Spock模拟专用变量

Question

public class Car {
    private Engine engine;

    public void drive(){
        System.out.println("test");
        if (engine.isState()) {
            // Do something
        } else {
           // Do something
        }
    }
}

@Mock
private Engine engine;

@InjectMocks
private Car car = new Car();

@Test
public void drive() {
    when(engine.isState()).thenReturn(true);
    car.drive();
}

Answer 1

这与其说是斯波克问题，不如说是一个时髦的问题。在Groovy中，您只需调用一个构造函数，命名私有成员，然后注入它。但这是丑陋的，您应该通过依赖注入重构可测试性，正如Tim Yates已经说过的。但不管它有什么价值，以下是你可以（但不应该）做的方法：

package de.scrum_master.stackoverflow;

public class Engine {
  private boolean state;

  public boolean isState() {
    return state;
  }
}

java prettyprint-override">package de.scrum_master.stackoverflow;

public class Car {
  private Engine engine;

  public void drive(){
    System.out.println("driving");
    if(engine.isState()) {
      System.out.println("true state");
    } else {
      System.out.println("false state");
    }
  }
}

package de.scrum_master.stackoverflow

import spock.lang.Specification

class CarTest extends Specification {
  def "Default engine state"() {
    given:
    def engine = Mock(Engine)
    def car = new Car(engine: engine)

    when:
    car.drive()

    then:
    true
  }

  def "Changed engine state"() {
    given:
    def engine = Mock(Engine) {
      isState() >> true
    }
    def car = new Car(engine: engine)

    when:
    car.drive()

    then:
    true
  }
}

顺便说一句，then:true是因为您的方法返回void，我不知道您还想检查哪些内容。

测试为绿色，控制台日志如下所示：

driving
false state
driving
true state