powermock mocking构造函数通过whennew（）不能与匿名类一起使用

问题描述

我有一个DummyResource类和一个DummyTarget文件，以及一个测试类TestDummyResource，如下所示，但模拟对象 DummyResource dr = mock（DummyResource.class）仅适用于我在普通类中调用构造函数，当它在匿名类中调用时，它调用实际的构造函数而不是使用模拟对象。

I have a DummyResource class and a DummyTarget file, and a test class TestDummyResource as below, but the mocked object DummyResource dr = mock(DummyResource.class) only works when I call the constructor inside a normal class, when it's called in an anonymous class, it's calling the actual constructor instead of using the mocked object.

版本：

powermock 1.4.12 mockito 1.9.0 junit 4.8.2

powermock 1.4.12 mockito 1.9.0 junit 4.8.2

DummyTarget。 java：

import java.io.IOException;
import java.io.OutputStream;

import javax.ws.rs.WebApplicationException;
import javax.ws.rs.core.StreamingOutput;


public class DummyTarget {
    public StreamingOutput testMocking() {
        return new StreamingOutput() {
            @Override
            public void write(OutputStream arg0) throws IOException, WebApplicationException {
                new DummyResource();
            }
        };
    }
}

DummyResource.java：

package com.smin.dummy;

public class DummyResource {
    public DummyResource() {
        System.out.println("mock failure");
    }
}

TestDummyResource.java：

package com.smin.dummy;

import static org.mockito.Mockito.mock;

import java.io.IOException;

import javax.ws.rs.WebApplicationException;
import javax.ws.rs.core.StreamingOutput;

import org.junit.Before;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.powermock.api.mockito.PowerMockito;
import org.powermock.core.classloader.annotations.PrepareForTest;
import org.powermock.modules.junit4.PowerMockRunner;

@RunWith(PowerMockRunner.class)
@PrepareForTest({DummyResource.class,DummyTarget.class})
public class TestDummyResource  {

    @Before
    public void setUp() throws Exception {
        DummyResource dr = mock(DummyResource.class);
        PowerMockito.whenNew(DummyResource.class).withNoArguments().thenReturn(dr);
    }

    @Test
    public void testMocked() throws WebApplicationException, IOException {
        new DummyResource(); // it uses the mocked object dr here, 
                             //doesn't print "mock failure"
        StreamingOutput sop = new DummyTarget().testMocking();
        sop.write(null);     // it calls DummyResource's constructor,
                             // prints ""mock failure"" here
    }
}

推荐答案

看起来匿名类可以继承定义它的类的包。你能试试？：

It looks like an anonymous class may inherit the package of the class that defines it. Can you try the wildcard form of PrepareForTest?:

@PrepareForTest("com.smin.dummy.*")

如果这不起作用，你可以尝试霰弹枪注释。

If that doesn't work, you could try the shotgun PrepareEverythingForTest Annotation.

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