Mockito Spy doReturn调用原始方法

Question

import static org.junit.Assert.assertTrue;
import static org.mockito.Matchers.any;
import static org.mockito.Mockito.spy;

import org.junit.Before;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.mockito.Mockito;
import org.mockito.runners.MockitoJUnitRunner;

class MyClass {
    public int method1(){
        int x =10;
        x = method2(2);
        return x;
    }

    public int method2(int y){
        method3();
        return 20;
    }

    public int method3(){
       return 30;
    }
}

@RunWith(MockitoJUnitRunner.class)
public class Method1Test {
    private MyClass myClass = new MyClass();

    @Before
    public void setup(){}

    @Test
    public void test01(){
        MyClass spyMyClass = spy(myClass);
        doReturn(28).when(spyMyClass).method2(any());
        int a = spyMyClass.method1();
        assertTrue("We did it!!!",a==20);
    }
}

org.mockito.exceptions.misusing.InvalidUseOfMatchersException: 
Misplaced argument matcher detected here:

-> at com.Method1Test.test01(Method1Test.java:45)

请有人帮助我在上面，也提供我的解决上述问题。

Answer 1

该问题是由传递给method2的参数的类型不匹配引起的。这就是异常消息的这一部分告诉您的：

org.mockito.exceptions.misusing.invaliduseofmatchersexception：在此处检测到错误的参数匹配器：

通过以下测试：

@Test
public void test01(){
    MyClass spyMyClass = spy(myClass);
    doReturn(28).when(spyMyClass).method2(anyInt());
    int a = spyMyClass.method1();
    assertTrue("We did it!!!",a==28);
}

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