@Test
void add_vehicle_should_add_vehicle() {

    VehicleRoutingSolution solution = SolutionFactory.emptySolution();
    when(scoreDirector.getWorkingSolution()).thenReturn(solution);
    PlanningVehicle vehicle = PlanningVehicleFactory.testVehicle(1);
    AddVehicle addVehicle = new AddVehicle(vehicle);
    addVehicle.doChange(scoreDirector);
    assertThat(solution.getVehicleList()).containsExactly(vehicle);
    verify(scoreDirector).beforeProblemFactAdded(vehicle);
    verify(scoreDirector).afterProblemFactAdded(vehicle);
    verify(scoreDirector).triggerVariableListeners();
}