Mockito/Powermock not working as expected with Kotlin - spring

Question

I'm using mockito/powermock version 1.7.0, Spring Boot 2.0.0 M2, Kotlin 1.3.0.
I'm testing a Spring #Service class, that inject a Repository.
I want to mock that repository on my tests, so I can just test the class itself.
I'm new to Kotlin, but I come from Java, so I tried doing this "the java way", but probably I'm missing something...
Here is my Service interface:
interface MyService {
fun create(myObject: MyObject): MyObject
}
... and its implementation:
#Service
class DefaultMyService : MyService {
#Autowired
lateinit var myRepository: MyRepository
override fun create(myObject: MyObject): MyObject = this.myRepository.insert(myObject)
}
Here is my repository (I'm using Spring Data with Mongo):
interface MyRepository: MongoRepository<MyObject, String>
Here is my test 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)
}
}
When I run this test, an exception occurs:
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
What am I doing wrong? I think it's an issue with some configuration, but I can't understand exactly where the mistake is.

Answer 1

It seems like that your mockito and powermock versions are not working very well together. You have to use versions which are compatible. See the compatibility matrix of powermock https://github.com/powermock/powermock/wiki/Mockito#supported-versions
Latest compatible is Mockito: 2.8.x with PowerMock: 1.7.0