail('foo', 'content')
# Cleanup clears the details too.
self.assertRaises(TypeError, fixture.getDetails)
def test_setUp_subclassed(self):
# Even though its no longer recommended, we need to be sure that
# overriding setUp and calling super().setUp still works.
class Subclass(fixtures.Fixture):
def setUp(self):
super(Subclass, self).setUp()
self.fred = 1
self.addCleanup(setattr, self, 'fred', 2)
with Subclass() as f:
self.assertEqual(1, f.fred)
self.assertEqual(2, f.fred)
def test__setUp(self):
# _setUp is called, and cleanups can be registered by it.
class Subclass(fixtures.Fixture):
def _setUp(self):
self.fred = 1
self.addCleanup(setattr, self, 'fred', 2)
with Subclass() as f:
self.assertEqual(1, f.fred)
self.assertEqual(2, f.fred)
def test__setUp_fails(self):
# when _setUp fails, the fixture is left ready-to-setUp, and any
# details added during _setUp are captured.
class Subclass(fixtures.Fixture):
def _setUp(self):
self.addDetail('log', text_content('stuff'))
1/0
f = Subclass()
e = self.assertRaises(fixtures.MultipleExceptions, f.setUp)
self.assertRaises(TypeError, f.cleanUp)
self.assertIsInstance(e.args[0][1], ZeroDivisionError)
self.assertIsInstance(e.args[1][1], fixtures.SetupError)
self.assertEqual('stuff', e.args[1][1].args[0]['log'].as_text())
def test__setUp_fails_cleanUp_fails(self):
# when _setUp fails, cleanups are called, and their failure is captured
# into the MultipleExceptions instance.
class Subclass(fixtures.Fixture):
def _setUp(self):
self.addDetail('log', text_content('stuff'))
self.addCleanup(lambda: 1/0)
raise Exception('fred')
f = Subclass()
e = self.assertRaises(fixtures.MultipleExceptions, f.setUp)
self.assertRaises(TypeError, f.cleanUp)
self.assertEqual(Exception, e.args[0][0])
self.assertEqual(ZeroDivisionError, e.args[1][0])
self.assertEqual(fixtures.SetupError, e.args[2][0])
self.assertEqual('stuff', e.args[2][1].args[0]['log'].as_text())
def test_setup_failures_with_base_exception(self):
# when _setUp fails with a BaseException (or subclass thereof) that
# exception is propogated as is, but we still call cleanups etc.
class MyBase(BaseException):pass
log = []
class Subclass(fixtures.Fixture):
def _setUp(self):
self.addDetail('log', text_content('stuff'))
self.addCleanup(log.append, 'cleaned')
raise MyBase('fred')
f = Subclass()
e = self.assertRaises(MyBase, f.setUp)
self.assertRaises(TypeError, f.cleanUp)
self.assertEqual(['cleaned'], log)
class TestFunctionFixture(testtools.TestCase):
def test_setup_only(self):
fixture = fixtures.FunctionFixture(lambda: 42)
fixture.setUp()
self.assertEqual(42, fixture.fn_result)
fixture.cleanUp()
self.assertFalse(hasattr(fixture, 'fn_result'))
def test_cleanup(self):
results = []
fixture = fixtures.FunctionFixture(lambda: 84, results.append)
fixture.setUp()
self.assertEqual(84, fixture.fn_result)
self.assertEqual([], results)
fixture.cleanUp()
self.assertEqual([84], results)
def test_reset(self):
results = []
expected = [21, 7]
def setUp():
return expected.pop(0)
def reset(result):
results.append(('reset', result))
return expected.pop(0)
fixture = fixtures.FunctionFixture(setUp, results.append, reset)
fixture.setUp()
self.assertEqual([], results)
fixture.reset()
self.assertEqual([('reset', 21)], results)
self.assertEqual(7, fixture.fn_result)
fixture.cleanUp()
self.assertEqual([('reset', 21), 7], results)
class TestMethodFixture(testtools.TestCase):
def test_no_setup_cleanup(self):
class Stub:
pass
fixture = fixtures.MethodFixture(Stub())
fixture.setUp()
fixture.reset()
self.assertIsInstance(fixture.obj, Stub)
fixture.cleanUp()
def test_setup_only(self):
class Stub:
def setUp(self):
self.value = 42
fixture = fixtures.MethodFixture(Stub())
fixture.setUp()
self.assertEqual(42, fixture.obj.value)
self.assertIsInstance(fixture.obj, Stub)
fixture.cleanUp()
def test_cleanup_only(self):
class Stub:
value = None
def tearDown(self):
self.value = 42
fixture = fixtures.MethodFixture(Stub())
fixture.setUp()
self.assertEqual(None, fixture.obj.value)
self.assertIsInstance(fixture.obj, Stub)
fixture.cleanUp()
self.assertEqual(42, fixture.obj.value)
def test_cleanup(self):
class Stub:
def setUp(self):
self.value = 42
def tearDown(self):
self.value = 84
fixture = fixtures.MethodFixture(Stub())
fixture.setUp()
self.assertEqual(42, fixture.obj.value)
self.assertIsInstance(fixture.obj, Stub)
fixture.cleanUp()
self.assertEqual(84, fixture.obj.value)
def test_custom_setUp(self):
class Stub:
def mysetup(self):
self.value = 42
obj = Stub()
fixture = fixtures.MethodFixture(obj, setup=obj.mysetup)
fixture.setUp()
self.assertEqual(42, fixture.obj.value)
self.assertEqual(obj, fixture.obj)
fixture.cleanUp()
def test_custom_cleanUp(self):
class Stub:
value = 42
def mycleanup(self):
self.value = None
obj = Stub()
fixture = fixtures.MethodFixture(obj, cleanup=obj.mycleanup)
fixture.setUp()
self.assertEqual(42, fixture.obj.value)
self.assertEqual(obj, fixture.obj)
fixture.cleanUp()
self.assertEqual(None, fixture.obj.value)
def test_reset(self):
class Stub:
def setUp(self):
self.value = 42
def tearDown(self):
self.value = 84
def reset(self):
self.value = 126
obj = Stub()
fixture = fixtures.MethodFixture(obj, reset=obj.reset)
fixture.setUp()
self.assertEqual(obj, fixture.obj)
self.assertEqual(42, obj.value)
fixture.reset()
self.assertEqual(126, obj.value)
fixture.cleanUp()
self.assertEqual(84, obj.value)
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