Mockito/Powermock 使用 Kotlin 时未按预期工作

Question

我正在使用 mockito/powermock 版本 1.7.0，Spring Boot 2.0.0 M2，Kotlin 1.3.0。

我正在测试 Spring @Service class，它会注入一个存储库。我想在我的测试中模拟那个存储库，这样我就可以测试 class 本身。

我是 Kotlin 的新手，但我来自 Java，所以我尝试这样做 "the java way"，但可能我遗漏了什么...

这是我的服务界面：

interface MyService {
    fun create(myObject: MyObject): MyObject
}

...及其实现：

@Service
class DefaultMyService : MyService {
    @Autowired
    lateinit var myRepository: MyRepository
    override fun create(myObject: MyObject): MyObject = this.myRepository.insert(myObject)
}

这是我的存储库（我使用 Spring 数据和 Mongo）：

interface MyRepository: MongoRepository<MyObject, String>

这是我的测试class:

@RunWith(PowerMockRunner::class)
@PrepareForTest(MyService::class)
class MyServiceTest {
    @Mock
    lateinit var myRepository: MyRepository
    @InjectMocks
    lateinit var myService: MyService

    @Test
    fun shouldDoSomething() {
        val myObject = MyObject(name = "Marco")
        `when`(myRepository.insert(myObject)).thenReturn(myObject)
        assertEquals(myObject.name, this.myService.create(myObject).name)
    }
}

我在运行这个测试的时候，出现异常：

Exception in thread "main" java.lang.NoClassDefFoundError: org/mockito/exceptions/Reporter
    at sun.reflect.GeneratedSerializationConstructorAccessor5.newInstance(Unknown Source)
    at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
    at org.objenesis.instantiator.sun.SunReflectionFactoryInstantiator.newInstance(SunReflectionFactoryInstantiator.java:48)
    at org.powermock.reflect.internal.WhiteboxImpl.newInstance(WhiteboxImpl.java:260)
    at org.powermock.reflect.Whitebox.newInstance(Whitebox.java:139)
    at org.powermock.api.extension.reporter.AbstractMockingFrameworkReporterFactory.getInstanceForClassLoader(AbstractMockingFrameworkReporterFactory.java:41)
    at org.powermock.api.extension.reporter.AbstractMockingFrameworkReporterFactory.create(AbstractMockingFrameworkReporterFactory.java:35)
    at org.powermock.modules.junit4.common.internal.impl.JUnit4TestSuiteChunkerImpl.getMockingFrameworkReporter(JUnit4TestSuiteChunkerImpl.java:140)
    at org.powermock.modules.junit4.common.internal.impl.JUnit4TestSuiteChunkerImpl.run(JUnit4TestSuiteChunkerImpl.java:119)
    at org.powermock.modules.junit4.common.internal.impl.AbstractCommonPowerMockRunner.run(AbstractCommonPowerMockRunner.java:57)
    at org.powermock.modules.junit4.PowerMockRunner.run(PowerMockRunner.java:59)
    at org.junit.runner.JUnitCore.run(JUnitCore.java:137)
    at com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:68)
    at com.intellij.rt.execution.junit.IdeaTestRunner$Repeater.startRunnerWithArgs(IdeaTestRunner.java:51)
    at com.intellij.rt.execution.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:242)
    at com.intellij.rt.execution.junit.JUnitStarter.main(JUnitStarter.java:70)
Caused by: java.lang.ClassNotFoundException: org.mockito.exceptions.Reporter
    at java.net.URLClassLoader.findClass(URLClassLoader.java:381)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
    at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:335)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
    at org.powermock.core.classloader.MockClassLoader.loadModifiedClass(MockClassLoader.java:202)
    at org.powermock.core.classloader.DeferSupportingClassLoader.loadClass1(DeferSupportingClassLoader.java:89)
    at org.powermock.core.classloader.DeferSupportingClassLoader.loadClass(DeferSupportingClassLoader.java:79)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
... 16 more

我做错了什么？我认为是某些配置的问题，但我无法准确理解错误所在。

Answer 1

您的 mockito 和 powermock 版本似乎不能很好地协同工作。您必须使用兼容的版本。查看 powermock 的兼容性矩阵 https://github.com/powermock/powermock/wiki/Mockito#supported-versions

最新兼容的是 Mockito：2.8.x 与 PowerMock：1.7.0

Mockito/Powermock 使用 Kotlin 时未按预期工作

Mockito/Powermock not working as expected with Kotlin

spring

dependency-injection

mockito

powermock

kotlin