如何使用 PowerMock 调用私有方法并获取 return 值？

Question

我使用 PowerMockito 模拟一个包含私有方法的 class 实例。我想验证私有方法 return 值是否正确，那么如何使用 PowerMock 调用私有方法并获取 return 值？这是演示：

     class Demo {

        public publicMethod1ReturnClass publicMethod1() {
            // do something...
        }

        private privateMethod1ReturnClass privateMethod1() {
            // do something
        }

    }

    @RunWith(PowerMockRunner.class)
    @PrepareForTest(Demo.class)
    class DemoTest {

        @Test
        public void test() throws Exception {
            Demo demo = PowerMockito.spy(new Demo());

            privateMethod1ReturnClass result = demo.privateMethod1();
        }

    }

Answer 1

你可以像这样使用 Whitebox，

privateMethod1ReturnClass s = Whitebox.invokeMethod(demo, "privateMethod1");
assertEquals(s, "yourExpectedResult");

如何使用 PowerMock 调用私有方法并获取 return 值？

How to use PowerMock invoke private method and get return value?

mockito

powermockito