def test_getting_non_existing_signal_group(self):
""" Test retrieving signal group by id when this id does not exist """
# GIVEN
signalgroup1 = SignalGroup(id="sg1", traffic_lights=[TrafficLight(capacity=1800, lost_time=1)],
min_greenyellow=10, max_greenyellow=80, min_red=10, max_red=80)
signalgroup2 = SignalGroup(id="sg2", traffic_lights=[TrafficLight(capacity=1800, lost_time=1)],
min_greenyellow=10, max_greenyellow=80, min_red=10, max_red=80)
intersection = Intersection(signalgroups=[signalgroup1, signalgroup2], conflicts=[], sync_starts=[],
offsets=[], greenyellow_leads=[])
with self.assertRaises(ValueError):
# WHEN
intersection.get_signalgroup(signalgroup_id="sg3")
def test_getting_signal_group(self):
""" Test retrieving signal group by id """
# GIVEN
signalgroup1 = SignalGroup(id="sg1", traffic_lights=[TrafficLight(capacity=1800, lost_time=1)],
min_greenyellow=10, max_greenyellow=80, min_red=10, max_red=80)
signalgroup2 = SignalGroup(id="sg2", traffic_lights=[TrafficLight(capacity=1800, lost_time=1)],
min_greenyellow=10, max_greenyellow=80, min_red=10, max_red=80)
intersection = Intersection(signalgroups=[signalgroup1, signalgroup2], conflicts=[], sync_starts=[],
offsets=[], greenyellow_leads=[])
# WHEN/THEN
self.assertEqual(intersection.get_signalgroup(signalgroup_id="sg1"), signalgroup1)
self.assertEqual(intersection.get_signalgroup(signalgroup_id="sg2"), signalgroup2)
def validate_fixed_order(intersection: Intersection, fts: FixedTimeSchedule,
periodic_order: PeriodicOrder) -> None:
""" Validate that the the signalgroups indeed receive their greenyellow intervals
in the requested periodic order (for only the periodic order that is given as argument).
:return: -
:raises SafetyException: if the requested order is not satisfied"""
first_signalgroup = intersection.get_signalgroup(
signalgroup_id=periodic_order.order[0])
first_interval_start = fts.get_greenyellow_interval(first_signalgroup,
k=0).start_greenyellow
prev_switch = 0
for signalgroup in periodic_order.order:
for interval in fts.get_greenyellow_intervals(signalgroup):
# shift schedule such that first greenyellow interval of the first signalgroup in the order starts at time=0
switch = (interval.start_greenyellow - first_interval_start +
EPSILON) % fts.period - EPSILON
if switch < prev_switch:
raise SafetyViolation(
f"Periodic order {periodic_order.to_json()} is violated")
prev_switch = switch