Powermock不料在最后的无效方法抛出InvalidUseOfMatchersException

Question

我的工作进行单元测试我的Java应用程序..

我的目标是使用Powermock对BOProcessor类的实例创建一个间谍。 BOProcessor具有最终空隙方法;我将建立我的间谍抛出一个异常时，该方法被调用。我也将在这个相同的测试嘲讽MyDao，但嘲讽这个类是直接的。然后嘲笑MyDao将被传递到名为classUnderTest MyDaoService的一个实例。然后我会作出断言反对classUnderTest。

每当我试图建立上述情况下，Powermock（或的Mockito？）抛出InvalidUseOfMatchersException当我安装我的间谍doThrow。奇怪的是，当doThrow预期之后到classUnderTest调用这个异常仅抛出。如果我删除以后调用的classUnderTest，期望能正常工作。甚至怪异 - classUnderTest甚至不使用抛出错误的间谍！

这是我的测试代码上面列出的全部。为了突出这个问题，我已经删除了所有的代码没有直接关系。 （我甚至去掉这个测试的全部目的。）

package my.package;

import static org.mockito.Matchers.any;
import static org.mockito.Mockito.doThrow;
import static org.powermock.api.mockito.PowerMockito.mock;
import static org.powermock.api.mockito.PowerMockito.spy;

import org.junit.Test;

public class WhatAmIDoingWrong {

    @Test
    public void whatAmIDoingWrong() {

        MyDao mockedDao = mock(MyDao.class);
        BOProcessor processor = new BOProcessor();
        BOProcessor mockedProcessor = spy(processor);

        MyDaoService classUnderTest = new MyDaoService(mockedDao);

        doThrow(new Exception()).when(mockedProcessor).process(any(FakeBusinessObject.class));

        classUnderTest.interactWithDao();
    }
}

这里是个例外 - 这我试图解决 - 从我的测试代码doThrow行抛出（讽刺）。

org.mockito.exceptions.misusing.InvalidUseOfMatchersException: 
Invalid use of argument matchers!
0 matchers expected, 1 recorded:
-> at my.package.WhatAmIDoingWrong.whatAmIDoingWrong(WhatAmIDoingWrong.java:21)

This exception may occur if matchers are combined with raw values:
    //incorrect:
    someMethod(anyObject(), "raw String");
When using matchers, all arguments have to be provided by matchers.
For example:
    //correct:
    someMethod(anyObject(), eq("String by matcher"));

For more info see javadoc for Matchers class.

    at my.package.MyDaoService.interactWithDao(MyDaoService.java:33)
    at my.package.WhatAmIDoingWrong.whatAmIDoingWrong(WhatAmIDoingWrong.java:23)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
    at java.lang.reflect.Method.invoke(Unknown Source)
    at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:50)
    at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
    at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:47)
    at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
    at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:325)
    at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:78)
    at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:57)
    at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290)
    at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71)
    at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288)
    at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58)
    at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268)
    at org.junit.runners.ParentRunner.run(ParentRunner.java:363)
    at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:89)
    at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:41)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:541)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:763)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:463)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:209)

下面是我的测试中使用的类。要重申的是，名为classUnderTest的MyDaoService甚至不知道BOProcessor的间谍;它只能对MyDao的模拟。但在BOProcessor的期待值，如果classUnderTest被称为间谍只有失败。

public class BOProcessor {

    public final void process(FakeBusinessObject bar) {}
}

public class FakeBusinessObject {

}

import java.util.Collections;
import java.util.List;

public class MyDao {

    public MyDao() {}

    public List<String> getAllData(){
        return Collections.emptyList();
    }

}

public class MyDaoService {

    private MyDao applicationDao;

    public MyDaoService(MyDao applicationDao) {
        this.applicationDao = applicationDao;
    }

    public synchronized void interactWithDao() {
        applicationDao.getAllData();
    }
}

我全光照的JUnit 4.12，19年1月10日的Mockito和Powermock 1.7.4。该项目运行春季4.3.12RELEASE与包括弹簧试验。

为什么Powermock抛出此异常？我不能正确使用any匹配器？为什么地球上时，以后调用具有不同的模拟交互，这是唯一的例外抛出？

谢谢您的帮助！

Answer 1

事实证明，我是使用间谍错了。事情妨碍org.mockito.stubbing.Stubber.when(T mock)实现意味着我不能设置在间谍期待我想要的方式。但捕捉竟是我使用的情况下更适合呢。

最后，我的测试是这样的：

public class FixedNow{

    @Test
    public void fixedNow() {

        MyDao mockedDao = mock(MyDao.class);
        BOProcessor mockedProcessor = mock(BOProcessor.class);
        FakeBusinessObject problematicBO = new FakeBusinessObject();
        ArgumentCaptor<FakeBusinessObject> fakeBOCaptor = ArgumentCaptor.forClass(FakeBusinessObject.class);

        MyDaoService classUnderTest = new MyDaoService(mockedDao, mockedProcessor);

        doThrow(new Exception()).when(mockedProcessor).process(eq(problematicBO));
        doNothing().when(mockedProcessor).process(fakeBOCaptor.capture());

        classUnderTest.interactWithDao();

        assertThings(BOCaptor.getValue());
    }
}

感谢您的想法！