为什么 PowerMockito 不能正确地模拟这个类？

Question

我正在使用PowerMockito，这是我的测试：

import com.PowerMockitoProduction;
import org.apache.commons.httpclient.HttpClient;
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(HttpClient.class)
public class PowerMockitoTest {

    @Test(expected = UnsupportedOperationException.class)
    public void test() throws Exception {

        PowerMockito.whenNew(HttpClient.class).withNoArguments().thenThrow(new UnsupportedOperationException());

        new PowerMockitoProduction().createClient();

    }
}

此测试失败。

java.lang.AssertionError: Expected exception: java.lang.UnsupportedOperationException

PowerMockitoProduction 的作用如下：

package com;

import org.apache.commons.httpclient.HttpClient;

public class PowerMockitoProduction {

    public void createClient() {
        HttpClient client = new HttpClient();
        System.out.println(client);
    }

}

我希望这段代码根据我的测试中的这一行创建一个模拟 HttpClient：

PowerMockito.whenNew(HttpClient.class).withNoArguments().thenThrow(new UnsupportedOperationException());

但它似乎并没有影响我的生产代码。我做错了什么？

Answer 1

我发现我做错了什么。我需要改变：

@PrepareForTest(HttpClient.class)

到

@PrepareForTest(PowerMockitoProduction.class)