模拟课程中的模拟课程

Question

我该如何与正在测试的班级中的Mockito其他班级进行模拟？

例如：

MyClass.java

class MyClass {
    public boolean performAnything() {
        AnythingPerformerClass clazz = new AnythingPerformerClass();
        return clazz.doSomething();        
    }
}

任何东西PerformerClass.java

class AnythingPerformerClass {
    public boolean doSomething() {
        //very very complex logic
        return result;
    }
}

并测试：

@Test
public void testPerformAnything() throws Exception {
    MyClass clazz = new MyClass();
    Assert.assertTrue(clazz.performAnything());
}

我AnythingPerformerClass是否可以欺骗以排除不必要的逻辑AnythingPerformerClass？我可以重写doSomething()方法来简单地返回true还是false？

为什么指定Mockito，因为在Robolectric进行Android测试时需要它。

Answer 1

您可以重构，MyClass以便它使用依赖注入。不用让它创建AnythingPerformerClass实例，您可以将类的实例传递给MyClass类似这样的构造函数：

class MyClass {

   private final AnythingPerformerClass clazz;

   MyClass(AnythingPerformerClass clazz) {
      this.clazz = clazz;
   }

   public boolean performAnything() {         
     return clazz.doSomething();        
   }
}

然后，您可以在单元测试中传递模拟实现

@Test
public void testPerformAnything() throws Exception {
   AnythingPerformerClass mockedPerformer = Mockito.mock(AnythingPerformerClass.class);
   MyClass clazz = new MyClass(mockedPerformer);
   ...
}

或者，如果您的AnythingPerformerClass包含状态，则可以将a传递AnythingPerformerClassBuilder给构造函数。