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# coding=utf-8
#
# fysom - pYthOn Finite State Machine - this is a port of Jake
# Gordon's javascript-state-machine to python
# https://github.com/jakesgordon/javascript-state-machine
#
# Copyright (C) 2011 Mansour Behabadi <mansour@oxplot.com>, Jake Gordon
# and other contributors
#
# Permission is hereby granted, free of charge, to any person obtaining
# a copy of this software and associated documentation files (the
# "Software"), to deal in the Software without restriction, including
# without limitation the rights to use, copy, modify, merge, publish,
# distribute, sublicense, and/or sell copies of the Software, and to
# permit persons to whom the Software is furnished to do so, subject to
# the following conditions:
#
# The above copyright notice and this permission notice shall be
# included in all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
# IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
# CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
# TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
# SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
#
import unittest
from fysom import Fysom, FysomError
class FysomStateTests(unittest.TestCase):
def setUp(self):
self.fsm = Fysom({
'initial': 'green',
'events': [
{'name': 'warn', 'src': 'green', 'dst': 'yellow'},
{'name': 'panic', 'src': 'yellow', 'dst': 'red'},
{'name': 'calm', 'src': 'red', 'dst': 'yellow'},
{'name': 'clear', 'src': 'yellow', 'dst': 'green'},
{'name': 'warm', 'src': 'green', 'dst': 'blue'}
]
})
def test_is_state_should_succeed_for_initial_state(self):
self.assertTrue(self.fsm.isstate('green'))
def test_identity_transition_should_not_be_allowed_by_default(self):
self.assertFalse(self.fsm.can('clear'))
self.assertTrue(self.fsm.cannot('clear'))
def test_configured_transition_should_work(self):
self.assertTrue(self.fsm.can('warn'))
def test_transition_should_change_state(self):
self.fsm.warn()
self.assertTrue(self.fsm.isstate('yellow'))
def test_should_raise_exception_when_state_transition_is_not_allowed(self):
self.assertRaises(FysomError, self.fsm.panic)
self.assertRaises(FysomError, self.fsm.calm)
self.assertRaises(FysomError, self.fsm.clear)
def test_event_handler_has_name_and_docstring(self):
self.assertEqual(self.fsm.warm.__name__, "warm", "Event handlers do not have appropriate name.")
self.assertNotEqual(self.fsm.warm.__name__, None, "Docstring for event handler is None!")
def test_trigger_should_trigger_the_event_handler(self):
self.assertEqual(self.fsm.current, "green", "The initial state isn't the expected state.")
self.fsm.trigger("warm")
make_callable = lambda: self.fsm.trigger("unknowevent")
self.assertRaises(FysomError, make_callable)
self.assertEqual(self.fsm.current, "blue", "The initial state isn't the expected state.")
def test_trigger_should_trigger_the_event_handler_with_args(self):
self.assertEqual(self.fsm.current, "green", "The initial state isn't the expected state.")
def onblue(event):
self.assertEqual(event.args, ("any-positional-argument",))
self.fsm.onblue = onblue
self.fsm.trigger("warm", "any-positional-argument")
self.assertEqual(self.fsm.current, "blue", "The initial state isn't the expected state.")
def test_trigger_should_trigger_the_event_handler_with_kwargs(self):
self.assertEqual(self.fsm.current, "green", "The initial state isn't the expected state.")
def onblue(event):
self.assertEqual(event.keyword_argument, "any-value")
self.fsm.onblue = onblue
self.fsm.trigger("warm", keyword_argument="any-value")
self.assertEqual(self.fsm.current, "blue", "The initial state isn't the expected state.")
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