使用 PowerMockito 模拟私有 void 方法

Question

public class Abcd {
    
    public String one() {
        System.out.println("Inside method one");
        StringBuilder sb = new StringBuilder();
        two(sb);
        return "Done";
    }
    
    private void two(StringBuilder sb) {
        System.out.println("Inside method two");
    }
}

这里是测试class

@RunWith(PowerMockRunner.class)
@PrepareForTest(Abcd.class)
public class TestAbcd {
    
    @Test
    public void testMethod1() throws Exception {
        Abcd abcd = PowerMockito.spy(new Abcd());
        StringBuilder sb = new StringBuilder();
        PowerMockito.doNothing().when(abcd, "two", sb);
        abcd.one();
    }
}

控制台输出：

Inside method one
Inside method two

编辑部分无故障痕迹：故障痕迹：

请让我知道我犯了什么错误，我该如何解决。

Answer 1

您需要@PrepareForTest 注释才能使用 PowerMockito 获得对私有方法的这种控制。

查看这篇文章：

总而言之，测试用例应该如下所示：

@RunWith(PowerMockRunner.class)
@PrepareForTest(Abcd.class)
public class TestAbcd {
    
    @Test
    public void testMethod1() throws Exception {
        Abcd abcd = PowerMockito.spy(new Abcd());
        PowerMockito.doNothing().when(abcd, method(Abcd.class, "two", StringBuilder.class))
                .withArguments(any(StringBuilder.class));               
        abcd.one();
    }
}

使用 PowerMockito 模拟私有 void 方法

Mock a private void method using PowerMockito

unit-testing

mockito

powermockito