Java自定义Exception错误未报告异常

Question

您好，我在对异常引发函数运行 junit 测试时遇到一些问题，

我有一个定制的异常(exception):

package rental;
public class UnknownVehicleException extends Exception{
    public UnknownVehicleException(){
      System.out.println("Vehicule not found in agency");
    }
}

以下是 RentalAgency 类的基础:

public class RentalAgency {
    // vehicles of this agency
    private List<Vehicle> theVehicles;

    // maps client and rented vehicle (at most one vehicle by client)
    private Map<Client,Vehicle> rentedVehicles;

    public RentalAgency(List<Vehicle> theVehicles, Map<Client,Vehicle> rentedVehicles) {
      this.theVehicles = theVehicles;
      this.rentedVehicles = rentedVehicles;
    }

这个函数应该在某些情况下抛出这个异常:

/** client rents a vehicle
    * @param client the renter
    * @param v the rented vehicle
    * @return the daily rental price
    * @exception UnknownVehicleException   if v is not a vehicle of this agency
    * @exception IllegalStateException if v is already rented or client rents already another vehicle
    */
    public float rentVehicle(Client client, Vehicle v) throws UnknownVehicleException, IllegalStateException {
      if(! this.theVehicles.contains(v)){
        throw new UnknownVehicleException();
      }
      if(this.hasRentedAVehicle(client) || this.isRented(v)){
        throw new IllegalStateException("Client is already renting a vehicle or the vehicle is already being rented");
      }
      else{
        this.rentedVehicles.put(client, v);
        return v.getDailyPrice();
      }
    }

现在有了所有这些，我正在尝试运行此测试:

@Test (expected = UnknownVehicleException.class)
public void testRentVehicleIfVehicleNotInAgency(){
  this.renault.rentVehicle(this.client1, this.clio);
}

这给了我

unreported exception UnknownVehicleException; must be caught or declared to be thrown

我不知道我哪里搞砸了

感谢任何帮助，并随时询问有关我的代码的更多详细信息

Answer 1

您的测试方法不会引发或捕获异常。您期望出现异常，但实际上并未抛出异常。

@Test (expected = UnknownVehicleException.class)
public void testRentVehicleIfVehicleNotInAgency() throws UnknownVehicleException {
    this.renault.rentVehicle(this.client1, this.clio);
}