在實現接口后本地測試全部通過，但代碼提交后出現異常

Question

问题遇到的现象和发生背景

一個接口

```java
public interface RemoteControlCar {
     void drive();
     int getDistanceTravelled();
}

并且有兩個類實現了這個接口，

```java
public class ExperimentalRemoteControlCar implements RemoteControlCar {
    private final int SPEED = 20;

    private int distanceTraveled=0;
    public void drive() {
        distanceTraveled += SPEED;
    }
    public int getDistanceTravelled() {
        return distanceTraveled;
    }
}

```java
class ProductionRemoteControlCar implements RemoteControlCar {
    private final int SPEED = 10;
    private int distanceTraveled;
    private int numberOfVictories;
    public void drive() {
        distanceTraveled += SPEED;
    }
    public int getDistanceTravelled() {
        return distanceTraveled;
    }
    public void setNumberOfVictories(int numberOfVictories) {
        this.numberOfVictories = numberOfVictories;
    }
    public int getNumberOfVictories() {
        return numberOfVictories;
    }
}

public class TestTrack {

    public static void race(RemoteControlCar car）
 {
     car.drive();
    }
    public static List<ProductionRemoteControlCar> getRankedCars(ProductionRemoteControlCar prc1,
                                                                 ProductionRemoteControlCar prc2
                                                                ) {
     List<ProductionRemoteControlCar>  prolist=new ArrayList<>();
          prolist.add(prc1);
          prolist.add(prc2);
         prolist.sort((a,b) ->  a.getNumberOfVictories()-b.getNumberOfVictories());
          return  prolist;
        }
}

測試類

import org.junit.jupiter.api.Test;
import java.util.List;
import static org.assertj.core.api.Assertions.assertThat;

public class RemoteControlCarTest {
    @Test
    public void race() {
        ProductionRemoteControlCar productionCar = new ProductionRemoteControlCar();
        ExperimentalRemoteControlCar experimentalCar = new ExperimentalRemoteControlCar();
        TestTrack.race((RemoteControlCar) productionCar);
        TestTrack.race((RemoteControlCar) productionCar);
        TestTrack.race((RemoteControlCar) experimentalCar);
        TestTrack.race((RemoteControlCar) experimentalCar);
        assertThat(experimentalCar.getDistanceTravelled() - productionCar.getDistanceTravelled()).isEqualTo(20);
    }

    @Test
    public void rankCars() {
        ProductionRemoteControlCar prc1 = new ProductionRemoteControlCar();
        ProductionRemoteControlCar prc2 = new ProductionRemoteControlCar();
        prc1.setNumberOfVictories(3);
        prc2.setNumberOfVictories(2);
        List<ProductionRemoteControlCar> rankings = TestTrack.getRankedCars(prc1, prc2);
        assertThat(rankings.get(1)).isEqualTo(prc1);
    }

    @Test
    public void ensureCarsAreComparables() {

        assertThat(RemoteControlCar.class).isAssignableFrom(ProductionRemoteControlCar.class);
    }
}

本地測試全部通過，

但是提交至exercism.org后報錯如下：

运行结果及报错内容

Answer 1

报错是类型转化异常，检查一下是不是漏提代码了？