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# -*- coding: utf-8 -*-
# Copyright (C) 2013 Yahoo! Inc. All Rights Reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License"); you may
# not use this file except in compliance with the License. You may obtain
# a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
# License for the specific language governing permissions and limitations
# under the License.
from taskflow import exceptions as exc
from taskflow import states
from taskflow import test
class TransitionTest(test.TestCase):
_DISALLOWED_TPL = "Transition from '%s' to '%s' was found to be disallowed"
_NOT_IGNORED_TPL = "Transition from '%s' to '%s' was not ignored"
def assertTransitionAllowed(self, from_state, to_state):
msg = self._DISALLOWED_TPL % (from_state, to_state)
self.assertTrue(self.check_transition(from_state, to_state), msg=msg)
def assertTransitionIgnored(self, from_state, to_state):
msg = self._NOT_IGNORED_TPL % (from_state, to_state)
self.assertFalse(self.check_transition(from_state, to_state), msg=msg)
def assertTransitionForbidden(self, from_state, to_state):
self.assertRaisesRegex(exc.InvalidState,
self.transition_exc_regexp,
self.check_transition, from_state, to_state)
def assertTransitions(self, from_state, allowed=None, ignored=None,
forbidden=None):
for a in allowed or []:
self.assertTransitionAllowed(from_state, a)
for i in ignored or []:
self.assertTransitionIgnored(from_state, i)
for f in forbidden or []:
self.assertTransitionForbidden(from_state, f)
class CheckFlowTransitionTest(TransitionTest):
def setUp(self):
super(CheckFlowTransitionTest, self).setUp()
self.check_transition = states.check_flow_transition
self.transition_exc_regexp = '^Flow transition.*not allowed'
def test_to_same_state(self):
self.assertTransitionIgnored(states.SUCCESS, states.SUCCESS)
def test_rerunning_allowed(self):
self.assertTransitionAllowed(states.SUCCESS, states.RUNNING)
def test_no_resuming_from_pending(self):
self.assertTransitionIgnored(states.PENDING, states.RESUMING)
def test_resuming_from_running(self):
self.assertTransitionAllowed(states.RUNNING, states.RESUMING)
def test_bad_transition_raises(self):
self.assertTransitionForbidden(states.FAILURE, states.SUCCESS)
class CheckTaskTransitionTest(TransitionTest):
def setUp(self):
super(CheckTaskTransitionTest, self).setUp()
self.check_transition = states.check_task_transition
self.transition_exc_regexp = '^Task transition.*not allowed'
def test_from_pending_state(self):
self.assertTransitions(from_state=states.PENDING,
allowed=(states.RUNNING,),
ignored=(states.PENDING, states.REVERTING,
states.SUCCESS, states.FAILURE,
states.REVERTED))
def test_from_running_state(self):
self.assertTransitions(from_state=states.RUNNING,
allowed=(states.SUCCESS, states.FAILURE,),
ignored=(states.REVERTING, states.RUNNING,
states.PENDING, states.REVERTED))
def test_from_success_state(self):
self.assertTransitions(from_state=states.SUCCESS,
allowed=(states.REVERTING,),
ignored=(states.RUNNING, states.SUCCESS,
states.PENDING, states.FAILURE,
states.REVERTED))
def test_from_failure_state(self):
self.assertTransitions(from_state=states.FAILURE,
allowed=(states.REVERTING,),
ignored=(states.FAILURE, states.RUNNING,
states.PENDING,
states.SUCCESS, states.REVERTED))
def test_from_reverting_state(self):
self.assertTransitions(from_state=states.REVERTING,
allowed=(states.REVERT_FAILURE,
states.REVERTED),
ignored=(states.RUNNING, states.REVERTING,
states.PENDING, states.SUCCESS))
def test_from_reverted_state(self):
self.assertTransitions(from_state=states.REVERTED,
allowed=(states.PENDING,),
ignored=(states.REVERTING, states.REVERTED,
states.RUNNING,
states.SUCCESS, states.FAILURE))
class CheckRetryTransitionTest(CheckTaskTransitionTest):
def setUp(self):
super(CheckRetryTransitionTest, self).setUp()
self.check_transition = states.check_retry_transition
self.transition_exc_regexp = '^Retry transition.*not allowed'
def test_from_success_state(self):
self.assertTransitions(from_state=states.SUCCESS,
allowed=(states.REVERTING, states.RETRYING),
ignored=(states.RUNNING, states.SUCCESS,
states.PENDING, states.FAILURE,
states.REVERTED))
def test_from_retrying_state(self):
self.assertTransitions(from_state=states.RETRYING,
allowed=(states.RUNNING,),
ignored=(states.RETRYING, states.SUCCESS,
states.PENDING, states.FAILURE,
states.REVERTED))
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