Question

测试中的类是TestedClass，它包含一个名为＆＃34; inner＆＃34;的字段。来自类型InnerClass。

Class TestedClass{

  InnerClass inner;

  public void methodToTest() {
     inner.getSomething().AddSomething(new Something());
  }
}

在我的测试中，我为＆＃34;内部＆＃34;创建了一个模拟器。并且无法弄清楚如何测试methodToTest，我试过的所有选项要么不编译，要么从Mockito获得例外。模拟和测试这种情况的正确方法是什么？

感谢。

Answer 1

您应该在InnerClass初始化期间注入TestedClass模拟。例如，你应该有一个构造函数：

class Something {
    void addSomething(Something sth) {
    }
}

class InnerClass {
    Something getSomething() {
        return new Something();
    }
}

class TestClass {

    private final InnerClass inner;

    TestClass(InnerClass inner) {
        this.inner = inner;
    }

    public void methodToTest() {
        inner.getSomething().addSomething(new Something());
    }
}

验证通话的测试将是：

@Test
public void shouldInvokeInnerClassMethod() {
    InnerClass innerMock = Mockito.mock(InnerClass.class);
    TestClass testSubject = new TestClass(innerMock);

    testSubject.methodToTest();

    verify(innerMock).getSomething();
}

如果您想测试传递给addSometing方法的值：

@Test
public void shouldAddSomething() {
    ArgumentCaptor<Something> somethingCaptor = ArgumentCaptor.forClass(Something.class);
    Something somethingMock = Mockito.mock(Something.class);
    InnerClass innerMock = Mockito.mock(InnerClass.class);
    when(innerMock.getSomething()).thenReturn(somethingMock);
    TestClass testSubject = new TestClass(innerMock);

    testSubject.methodToTest();

    verify(somethingMock).addSomething(somethingCaptor.capture());
    Something addedSomething = somethingCaptor.getValue();
    //assertions on addedSomething content
}

嘲笑链式电话

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