def test_add_partial_timeline__contradiction(self):
"""Verify that order contradiction is detected and avoided.
"""
partial_timelines = [
['one', 'two', 'three'],
['three', 'two']]
timeline = Timeline()
timeline.add_partial_timeline(partial_timelines[0])
self.assertRaisesRegexp(
ValueError,
"Contradiction detected: event 'three' comes before and after event 'two'",
timeline.add_partial_timeline,
partial_timelines[1])
def test_add_partial_timeline__simple(self):
"""Verify side-effects of single call to add_partial_timeline.
"""
partial_timeline = ['one', 'two', 'three', 'four']
timeline = Timeline()
timeline.add_partial_timeline(partial_timeline)
# Verify internal timeline data
expected_subsequent_events = {'one': set(['two']),
'two': set(['three']),
'three': set(['four']),
'four': set()}
self.assertEqual(expected_subsequent_events, timeline._subsequent_events)
