def test_duration_secs_end_none(self, mock_time):
scenario = Scenario()
scenario._end_time_secs = None
scenario._start_time_secs = 12345
mock_time.time.return_value = 12346
self.assertEqual(1, scenario.duration_secs())
def test_duration_secs_start_none(self):
scenario = Scenario()
scenario._start_time_secs = None
scenario._end_time_secs = 12345
with self.assertRaises(RuntimeError):
scenario.duration_secs()
def test_duration_secs_neither_none(self):
scenario = Scenario()
scenario._start_time_secs = 12345
scenario._end_time_secs = 12346
self.assertEqual(1, scenario.duration_secs())
def test_duration_secs_both_none(self):
scenario = Scenario()
scenario._start_time_secs = None
scenario._end_time_secs = None
self.assertIsNone(scenario.duration_secs())