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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
class FysomInitializationTests(unittest.TestCase):
def test_should_have_no_state_when_no_initial_state_is_given(self):
fsm = Fysom({
'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'}
]
})
self.assertEqual(fsm.current, 'none')
def test_initial_state_should_be_green_when_configured(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'}
]
})
self.assertEqual(fsm.current, 'green')
def test_initial_state_should_work_with_different_event_name(self):
fsm = Fysom({
'initial': {'state': 'green', 'event': 'init'},
'events': [
{'name': 'panic', 'src': 'green', 'dst': 'red'},
{'name': 'calm', 'src': 'red', 'dst': 'green'},
]
})
self.assertEquals(fsm.current, 'green')
def test_deferred_initial_state_should_be_none_then_state(self):
fsm = Fysom({
'initial': {'state': 'green', 'event': 'init', 'defer': True},
'events': [
{'name': 'panic', 'src': 'green', 'dst': 'red'},
{'name': 'calm', 'src': 'red', 'dst': 'green'},
]
})
self.assertEqual(fsm.current, 'none')
fsm.init()
self.assertEqual(fsm.current, 'green')
def test_tuples_as_trasition_spec(self):
fsm = Fysom({
'initial': 'green',
'events': [ # freely mix dicts and tuples
{'name': 'warn', 'src': 'green', 'dst': 'yellow'},
('panic', 'yellow', 'red'),
('calm', 'red', 'yellow'),
{'name': 'clear', 'src': 'yellow', 'dst': 'green'}
]
})
fsm.warn()
fsm.panic()
self.assertEqual(fsm.current, 'red')
fsm.calm()
fsm.clear()
self.assertEqual(fsm.current, 'green')
def test_kwargs_override_cfg(self):
fsm = Fysom({
'initial': 'green',
'events': [
{'name': 'panic', 'src': 'green', 'dst': 'red'},
{'name': 'calm', 'src': 'red', 'dst': 'green'},
]},
# override initial state and calm event
initial='red', events=[('calm', 'red', 'black')])
self.assertEqual(fsm.current, "red")
fsm.calm()
self.assertEqual(fsm.current, "black")
def test_init_kwargs_only(self):
fsm = Fysom(initial='green',
events=[('panic', 'green', 'red'),
('calm', 'red', 'green')])
self.assertEqual(fsm.current, "green")
fsm.panic()
self.assertEqual(fsm.current, "red")
fsm.calm()
self.assertEqual(fsm.current, "green")
def test_final_kwarg(self):
fsm = Fysom(initial='eternity', final='eternity')
self.assertEqual(fsm.current, 'eternity')
self.assertEqual(fsm.is_finished(), True)
def test_callbacks_kwarg(self):
history = []
def ontic(e):
history.append('tic')
def ontoc(e):
history.append('toc')
fsm = Fysom(initial='left',
events=[('tic', 'left', 'right'),
('toc', 'right', 'left')],
callbacks={'ontic': ontic,
'ontoc': ontoc})
fsm.tic()
fsm.toc()
fsm.tic()
fsm.toc()
self.assertEqual(history, ['tic', 'toc', 'tic', 'toc'])
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