模拟决赛课：powermock easymock testng

我是PowerMock的新手,找不到符合我情况的例子.

这并不复杂 – 我正在尝试使用PowerMock EasyMock来模拟TestNG测试中的最终类.

这是最后一堂课：

public final class MyFinalClass {
    private String myString = "someString";

    public final String getMyString() {
        return myString;
    }
}

被测试的类委托给最终类的实例：

public class MyActiveClass {
    private MyFinalClass finalClass;

    public String getFinalString() {
        return finalClass.getMyString();
    }

    public void setFinalClass(MyFinalClass finalClass) {
        this.finalClass = finalClass;
    }
}

这是测试类：

import static org.easymock.EasyMock.expect;
import org.powermock.api.easymock.PowerMock;
import org.powermock.core.classloader.annotations.PrepareForTest;
import org.powermock.modules.testng.PowerMockTestCase;
import org.testng.Assert;
import org.testng.annotations.Test;


@PrepareForTest({ MyFinalClass.class })
public class MyTestClass extends PowerMockTestCase {

    private MyActiveClass activeClass = new MyActiveClass();
    private MyFinalClass mockFinalClass;

    @Test
    public void getFinalString() {
        String expectedString = "mockedReturnString";
        mockFinalClass = PowerMock.createMock(MyFinalClass.class);
        activeClass.setFinalClass(mockFinalClass);
        expect(mockFinalClass.getMyString()).andReturn(expectedString);
        PowerMock.replayAll();
        Assert.assertEquals(activeClass.getFinalString(), expectedString);
        PowerMock.verifyAll();
    }
}

但是当我运行测试时,我得到一个非法的参数异常,抱怨MyFinalClass不是一个接口：

FAILED: getFinalString
java.lang.IllegalArgumentException: MyFinalClass is not an interface
    at java.lang.reflect.Proxy.getProxyClass(Unknown Source)
    at java.lang.reflect.Proxy.newProxyInstance(Unknown Source)
    at org.easymock.internal.JavaProxyFactory.createProxy(JavaProxyFactory.java:24)
    at org.easymock.internal.MocksControl.createMock(MocksControl.java:51)
    at org.powermock.api.easymock.PowerMock.doCreateMock(PowerMock.java:2212)
    at org.powermock.api.easymock.PowerMock.doMock(PowerMock.java:2163)
    at org.powermock.api.easymock.PowerMock.createMock(PowerMock.java:89)
    at MyTestClass.getFinalString(MyTestClass.java:22)
         ...

我错过了什么？在此先感谢您的帮助！！！

以下是一些选项：

>为MyFinalClass引入一个新接口,然后模拟该接口.>如果您没有编辑MyFinalClass的权限,则可以使用包装器对象,该对象委托给MyFinalClass并模拟测试中的包装器对象.>我不知道“powermock easymock testng”是否可以直接模拟最后一堂课,但在我看来,可以通过反思改变最终属性.所以也许有更好的解决方案.