如何模拟父类的受保护方法？

Question

我尝试模拟父类的受保护方法。因此，我使用Mockito&PowerMockito。我的家长班。

public class Parent {
    protected int foo() {
        throw new RuntimeException("Do not invoke this method.");
    }
}

public class Child extends Parent {
    protected int boo() {
        return super.foo();
    }
}

@RunWith(PowerMockRunner.class)
@PrepareForTest({Parent.class, Child.class})
public class ChildTest {

    @Mock
    private Child childMock;

    @Before
    public void before() {
        initMocks(childMock);
    }

    @Test
    public void shouldInvokeProtectedMockedMethod() throws Exception {
        /* Given */
        PowerMockito.doReturn(500).when(childMock, "foo");
        /* When */
        childMock.boo();
        /* Then */
        Mockito.verify(childMock, Mockito.times(1)).boo();
        Mockito.verify(childMock, Mockito.times(1)).foo();
    }

    @After
    public void after() {
        Mockito.reset(childMock);
    }
}

Wanted but not invoked:
child.foo();
-> at com.test.ChildTest.shouldInvokeProtectedMockedMethod(ChildTest.java:36)

However, there were other interactions with this mock:
child.boo();
-> at com.test.ChildTest.shouldInvokeProtectedMockedMethod(ChildTest.java:33)

Answer 1

如果您想检查foo（）方法是否被真正调用，那么您既不需要Mockito，也不需要PowerMockito。

捕捉运行时异常会通知您已经调用了foo（）方法。

package foo.bar;

import org.junit.Test;

public class ChildTest {

    /**
     * child.boo() calls super.foo(), then throws a RuntimeException.
     */
    @Test(expected = RuntimeException.class)
    public void shouldInvokeProtectedMethod() {
        Child child = new Child();
        child.boo();
    }
}