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Diffstat (limited to 'distbuild/sm_tests.py')
-rw-r--r-- | distbuild/sm_tests.py | 98 |
1 files changed, 98 insertions, 0 deletions
diff --git a/distbuild/sm_tests.py b/distbuild/sm_tests.py new file mode 100644 index 00000000..59b9c023 --- /dev/null +++ b/distbuild/sm_tests.py @@ -0,0 +1,98 @@ +# distbuild/sm_tests.py -- unit tests for state machine abstraction +# +# Copyright (C) 2012, 2014 Codethink Limited +# +# This program is free software; you can redistribute it and/or modify +# it under the terms of the GNU General Public License as published by +# the Free Software Foundation; version 2 of the License. +# +# This program is distributed in the hope that it will be useful, +# but WITHOUT ANY WARRANTY; without even the implied warranty of +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +# GNU General Public License for more details. +# +# You should have received a copy of the GNU General Public License along +# with this program; if not, write to the Free Software Foundation, Inc., +# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.. + + +import unittest + +import distbuild + + +class DummyEventSource(object): + + pass + + +class DummyEvent(object): + + pass + + +class StateMachineTests(unittest.TestCase): + + def setUp(self): + self.sm = distbuild.StateMachine('init') + self.sm.distbuild = None + self.sm.setup() + self.event_source = DummyEventSource() + self.event = DummyEvent() + self.event_sources = [] + self.events = [] + self.callback_result = None + + def callback(self, event_source, event): + self.event_sources.append(event_source) + self.events.append(event) + return self.callback_result + + def test_ignores_event_when_there_are_no_transitions(self): + new_events = self.sm.handle_event(self.event_source, self.event) + self.assertEqual(new_events, []) + self.assertEqual(self.event_sources, []) + self.assertEqual(self.events, []) + + def test_ignores_event_when_no_transition_matches(self): + spec = [ + ('init', self.event_source, str, 'init', self.callback), + ] + self.sm.add_transitions(spec) + new_events = self.sm.handle_event(self.event_source, self.event) + self.assertEqual(new_events, []) + self.assertEqual(self.event_sources, []) + self.assertEqual(self.events, []) + + def test_handles_lack_of_callback_ok(self): + spec = [ + ('init', self.event_source, DummyEvent, 'init', None), + ] + self.sm.add_transitions(spec) + new_events = self.sm.handle_event(self.event_source, self.event) + self.assertEqual(new_events, []) + self.assertEqual(self.event_sources, []) + self.assertEqual(self.events, []) + + def test_calls_registered_callback_for_right_event(self): + spec = [ + ('init', self.event_source, DummyEvent, 'init', self.callback), + ] + self.sm.add_transitions(spec) + new_events = self.sm.handle_event(self.event_source, self.event) + self.assertEqual(new_events, []) + self.assertEqual(self.event_sources, [self.event_source]) + self.assertEqual(self.events, [self.event]) + + def test_handle_converts_nonlist_to_list(self): + self.callback_result = ('foo', 'bar') + + spec = [ + ('init', self.event_source, DummyEvent, 'init', self.callback), + ] + self.sm.add_transitions(spec) + new_events = self.sm.handle_event(self.event_source, self.event) + self.assertEqual(new_events, ['foo', 'bar']) + self.assertEqual(self.event_sources, [self.event_source]) + self.assertEqual(self.events, [self.event]) + |