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트러블 슈팅 및 팁을 모아두는 레포 (Today I Learned)
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Springboot @MockBean을 이용해서 Mocking을 하는데 다음과 같은 에러 발생 (Mockito cannot mock this class: class [클래스명]) #244

Closed yeoseon closed 4 years ago

yeoseon commented 4 years ago

SampleService를 Mocking 하기 위해 다음과 같이 작성하여 실행했다. 

@RunWith(SpringRunner.class)
@SpringBootTest(webEnvironment = SpringBootTest.WebEnvironment.RANDOM_PORT)
@AutoConfigureMockMvc
public class SampleControllerTest {

    @Autowired
    TestRestTemplate testRestTemplate;

    @MockBean
    SampleService mockSampleService;

    @Test
    public void hello() throws Exception {
        when(mockSampleService.getName()).thenReturn("celine");

        String result = testRestTemplate.getForObject("/hello", String.class);
        assertThat(result).isEqualTo("hello celine");
    }
}

SampleService는 non-private, non-static인데 아래와 같은 에러가 발생함 

20-09-18 11:22:06.553 ERROR 61492 --- [           main] o.s.boot.SpringApplication               : Application run failed

org.mockito.exceptions.base.MockitoException: 
Mockito cannot mock this class: class me.yeoseon.sample.SampleService.

Mockito can only mock non-private & non-final classes.
If you're not sure why you're getting this error, please report to the mailing list.

Java               : 12
JVM vendor name    : Oracle Corporation
JVM vendor version : 12.0.1+12
JVM name           : Java HotSpot(TM) 64-Bit Server VM
JVM version        : 12.0.1+12
JVM info           : mixed mode, sharing
OS name            : Mac OS X
OS version         : 10.15.6

Underlying exception : java.lang.UnsupportedOperationException: Cannot define class using reflection
    at org.springframework.boot.test.mock.mockito.MockDefinition.createMock(MockDefinition.java:157) ~[spring-boot-test-2.0.3.RELEASE.jar:2.0.3.RELEASE]
    at org.springframework.boot.test.mock.mockito.MockitoPostProcessor.createMock(MockitoPostProcessor.java:222) ~[spring-boot-test-2.0.3.RELEASE.jar:2.0.3.RELEASE]
    at org.springframework.boot.test.mock.mockito.MockitoPostProcessor.registerMock(MockitoPostProcessor.java:192) ~[spring-boot-test-2.0.3.RELEASE.jar:2.0.3.RELEASE]
    at org.springframework.boot.test.mock.mockito.MockitoPostProcessor.register(MockitoPostProcessor.java:174) ~[spring-boot-test-2.0.3.RELEASE.jar:2.0.3.RELEASE]
    at org.springframework.boot.test.mock.mockito.MockitoPostProcessor.postProcessBeanFactory(MockitoPostProcessor.java:144) ~[spring-boot-test-2.0.3.RELEASE.jar:2.0.3.RELEASE]
    at org.springframework.boot.test.mock.mockito.MockitoPostProcessor.postProcessBeanFactory(MockitoPostProcessor.java:131) ~[spring-boot-test-2.0.3.RELEASE.jar:2.0.3.RELEASE]
    at org.springframework.context.support.PostProcessorRegistrationDelegate.invokeBeanFactoryPostProcessors(PostProcessorRegistrationDelegate.java:284) ~[spring-context-5.0.7.RELEASE.jar:5.0.7.RELEASE]
    at org.springframework.context.support.PostProcessorRegistrationDelegate.invokeBeanFactoryPostProcessors(PostProcessorRegistrationDelegate.java:172) ~[spring-context-5.0.7.RELEASE.jar:5.0.7.RELEASE]
    at org.springframework.context.support.AbstractApplicationContext.invokeBeanFactoryPostProcessors(AbstractApplicationContext.java:694) ~[spring-context-5.0.7.RELEASE.jar:5.0.7.RELEASE]
    at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:532) ~[spring-context-5.0.7.RELEASE.jar:5.0.7.RELEASE]
    at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:140) ~[spring-boot-2.0.3.RELEASE.jar:2.0.3.RELEASE]
    at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:759) ~[spring-boot-2.0.3.RELEASE.jar:2.0.3.RELEASE]
    at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:395) ~[spring-boot-2.0.3.RELEASE.jar:2.0.3.RELEASE]
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:327) ~[spring-boot-2.0.3.RELEASE.jar:2.0.3.RELEASE]
    at org.springframework.boot.test.context.SpringBootContextLoader.loadContext(SpringBootContextLoader.java:139) ~[spring-boot-test-2.0.3.RELEASE.jar:2.0.3.RELEASE]
    at org.springframework.test.context.cache.DefaultCacheAwareContextLoaderDelegate.loadContextInternal(DefaultCacheAwareContextLoaderDelegate.java:99) ~[spring-test-5.0.7.RELEASE.jar:5.0.7.RELEASE]
    at org.springframework.test.context.cache.DefaultCacheAwareContextLoaderDelegate.loadContext(DefaultCacheAwareContextLoaderDelegate.java:117) ~[spring-test-5.0.7.RELEASE.jar:5.0.7.RELEASE]
    at org.springframework.test.context.support.DefaultTestContext.getApplicationContext(DefaultTestContext.java:108) ~[spring-test-5.0.7.RELEASE.jar:5.0.7.RELEASE]
    at org.springframework.boot.test.mock.mockito.MockitoTestExecutionListener.postProcessFields(MockitoTestExecutionListener.java:99) ~[spring-boot-test-2.0.3.RELEASE.jar:2.0.3.RELEASE]
    at org.springframework.boot.test.mock.mockito.MockitoTestExecutionListener.injectFields(MockitoTestExecutionListener.java:79) ~[spring-boot-test-2.0.3.RELEASE.jar:2.0.3.RELEASE]
    at org.springframework.boot.test.mock.mockito.MockitoTestExecutionListener.prepareTestInstance(MockitoTestExecutionListener.java:54) ~[spring-boot-test-2.0.3.RELEASE.jar:2.0.3.RELEASE]
    at org.springframework.test.context.TestContextManager.prepareTestInstance(TestContextManager.java:246) ~[spring-test-5.0.7.RELEASE.jar:5.0.7.RELEASE]
    at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.createTest(SpringJUnit4ClassRunner.java:227) ~[spring-test-5.0.7.RELEASE.jar:5.0.7.RELEASE]
    at org.springframework.test.context.junit4.SpringJUnit4ClassRunner$1.runReflectiveCall(SpringJUnit4ClassRunner.java:289) ~[spring-test-5.0.7.RELEASE.jar:5.0.7.RELEASE]
    at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12) ~[junit-4.12.jar:4.12]
    at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.methodBlock(SpringJUnit4ClassRunner.java:291) ~[spring-test-5.0.7.RELEASE.jar:5.0.7.RELEASE]
    at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild(SpringJUnit4ClassRunner.java:246) ~[spring-test-5.0.7.RELEASE.jar:5.0.7.RELEASE]
    at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild(SpringJUnit4ClassRunner.java:97) ~[spring-test-5.0.7.RELEASE.jar:5.0.7.RELEASE]
    at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290) ~[junit-4.12.jar:4.12]
    at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71) ~[junit-4.12.jar:4.12]
    at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288) ~[junit-4.12.jar:4.12]
    at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58) ~[junit-4.12.jar:4.12]
    at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268) ~[junit-4.12.jar:4.12]
    at org.springframework.test.context.junit4.statements.RunBeforeTestClassCallbacks.evaluate(RunBeforeTestClassCallbacks.java:61) ~[spring-test-5.0.7.RELEASE.jar:5.0.7.RELEASE]
    at org.springframework.test.context.junit4.statements.RunAfterTestClassCallbacks.evaluate(RunAfterTestClassCallbacks.java:70) ~[spring-test-5.0.7.RELEASE.jar:5.0.7.RELEASE]
    at org.junit.runners.ParentRunner.run(ParentRunner.java:363) ~[junit-4.12.jar:4.12]
    at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.run(SpringJUnit4ClassRunner.java:190) ~[spring-test-5.0.7.RELEASE.jar:5.0.7.RELEASE]
    at org.junit.runner.JUnitCore.run(JUnitCore.java:137) ~[junit-4.12.jar:4.12]
    at com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:68) ~[junit-rt.jar:na]
    at com.intellij.rt.junit.IdeaTestRunner$Repeater.startRunnerWithArgs(IdeaTestRunner.java:33) ~[junit-rt.jar:na]
    at com.intellij.rt.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:230) ~[junit-rt.jar:na]
    at com.intellij.rt.junit.JUnitStarter.main(JUnitStarter.java:58) ~[junit-rt.jar:na]
Caused by: java.lang.UnsupportedOperationException: Cannot define class using reflection
    at net.bytebuddy.dynamic.loading.ClassInjector$UsingReflection$Dispatcher$Unavailable.defineClass(ClassInjector.java:821) ~[byte-buddy-1.7.11.jar:na]
    at net.bytebuddy.dynamic.loading.ClassInjector$UsingReflection.inject(ClassInjector.java:185) ~[byte-buddy-1.7.11.jar:na]
    at net.bytebuddy.dynamic.loading.ClassLoadingStrategy$Default$InjectionDispatcher.load(ClassLoadingStrategy.java:187) ~[byte-buddy-1.7.11.jar:na]
    at net.bytebuddy.dynamic.TypeResolutionStrategy$Passive.initialize(TypeResolutionStrategy.java:79) ~[byte-buddy-1.7.11.jar:na]
    at net.bytebuddy.dynamic.DynamicType$Default$Unloaded.load(DynamicType.java:4457) ~[byte-buddy-1.7.11.jar:na]
    at org.mockito.internal.creation.bytebuddy.SubclassBytecodeGenerator.mockClass(SubclassBytecodeGenerator.java:121) ~[mockito-core-2.15.0.jar:na]
    at org.mockito.internal.creation.bytebuddy.TypeCachingBytecodeGenerator$1.call(TypeCachingBytecodeGenerator.java:37) ~[mockito-core-2.15.0.jar:na]
    at org.mockito.internal.creation.bytebuddy.TypeCachingBytecodeGenerator$1.call(TypeCachingBytecodeGenerator.java:34) ~[mockito-core-2.15.0.jar:na]
    at net.bytebuddy.TypeCache.findOrInsert(TypeCache.java:138) ~[byte-buddy-1.7.11.jar:na]
    at net.bytebuddy.TypeCache$WithInlineExpunction.findOrInsert(TypeCache.java:346) ~[byte-buddy-1.7.11.jar:na]
    at net.bytebuddy.TypeCache.findOrInsert(TypeCache.java:161) ~[byte-buddy-1.7.11.jar:na]
    at net.bytebuddy.TypeCache$WithInlineExpunction.findOrInsert(TypeCache.java:355) ~[byte-buddy-1.7.11.jar:na]
    at org.mockito.internal.creation.bytebuddy.TypeCachingBytecodeGenerator.mockClass(TypeCachingBytecodeGenerator.java:32) ~[mockito-core-2.15.0.jar:na]
    at org.mockito.internal.creation.bytebuddy.SubclassByteBuddyMockMaker.createMockType(SubclassByteBuddyMockMaker.java:71) ~[mockito-core-2.15.0.jar:na]
    at org.mockito.internal.creation.bytebuddy.SubclassByteBuddyMockMaker.createMock(SubclassByteBuddyMockMaker.java:42) ~[mockito-core-2.15.0.jar:na]
    at org.mockito.internal.creation.bytebuddy.ByteBuddyMockMaker.createMock(ByteBuddyMockMaker.java:25) ~[mockito-core-2.15.0.jar:na]
    at org.mockito.internal.util.MockUtil.createMock(MockUtil.java:35) ~[mockito-core-2.15.0.jar:na]
    at org.mockito.internal.MockitoCore.mock(MockitoCore.java:65) ~[mockito-core-2.15.0.jar:na]
    at org.mockito.Mockito.mock(Mockito.java:1855) ~[mockito-core-2.15.0.jar:na]
    ... 42 common frames omitted
Caused by: java.lang.IllegalStateException: Could not find sun.misc.Unsafe
    at net.bytebuddy.dynamic.loading.ClassInjector$UsingUnsafe$Dispatcher$Disabled.initialize(ClassInjector.java:1366) ~[byte-buddy-1.7.11.jar:na]
    at net.bytebuddy.dynamic.loading.ClassInjector$UsingUnsafe.inject(ClassInjector.java:1202) ~[byte-buddy-1.7.11.jar:na]
    at net.bytebuddy.dynamic.loading.ClassLoadingStrategy$ForUnsafeInjection.load(ClassLoadingStrategy.java:458) ~[byte-buddy-1.7.11.jar:na]
    at net.bytebuddy.dynamic.TypeResolutionStrategy$Passive.initialize(TypeResolutionStrategy.java:79) ~[byte-buddy-1.7.11.jar:na]
    at net.bytebuddy.dynamic.DynamicType$Default$Unloaded.load(DynamicType.java:4457) ~[byte-buddy-1.7.11.jar:na]
    at net.bytebuddy.dynamic.loading.ClassInjector$UsingReflection$Dispatcher$Indirect.make(ClassInjector.java:684) ~[byte-buddy-1.7.11.jar:na]
    at net.bytebuddy.dynamic.loading.ClassInjector$UsingReflection$Dispatcher$CreationAction.run(ClassInjector.java:302) ~[byte-buddy-1.7.11.jar:na]
    at net.bytebuddy.dynamic.loading.ClassInjector$UsingReflection$Dispatcher$CreationAction.run(ClassInjector.java:290) ~[byte-buddy-1.7.11.jar:na]
    at java.base/java.security.AccessController.doPrivileged(AccessController.java:310) ~[na:na]
    at net.bytebuddy.dynamic.loading.ClassInjector$UsingReflection.<clinit>(ClassInjector.java:70) ~[byte-buddy-1.7.11.jar:na]
    at net.bytebuddy.dynamic.loading.ClassLoadingStrategy$Default$InjectionDispatcher.load(ClassLoadingStrategy.java:184) ~[byte-buddy-1.7.11.jar:na]
    ... 58 common frames omitted
Caused by: java.lang.NoSuchMethodException: sun.misc.Unsafe.defineClass(java.lang.String,[B,int,int,java.lang.ClassLoader,java.security.ProtectionDomain)
    at java.base/java.lang.Class.getMethod(Class.java:2114) ~[na:na]
    at net.bytebuddy.dynamic.loading.ClassInjector$UsingUnsafe$Dispatcher$CreationAction.run(ClassInjector.java:1269) ~[byte-buddy-1.7.11.jar:na]
    at net.bytebuddy.dynamic.loading.ClassInjector$UsingUnsafe$Dispatcher$CreationAction.run(ClassInjector.java:1257) ~[byte-buddy-1.7.11.jar:na]
    at java.base/java.security.AccessController.doPrivileged(AccessController.java:310) ~[na:na]
    at net.bytebuddy.dynamic.loading.ClassInjector$UsingUnsafe.<clinit>(ClassInjector.java:1136) ~[byte-buddy-1.7.11.jar:na]
    ... 67 common frames omitted

2020-09-18 11:22:06.555  INFO 61492 --- [           main] ConfigServletWebServerApplicationContext : Closing org.springframework.boot.web.servlet.context.AnnotationConfigServletWebServerApplicationContext@7393222f: startup date [Fri Sep 18 11:22:05 KST 2020]; root of context hierarchy
2020-09-18 11:22:06.557 ERROR 61492 --- [           main] o.s.test.context.TestContextManager      : Caught exception while allowing TestExecutionListener [org.springframework.boot.test.mock.mockito.MockitoTestExecutionListener@1151e434] to prepare test instance [me.yeoseon.sample.SampleControllerTest@35764bef]

java.lang.IllegalStateException: Failed to load ApplicationContext
    at org.springframework.test.context.cache.DefaultCacheAwareContextLoaderDelegate.loadContext(DefaultCacheAwareContextLoaderDelegate.java:125) ~[spring-test-5.0.7.RELEASE.jar:5.0.7.RELEASE]
    at org.springframework.test.context.support.DefaultTestContext.getApplicationContext(DefaultTestContext.java:108) ~[spring-test-5.0.7.RELEASE.jar:5.0.7.RELEASE]
    at org.springframework.boot.test.mock.mockito.MockitoTestExecutionListener.postProcessFields(MockitoTestExecutionListener.java:99) ~[spring-boot-test-2.0.3.RELEASE.jar:2.0.3.RELEASE]
    at org.springframework.boot.test.mock.mockito.MockitoTestExecutionListener.injectFields(MockitoTestExecutionListener.java:79) ~[spring-boot-test-2.0.3.RELEASE.jar:2.0.3.RELEASE]
    at org.springframework.boot.test.mock.mockito.MockitoTestExecutionListener.prepareTestInstance(MockitoTestExecutionListener.java:54) ~[spring-boot-test-2.0.3.RELEASE.jar:2.0.3.RELEASE]
    at org.springframework.test.context.TestContextManager.prepareTestInstance(TestContextManager.java:246) ~[spring-test-5.0.7.RELEASE.jar:5.0.7.RELEASE]
    at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.createTest(SpringJUnit4ClassRunner.java:227) ~[spring-test-5.0.7.RELEASE.jar:5.0.7.RELEASE]
    at org.springframework.test.context.junit4.SpringJUnit4ClassRunner$1.runReflectiveCall(SpringJUnit4ClassRunner.java:289) ~[spring-test-5.0.7.RELEASE.jar:5.0.7.RELEASE]
    at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12) ~[junit-4.12.jar:4.12]
    at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.methodBlock(SpringJUnit4ClassRunner.java:291) ~[spring-test-5.0.7.RELEASE.jar:5.0.7.RELEASE]
    at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild(SpringJUnit4ClassRunner.java:246) ~[spring-test-5.0.7.RELEASE.jar:5.0.7.RELEASE]
    at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild(SpringJUnit4ClassRunner.java:97) ~[spring-test-5.0.7.RELEASE.jar:5.0.7.RELEASE]
    at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290) ~[junit-4.12.jar:4.12]
    at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71) ~[junit-4.12.jar:4.12]
    at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288) ~[junit-4.12.jar:4.12]
    at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58) ~[junit-4.12.jar:4.12]
    at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268) ~[junit-4.12.jar:4.12]
    at org.springframework.test.context.junit4.statements.RunBeforeTestClassCallbacks.evaluate(RunBeforeTestClassCallbacks.java:61) ~[spring-test-5.0.7.RELEASE.jar:5.0.7.RELEASE]
    at org.springframework.test.context.junit4.statements.RunAfterTestClassCallbacks.evaluate(RunAfterTestClassCallbacks.java:70) ~[spring-test-5.0.7.RELEASE.jar:5.0.7.RELEASE]
    at org.junit.runners.ParentRunner.run(ParentRunner.java:363) ~[junit-4.12.jar:4.12]
    at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.run(SpringJUnit4ClassRunner.java:190) ~[spring-test-5.0.7.RELEASE.jar:5.0.7.RELEASE]
    at org.junit.runner.JUnitCore.run(JUnitCore.java:137) ~[junit-4.12.jar:4.12]
    at com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:68) ~[junit-rt.jar:na]
    at com.intellij.rt.junit.IdeaTestRunner$Repeater.startRunnerWithArgs(IdeaTestRunner.java:33) ~[junit-rt.jar:na]
    at com.intellij.rt.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:230) ~[junit-rt.jar:na]
    at com.intellij.rt.junit.JUnitStarter.main(JUnitStarter.java:58) ~[junit-rt.jar:na]
Caused by: org.mockito.exceptions.base.MockitoException: 
Mockito cannot mock this class: class me.yeoseon.sample.SampleService.

Mockito can only mock non-private & non-final classes.
If you're not sure why you're getting this error, please report to the mailing list.

Java               : 12
JVM vendor name    : Oracle Corporation
JVM vendor version : 12.0.1+12
JVM name           : Java HotSpot(TM) 64-Bit Server VM
JVM version        : 12.0.1+12
JVM info           : mixed mode, sharing
OS name            : Mac OS X
OS version         : 10.15.6

Underlying exception : java.lang.UnsupportedOperationException: Cannot define class using reflection
    at org.springframework.boot.test.mock.mockito.MockDefinition.createMock(MockDefinition.java:157) ~[spring-boot-test-2.0.3.RELEASE.jar:2.0.3.RELEASE]
    at org.springframework.boot.test.mock.mockito.MockitoPostProcessor.createMock(MockitoPostProcessor.java:222) ~[spring-boot-test-2.0.3.RELEASE.jar:2.0.3.RELEASE]
    at org.springframework.boot.test.mock.mockito.MockitoPostProcessor.registerMock(MockitoPostProcessor.java:192) ~[spring-boot-test-2.0.3.RELEASE.jar:2.0.3.RELEASE]
    at org.springframework.boot.test.mock.mockito.MockitoPostProcessor.register(MockitoPostProcessor.java:174) ~[spring-boot-test-2.0.3.RELEASE.jar:2.0.3.RELEASE]
    at org.springframework.boot.test.mock.mockito.MockitoPostProcessor.postProcessBeanFactory(MockitoPostProcessor.java:144) ~[spring-boot-test-2.0.3.RELEASE.jar:2.0.3.RELEASE]
    at org.springframework.boot.test.mock.mockito.MockitoPostProcessor.postProcessBeanFactory(MockitoPostProcessor.java:131) ~[spring-boot-test-2.0.3.RELEASE.jar:2.0.3.RELEASE]
    at org.springframework.context.support.PostProcessorRegistrationDelegate.invokeBeanFactoryPostProcessors(PostProcessorRegistrationDelegate.java:284) ~[spring-context-5.0.7.RELEASE.jar:5.0.7.RELEASE]
    at org.springframework.context.support.PostProcessorRegistrationDelegate.invokeBeanFactoryPostProcessors(PostProcessorRegistrationDelegate.java:172) ~[spring-context-5.0.7.RELEASE.jar:5.0.7.RELEASE]
    at org.springframework.context.support.AbstractApplicationContext.invokeBeanFactoryPostProcessors(AbstractApplicationContext.java:694) ~[spring-context-5.0.7.RELEASE.jar:5.0.7.RELEASE]
    at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:532) ~[spring-context-5.0.7.RELEASE.jar:5.0.7.RELEASE]
    at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:140) ~[spring-boot-2.0.3.RELEASE.jar:2.0.3.RELEASE]
    at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:759) ~[spring-boot-2.0.3.RELEASE.jar:2.0.3.RELEASE]
    at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:395) ~[spring-boot-2.0.3.RELEASE.jar:2.0.3.RELEASE]
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:327) ~[spring-boot-2.0.3.RELEASE.jar:2.0.3.RELEASE]
    at org.springframework.boot.test.context.SpringBootContextLoader.loadContext(SpringBootContextLoader.java:139) ~[spring-boot-test-2.0.3.RELEASE.jar:2.0.3.RELEASE]
    at org.springframework.test.context.cache.DefaultCacheAwareContextLoaderDelegate.loadContextInternal(DefaultCacheAwareContextLoaderDelegate.java:99) ~[spring-test-5.0.7.RELEASE.jar:5.0.7.RELEASE]
    at org.springframework.test.context.cache.DefaultCacheAwareContextLoaderDelegate.loadContext(DefaultCacheAwareContextLoaderDelegate.java:117) ~[spring-test-5.0.7.RELEASE.jar:5.0.7.RELEASE]
    ... 25 common frames omitted
Caused by: java.lang.UnsupportedOperationException: Cannot define class using reflection
    at net.bytebuddy.dynamic.loading.ClassInjector$UsingReflection$Dispatcher$Unavailable.defineClass(ClassInjector.java:821) ~[byte-buddy-1.7.11.jar:na]
    at net.bytebuddy.dynamic.loading.ClassInjector$UsingReflection.inject(ClassInjector.java:185) ~[byte-buddy-1.7.11.jar:na]
    at net.bytebuddy.dynamic.loading.ClassLoadingStrategy$Default$InjectionDispatcher.load(ClassLoadingStrategy.java:187) ~[byte-buddy-1.7.11.jar:na]
    at net.bytebuddy.dynamic.TypeResolutionStrategy$Passive.initialize(TypeResolutionStrategy.java:79) ~[byte-buddy-1.7.11.jar:na]
    at net.bytebuddy.dynamic.DynamicType$Default$Unloaded.load(DynamicType.java:4457) ~[byte-buddy-1.7.11.jar:na]
    at org.mockito.internal.creation.bytebuddy.SubclassBytecodeGenerator.mockClass(SubclassBytecodeGenerator.java:121) ~[mockito-core-2.15.0.jar:na]
    at org.mockito.internal.creation.bytebuddy.TypeCachingBytecodeGenerator$1.call(TypeCachingBytecodeGenerator.java:37) ~[mockito-core-2.15.0.jar:na]
    at org.mockito.internal.creation.bytebuddy.TypeCachingBytecodeGenerator$1.call(TypeCachingBytecodeGenerator.java:34) ~[mockito-core-2.15.0.jar:na]
    at net.bytebuddy.TypeCache.findOrInsert(TypeCache.java:138) ~[byte-buddy-1.7.11.jar:na]
    at net.bytebuddy.TypeCache$WithInlineExpunction.findOrInsert(TypeCache.java:346) ~[byte-buddy-1.7.11.jar:na]
    at net.bytebuddy.TypeCache.findOrInsert(TypeCache.java:161) ~[byte-buddy-1.7.11.jar:na]
    at net.bytebuddy.TypeCache$WithInlineExpunction.findOrInsert(TypeCache.java:355) ~[byte-buddy-1.7.11.jar:na]
    at org.mockito.internal.creation.bytebuddy.TypeCachingBytecodeGenerator.mockClass(TypeCachingBytecodeGenerator.java:32) ~[mockito-core-2.15.0.jar:na]
    at org.mockito.internal.creation.bytebuddy.SubclassByteBuddyMockMaker.createMockType(SubclassByteBuddyMockMaker.java:71) ~[mockito-core-2.15.0.jar:na]
    at org.mockito.internal.creation.bytebuddy.SubclassByteBuddyMockMaker.createMock(SubclassByteBuddyMockMaker.java:42) ~[mockito-core-2.15.0.jar:na]
    at org.mockito.internal.creation.bytebuddy.ByteBuddyMockMaker.createMock(ByteBuddyMockMaker.java:25) ~[mockito-core-2.15.0.jar:na]
    at org.mockito.internal.util.MockUtil.createMock(MockUtil.java:35) ~[mockito-core-2.15.0.jar:na]
    at org.mockito.internal.MockitoCore.mock(MockitoCore.java:65) ~[mockito-core-2.15.0.jar:na]
    at org.mockito.Mockito.mock(Mockito.java:1855) ~[mockito-core-2.15.0.jar:na]
    ... 42 common frames omitted
Caused by: java.lang.IllegalStateException: Could not find sun.misc.Unsafe
    at net.bytebuddy.dynamic.loading.ClassInjector$UsingUnsafe$Dispatcher$Disabled.initialize(ClassInjector.java:1366) ~[byte-buddy-1.7.11.jar:na]
    at net.bytebuddy.dynamic.loading.ClassInjector$UsingUnsafe.inject(ClassInjector.java:1202) ~[byte-buddy-1.7.11.jar:na]
    at net.bytebuddy.dynamic.loading.ClassLoadingStrategy$ForUnsafeInjection.load(ClassLoadingStrategy.java:458) ~[byte-buddy-1.7.11.jar:na]
    at net.bytebuddy.dynamic.TypeResolutionStrategy$Passive.initialize(TypeResolutionStrategy.java:79) ~[byte-buddy-1.7.11.jar:na]
    at net.bytebuddy.dynamic.DynamicType$Default$Unloaded.load(DynamicType.java:4457) ~[byte-buddy-1.7.11.jar:na]
    at net.bytebuddy.dynamic.loading.ClassInjector$UsingReflection$Dispatcher$Indirect.make(ClassInjector.java:684) ~[byte-buddy-1.7.11.jar:na]
    at net.bytebuddy.dynamic.loading.ClassInjector$UsingReflection$Dispatcher$CreationAction.run(ClassInjector.java:302) ~[byte-buddy-1.7.11.jar:na]
    at net.bytebuddy.dynamic.loading.ClassInjector$UsingReflection$Dispatcher$CreationAction.run(ClassInjector.java:290) ~[byte-buddy-1.7.11.jar:na]
    at java.base/java.security.AccessController.doPrivileged(AccessController.java:310) ~[na:na]
    at net.bytebuddy.dynamic.loading.ClassInjector$UsingReflection.<clinit>(ClassInjector.java:70) ~[byte-buddy-1.7.11.jar:na]
    at net.bytebuddy.dynamic.loading.ClassLoadingStrategy$Default$InjectionDispatcher.load(ClassLoadingStrategy.java:184) ~[byte-buddy-1.7.11.jar:na]
    ... 58 common frames omitted
Caused by: java.lang.NoSuchMethodException: sun.misc.Unsafe.defineClass(java.lang.String,[B,int,int,java.lang.ClassLoader,java.security.ProtectionDomain)
    at java.base/java.lang.Class.getMethod(Class.java:2114) ~[na:na]
    at net.bytebuddy.dynamic.loading.ClassInjector$UsingUnsafe$Dispatcher$CreationAction.run(ClassInjector.java:1269) ~[byte-buddy-1.7.11.jar:na]
    at net.bytebuddy.dynamic.loading.ClassInjector$UsingUnsafe$Dispatcher$CreationAction.run(ClassInjector.java:1257) ~[byte-buddy-1.7.11.jar:na]
    at java.base/java.security.AccessController.doPrivileged(AccessController.java:310) ~[na:na]
    at net.bytebuddy.dynamic.loading.ClassInjector$UsingUnsafe.<clinit>(ClassInjector.java:1136) ~[byte-buddy-1.7.11.jar:na]
    ... 67 common frames omitted

java.lang.IllegalStateException: Failed to load ApplicationContext

    at org.springframework.test.context.cache.DefaultCacheAwareContextLoaderDelegate.loadContext(DefaultCacheAwareContextLoaderDelegate.java:125)
    at org.springframework.test.context.support.DefaultTestContext.getApplicationContext(DefaultTestContext.java:108)
    at org.springframework.boot.test.mock.mockito.MockitoTestExecutionListener.postProcessFields(MockitoTestExecutionListener.java:99)
    at org.springframework.boot.test.mock.mockito.MockitoTestExecutionListener.injectFields(MockitoTestExecutionListener.java:79)
    at org.springframework.boot.test.mock.mockito.MockitoTestExecutionListener.prepareTestInstance(MockitoTestExecutionListener.java:54)
    at org.springframework.test.context.TestContextManager.prepareTestInstance(TestContextManager.java:246)
    at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.createTest(SpringJUnit4ClassRunner.java:227)
    at org.springframework.test.context.junit4.SpringJUnit4ClassRunner$1.runReflectiveCall(SpringJUnit4ClassRunner.java:289)
    at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
    at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.methodBlock(SpringJUnit4ClassRunner.java:291)
    at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild(SpringJUnit4ClassRunner.java:246)
    at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild(SpringJUnit4ClassRunner.java:97)
    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$2.evaluate(ParentRunner.java:268)
    at org.springframework.test.context.junit4.statements.RunBeforeTestClassCallbacks.evaluate(RunBeforeTestClassCallbacks.java:61)
    at org.springframework.test.context.junit4.statements.RunAfterTestClassCallbacks.evaluate(RunAfterTestClassCallbacks.java:70)
    at org.junit.runners.ParentRunner.run(ParentRunner.java:363)
    at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.run(SpringJUnit4ClassRunner.java:190)
    at org.junit.runner.JUnitCore.run(JUnitCore.java:137)
    at com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:68)
    at com.intellij.rt.junit.IdeaTestRunner$Repeater.startRunnerWithArgs(IdeaTestRunner.java:33)
    at com.intellij.rt.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:230)
    at com.intellij.rt.junit.JUnitStarter.main(JUnitStarter.java:58)
Caused by: org.mockito.exceptions.base.MockitoException: 
Mockito cannot mock this class: class me.yeoseon.sample.SampleService.

Mockito can only mock non-private & non-final classes.
If you're not sure why you're getting this error, please report to the mailing list.

Java               : 12
JVM vendor name    : Oracle Corporation
JVM vendor version : 12.0.1+12
JVM name           : Java HotSpot(TM) 64-Bit Server VM
JVM version        : 12.0.1+12
JVM info           : mixed mode, sharing
OS name            : Mac OS X
OS version         : 10.15.6

Underlying exception : java.lang.UnsupportedOperationException: Cannot define class using reflection
    at org.springframework.boot.test.mock.mockito.MockDefinition.createMock(MockDefinition.java:157)
    at org.springframework.boot.test.mock.mockito.MockitoPostProcessor.createMock(MockitoPostProcessor.java:222)
    at org.springframework.boot.test.mock.mockito.MockitoPostProcessor.registerMock(MockitoPostProcessor.java:192)
    at org.springframework.boot.test.mock.mockito.MockitoPostProcessor.register(MockitoPostProcessor.java:174)
    at org.springframework.boot.test.mock.mockito.MockitoPostProcessor.postProcessBeanFactory(MockitoPostProcessor.java:144)
    at org.springframework.boot.test.mock.mockito.MockitoPostProcessor.postProcessBeanFactory(MockitoPostProcessor.java:131)
    at org.springframework.context.support.PostProcessorRegistrationDelegate.invokeBeanFactoryPostProcessors(PostProcessorRegistrationDelegate.java:284)
    at org.springframework.context.support.PostProcessorRegistrationDelegate.invokeBeanFactoryPostProcessors(PostProcessorRegistrationDelegate.java:172)
    at org.springframework.context.support.AbstractApplicationContext.invokeBeanFactoryPostProcessors(AbstractApplicationContext.java:694)
    at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:532)
    at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:140)
    at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:759)
    at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:395)
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:327)
    at org.springframework.boot.test.context.SpringBootContextLoader.loadContext(SpringBootContextLoader.java:139)
    at org.springframework.test.context.cache.DefaultCacheAwareContextLoaderDelegate.loadContextInternal(DefaultCacheAwareContextLoaderDelegate.java:99)
    at org.springframework.test.context.cache.DefaultCacheAwareContextLoaderDelegate.loadContext(DefaultCacheAwareContextLoaderDelegate.java:117)
    ... 25 more
Caused by: java.lang.UnsupportedOperationException: Cannot define class using reflection
    at net.bytebuddy.dynamic.loading.ClassInjector$UsingReflection$Dispatcher$Unavailable.defineClass(ClassInjector.java:821)
    at net.bytebuddy.dynamic.loading.ClassInjector$UsingReflection.inject(ClassInjector.java:185)
    at net.bytebuddy.dynamic.loading.ClassLoadingStrategy$Default$InjectionDispatcher.load(ClassLoadingStrategy.java:187)
    at net.bytebuddy.dynamic.TypeResolutionStrategy$Passive.initialize(TypeResolutionStrategy.java:79)
    at net.bytebuddy.dynamic.DynamicType$Default$Unloaded.load(DynamicType.java:4457)
    at org.mockito.internal.creation.bytebuddy.SubclassBytecodeGenerator.mockClass(SubclassBytecodeGenerator.java:121)
    at org.mockito.internal.creation.bytebuddy.TypeCachingBytecodeGenerator$1.call(TypeCachingBytecodeGenerator.java:37)
    at org.mockito.internal.creation.bytebuddy.TypeCachingBytecodeGenerator$1.call(TypeCachingBytecodeGenerator.java:34)
    at net.bytebuddy.TypeCache.findOrInsert(TypeCache.java:138)
    at net.bytebuddy.TypeCache$WithInlineExpunction.findOrInsert(TypeCache.java:346)
    at net.bytebuddy.TypeCache.findOrInsert(TypeCache.java:161)
    at net.bytebuddy.TypeCache$WithInlineExpunction.findOrInsert(TypeCache.java:355)
    at org.mockito.internal.creation.bytebuddy.TypeCachingBytecodeGenerator.mockClass(TypeCachingBytecodeGenerator.java:32)
    at org.mockito.internal.creation.bytebuddy.SubclassByteBuddyMockMaker.createMockType(SubclassByteBuddyMockMaker.java:71)
    at org.mockito.internal.creation.bytebuddy.SubclassByteBuddyMockMaker.createMock(SubclassByteBuddyMockMaker.java:42)
    at org.mockito.internal.creation.bytebuddy.ByteBuddyMockMaker.createMock(ByteBuddyMockMaker.java:25)
    at org.mockito.internal.util.MockUtil.createMock(MockUtil.java:35)
    at org.mockito.internal.MockitoCore.mock(MockitoCore.java:65)
    at org.mockito.Mockito.mock(Mockito.java:1855)
    ... 42 more
Caused by: java.lang.IllegalStateException: Could not find sun.misc.Unsafe
    at net.bytebuddy.dynamic.loading.ClassInjector$UsingUnsafe$Dispatcher$Disabled.initialize(ClassInjector.java:1366)
    at net.bytebuddy.dynamic.loading.ClassInjector$UsingUnsafe.inject(ClassInjector.java:1202)
    at net.bytebuddy.dynamic.loading.ClassLoadingStrategy$ForUnsafeInjection.load(ClassLoadingStrategy.java:458)
    at net.bytebuddy.dynamic.TypeResolutionStrategy$Passive.initialize(TypeResolutionStrategy.java:79)
    at net.bytebuddy.dynamic.DynamicType$Default$Unloaded.load(DynamicType.java:4457)
    at net.bytebuddy.dynamic.loading.ClassInjector$UsingReflection$Dispatcher$Indirect.make(ClassInjector.java:684)
    at net.bytebuddy.dynamic.loading.ClassInjector$UsingReflection$Dispatcher$CreationAction.run(ClassInjector.java:302)
    at net.bytebuddy.dynamic.loading.ClassInjector$UsingReflection$Dispatcher$CreationAction.run(ClassInjector.java:290)
    at java.base/java.security.AccessController.doPrivileged(AccessController.java:310)
    at net.bytebuddy.dynamic.loading.ClassInjector$UsingReflection.<clinit>(ClassInjector.java:70)
    at net.bytebuddy.dynamic.loading.ClassLoadingStrategy$Default$InjectionDispatcher.load(ClassLoadingStrategy.java:184)
    ... 58 more
Caused by: java.lang.NoSuchMethodException: sun.misc.Unsafe.defineClass(java.lang.String,[B,int,int,java.lang.ClassLoader,java.security.ProtectionDomain)
    at java.base/java.lang.Class.getMethod(Class.java:2114)
    at net.bytebuddy.dynamic.loading.ClassInjector$UsingUnsafe$Dispatcher$CreationAction.run(ClassInjector.java:1269)
    at net.bytebuddy.dynamic.loading.ClassInjector$UsingUnsafe$Dispatcher$CreationAction.run(ClassInjector.java:1257)
    at java.base/java.security.AccessController.doPrivileged(AccessController.java:310)
    at net.bytebuddy.dynamic.loading.ClassInjector$UsingUnsafe.<clinit>(ClassInjector.java:1136)
    ... 67 more

Process finished with exit code 255
yeoseon commented 4 years ago

찾아보니 모두 mokito-core 라이브러리를 새로운 버전으로 추가하라는 말이 많았다.
Maven 구글링을 통해 추가 했을때, 2.10.0으로 추가될 때는 이 현상이 계속 발생했다.

https://stackoverflow.com/questions/52533878/mockito-error-in-spring-boot-tests-after-migrating-to-jdk-11

이 내용을 보고 2.22.0으로 바꾸니 잘 되었다.