The mock of FactoryTraffic may look like the following:
public class FactoryTraffic { public static List<TrafficUnit> generateTraffic(int trafficUnitsNumber, Month month, DayOfWeek dayOfWeek, int hour, String country, String city, String trafficLight){ List<TrafficUnit> tms = new ArrayList(); for (int i = 0; i < trafficUnitsNumber; i++) { TrafficUnit trafficUnit = FactoryTraffic.getOneUnit(month, dayOfWeek, hour, country, city, trafficLight); tms.add(trafficUnit); } return tms; }}
It assembles a collection of TrafficUnit objects. In a real system, these objects would be created from the rows of the result of some database query, for example. But in our case, we just hardcode the values:
public static TrafficUnit getOneUnit ...
