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# Copyright (C) 2014 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 ironic.common import exception as excp
from ironic.common import fsm
from ironic.tests import base
class FSMTest(base.TestCase):
def setUp(self):
super(FSMTest, self).setUp()
m = fsm.FSM()
m.add_state('working', stable=True)
m.add_state('daydream')
m.add_state('wakeup', target='working')
m.add_state('play', stable=True)
m.add_transition('wakeup', 'working', 'walk')
self.fsm = m
def test_is_stable(self):
self.assertTrue(self.fsm.is_stable('working'))
def test_is_stable_not(self):
self.assertFalse(self.fsm.is_stable('daydream'))
def test_is_stable_invalid_state(self):
self.assertRaises(excp.InvalidState, self.fsm.is_stable, 'foo')
def test_target_state_stable(self):
# Test to verify that adding a new state with a 'target' state pointing
# to a 'stable' state does not raise an exception
self.fsm.add_state('foo', target='working')
self.fsm.default_start_state = 'working'
self.fsm.initialize()
def test__validate_target_state(self):
# valid
self.fsm._validate_target_state('working')
# target doesn't exist
self.assertRaisesRegex(excp.InvalidState, "does not exist",
self.fsm._validate_target_state, 'new state')
# target isn't a stable state
self.assertRaisesRegex(excp.InvalidState, "stable",
self.fsm._validate_target_state, 'daydream')
def test_initialize(self):
# no start state
self.assertRaises(excp.InvalidState, self.fsm.initialize)
# no target state
self.fsm.initialize('working')
self.assertEqual('working', self.fsm.current_state)
self.assertIsNone(self.fsm.target_state)
# default target state
self.fsm.initialize('wakeup')
self.assertEqual('wakeup', self.fsm.current_state)
self.assertEqual('working', self.fsm.target_state)
# specify (it overrides default) target state
self.fsm.initialize('wakeup', 'play')
self.assertEqual('wakeup', self.fsm.current_state)
self.assertEqual('play', self.fsm.target_state)
# specify an invalid target state
self.assertRaises(excp.InvalidState, self.fsm.initialize,
'wakeup', 'daydream')
def test_process_event(self):
# default target state
self.fsm.initialize('wakeup')
self.fsm.process_event('walk')
self.assertEqual('working', self.fsm.current_state)
self.assertIsNone(self.fsm.target_state)
# specify (it overrides default) target state
self.fsm.initialize('wakeup')
self.fsm.process_event('walk', 'play')
self.assertEqual('working', self.fsm.current_state)
self.assertEqual('play', self.fsm.target_state)
# specify an invalid target state
self.fsm.initialize('wakeup')
self.assertRaises(excp.InvalidState, self.fsm.process_event,
'walk', 'daydream')
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