assertEquals(0, persistenceService.getAllEmergencies().size());
persistenceService.storeEmergency(emergency);
assertEquals(1, persistenceService.getAllEmergencies().size());
trackingService.attachEmergency(call.getId(), emergency.getId());
persistenceService.storeHospital(new Hospital("My Hospital", 12, 1));
assertEquals(0, persistenceService.getAllVehicles().size());
ambulance1 = new Ambulance("My Ambulance Number 1");
persistenceService.storeVehicle(ambulance1);
ambulance2 = new Ambulance("My Ambulance Number 2");
persistenceService.storeVehicle(ambulance2);