HelloRepositoryTest의 오류...

Question

안녕하세요 강사님! 강의 거의 막바지를 달려가고있네요 좋은강의 감사합니다!   다른게아니고 HelloRepositoryTest를 돌리는데     expected: null but was: tobyspring.helloboot.Hello@5546e754 org.opentest4j.AssertionFailedError: expected: null but was: tobyspring.helloboot.Hello@5546e754 at java.base@11/jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) at java.base@11/jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance( NativeConstructorAccessorImpl.java:62 ) at java.base@11/jdk.internal.reflect.DelegatingConstructorAccessorImpl.newInstance( DelegatingConstructorAccessorImpl.java:45 ) at app//tobyspring.helloboot.HelloRepositoryTest.findHelloFailed( HelloRepositoryTest.java:17 ) at java.base@11/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at java.base@11/jdk.internal.reflect.NativeMethodAccessorImpl.invoke( NativeMethodAccessorImpl.java:62 ) at java.base@11/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke( DelegatingMethodAccessorImpl.java:43 ) at java.base@11/java.lang.reflect.Method.invoke( Method.java:566 ) at app//org.junit.platform.commons.util.ReflectionUtils.invokeMethod( ReflectionUtils.java:725 ) at app//org.junit.jupiter.engine.execution.MethodInvocation.proceed( MethodInvocation.java:60 ) at app//org.junit.jupiter.engine.execution.InvocationInterceptorChain$ValidatingInvocation.proceed( InvocationInterceptorChain.java:131 ) at app//org.junit.jupiter.engine.extension.TimeoutExtension.intercept( TimeoutExtension.java:149 ) at app//org.junit.jupiter.engine.extension.TimeoutExtension.interceptTestableMethod( TimeoutExtension.java:140 ) at app//org.junit.jupiter.engine.extension.TimeoutExtension.interceptTestMethod( TimeoutExtension.java:84 ) at app//org.junit.jupiter.engine.execution.ExecutableInvoker$ReflectiveInterceptorCall.lambda$ofVoidMethod$0( ExecutableInvoker.java:115 ) at app//org.junit.jupiter.engine.execution.ExecutableInvoker.lambda$invoke$0( ExecutableInvoker.java:105 ) at app//org.junit.jupiter.engine.execution.InvocationInterceptorChain$InterceptedInvocation.proceed( InvocationInterceptorChain.java:106 ) at app//org.junit.jupiter.engine.execution.InvocationInterceptorChain.proceed( InvocationInterceptorChain.java:64 ) at app//org.junit.jupiter.engine.execution.InvocationInterceptorChain.chainAndInvoke( InvocationInterceptorChain.java:45 ) at app//org.junit.jupiter.engine.execution.InvocationInterceptorChain.invoke( InvocationInterceptorChain.java:37 ) at app//org.junit.jupiter.engine.execution.ExecutableInvoker.invoke( ExecutableInvoker.java:104 ) at app//org.junit.jupiter.engine.execution.ExecutableInvoker.invoke( ExecutableInvoker.java:98 ) at app//org.junit.jupiter.engine.descriptor.TestMethodTestDescriptor.lambda$invokeTestMethod$7( TestMethodTestDescriptor.java:214 ) at app//org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute( ThrowableCollector.java:73 ) at app//org.junit.jupiter.engine.descriptor.TestMethodTestDescriptor.invokeTestMethod( TestMethodTestDescriptor.java:210 ) at app//org.junit.jupiter.engine.descriptor.TestMethodTestDescriptor.execute( TestMethodTestDescriptor.java:135 ) at app//org.junit.jupiter.engine.descriptor.TestMethodTestDescriptor.execute( TestMethodTestDescriptor.java:66 ) at app//org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$6( NodeTestTask.java:151 ) at app//org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute( ThrowableCollector.java:73 ) at app//org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$8( NodeTestTask.java:141 ) at app//org.junit.platform.engine.support.hierarchical.Node.around( Node.java:137 ) at app//org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$9( NodeTestTask.java:139 ) at app//org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute( ThrowableCollector.java:73 ) at app//org.junit.platform.engine.support.hierarchical.NodeTestTask.executeRecursively( NodeTestTask.java:138 ) at app//org.junit.platform.engine.support.hierarchical.NodeTestTask.execute( NodeTestTask.java:95 ) at java.base@11/java.util.ArrayList.forEach( ArrayList.java:1540 ) at app//org.junit.platform.engine.support.hierarchical.SameThreadHierarchicalTestExecutorService.invokeAll( SameThreadHierarchicalTestExecutorService.java:41 ) at app//org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$6( NodeTestTask.java:155 ) at app//org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute( ThrowableCollector.java:73 ) at app//org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$8( NodeTestTask.java:141 ) at app//org.junit.platform.engine.support.hierarchical.Node.around( Node.java:137 ) at app//org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$9( NodeTestTask.java:139 ) at app//org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute( ThrowableCollector.java:73 ) at app//org.junit.platform.engine.support.hierarchical.NodeTestTask.executeRecursively( NodeTestTask.java:138 ) at app//org.junit.platform.engine.support.hierarchical.NodeTestTask.execute( NodeTestTask.java:95 ) at java.base@11/java.util.ArrayList.forEach( ArrayList.java:1540 ) at app//org.junit.platform.engine.support.hierarchical.SameThreadHierarchicalTestExecutorService.invokeAll( SameThreadHierarchicalTestExecutorService.java:41 ) at app//org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$6( NodeTestTask.java:155 ) at app//org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute( ThrowableCollector.java:73 ) at app//org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$8( NodeTestTask.java:141 ) at app//org.junit.platform.engine.support.hierarchical.Node.around( Node.java:137 ) at app//org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$9( NodeTestTask.java:139 ) at app//org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute( ThrowableCollector.java:73 ) at app//org.junit.platform.engine.support.hierarchical.NodeTestTask.executeRecursively( NodeTestTask.java:138 ) at app//org.junit.platform.engine.support.hierarchical.NodeTestTask.execute( NodeTestTask.java:95 ) at app//org.junit.platform.engine.support.hierarchical.SameThreadHierarchicalTestExecutorService.submit( SameThreadHierarchicalTestExecutorService.java:35 ) at app//org.junit.platform.engine.support.hierarchical.HierarchicalTestExecutor.execute( HierarchicalTestExecutor.java:57 ) at app//org.junit.platform.engine.support.hierarchical.HierarchicalTestEngine.execute( HierarchicalTestEngine.java:54 ) at org.junit.platform.launcher.core.EngineExecutionOrchestrator.execute( EngineExecutionOrchestrator.java:107 ) at org.junit.platform.launcher.core.EngineExecutionOrchestrator.execute( EngineExecutionOrchestrator.java:88 ) at org.junit.platform.launcher.core.EngineExecutionOrchestrator.lambda$execute$0( EngineExecutionOrchestrator.java:54 ) at org.junit.platform.launcher.core.EngineExecutionOrchestrator.withInterceptedStreams( EngineExecutionOrchestrator.java:67 ) at org.junit.platform.launcher.core.EngineExecutionOrchestrator.execute( EngineExecutionOrchestrator.java:52 ) at org.junit.platform.launcher.core.DefaultLauncher.execute( DefaultLauncher.java:114 ) at org.junit.platform.launcher.core.DefaultLauncher.execute( DefaultLauncher.java:86 ) at org.junit.platform.launcher.core.DefaultLauncherSession$DelegatingLauncher.execute( DefaultLauncherSession.java:86 ) at org.junit.platform.launcher.core.SessionPerRequestLauncher.execute( SessionPerRequestLauncher.java:53 ) at org.gradle.api.internal.tasks.testing.junitplatform.JUnitPlatformTestClassProcessor$CollectAllTestClassesExecutor.processAllTestClasses( JUnitPlatformTestClassProcessor.java:99 ) at org.gradle.api.internal.tasks.testing.junitplatform.JUnitPlatformTestClassProcessor$CollectAllTestClassesExecutor.access$000( JUnitPlatformTestClassProcessor.java:79 ) at org.gradle.api.internal.tasks.testing.junitplatform.JUnitPlatformTestClassProcessor.stop( JUnitPlatformTestClassProcessor.java:75 ) at org.gradle.api.internal.tasks.testing.SuiteTestClassProcessor.stop( SuiteTestClassProcessor.java:62 ) at java.base@11/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at java.base@11/jdk.internal.reflect.NativeMethodAccessorImpl.invoke( NativeMethodAccessorImpl.java:62 ) at java.base@11/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke( DelegatingMethodAccessorImpl.java:43 ) at java.base@11/java.lang.reflect.Method.invoke( Method.java:566 ) at org.gradle.internal.dispatch.ReflectionDispatch.dispatch( ReflectionDispatch.java:36 ) at org.gradle.internal.dispatch.ReflectionDispatch.dispatch( ReflectionDispatch.java:24 ) at org.gradle.internal.dispatch.ContextClassLoaderDispatch.dispatch( ContextClassLoaderDispatch.java:33 ) at org.gradle.internal.dispatch.ProxyDispatchAdapter$DispatchingInvocationHandler.invoke( ProxyDispatchAdapter.java:94 ) at com.sun.proxy.$Proxy2.stop(Unknown Source) at org.gradle.api.internal.tasks.testing.worker.TestWorker$3.run( TestWorker.java:193 ) at org.gradle.api.internal.tasks.testing.worker.TestWorker.executeAndMaintainThreadName( TestWorker.java:129 ) at org.gradle.api.internal.tasks.testing.worker.TestWorker.execute( TestWorker.java:100 ) at org.gradle.api.internal.tasks.testing.worker.TestWorker.execute( TestWorker.java:60 ) at org.gradle.process.internal.worker.child.ActionExecutionWorker.execute( ActionExecutionWorker.java:56 ) at org.gradle.process.internal.worker.child.SystemApplicationClassLoaderWorker.call ( SystemApplicationClassLoaderWorker.java:113 ) at org.gradle.process.internal.worker.child.SystemApplicationClassLoaderWorker.call ( SystemApplicationClassLoaderWorker.java:65 ) at app//worker.org.gradle.process.internal.worker.GradleWorkerMain.run( GradleWorkerMain.java:69 ) at app//worker.org.gradle.process.internal.worker.GradleWorkerMain.main( GradleWorkerMain.java:74 )   이런에러가나서요   package tobyspring.helloboot; import org.junit.jupiter.api.Test; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.boot.test.context.SpringBootTest; import org.springframework.jdbc.core.JdbcTemplate; import static org.assertj.core.api.Assertions. assertThat ; @SpringBootTest(webEnvironment = SpringBootTest.WebEnvironment. NONE ) public class HelloRepositoryTest { @Autowired JdbcTemplate jdbcTemplate; @Autowired HelloRepository helloRepository; @Test void findHelloFailed(){ assertThat (helloRepository.findHello("Toby")).isNull(); } @Test void increaseCount(){ assertThat (helloRepository.countOf("Toby")).isEqualTo(0); helloRepository.increaseCount("Toby"); assertThat (helloRepository.countOf("Toby")).isEqualTo(1); helloRepository.increaseCount("Toby"); assertThat (helloRepository.countOf("Toby")).isEqualTo(2); } } 이건 제 코드입니다 어디서 오류가났는지를 모르겠습니다...

tobyilee · Answer

@SpringBootTest(webEnvironment = SpringBootTest.WebEnvironment.NONE) @Transactional public class HelloRepositoryTest { @Transactional을 빼먹으셨네요. 이게 있어야 테스트에서 변경되는 DB결과가 롤백되어서 다른 테스트에 영향을 주지 않습니다. 이걸 빼먹으면 아래 테스트에서 들어간 데이터가 findHelloFailed() 테스트를 수행할 때까지 남아있어서 원래 기대했던 초기 데이터 상태에서 Toby를 찾을 수 없다는 테스트가 제대로 동작하지 못하는 것입니다.

Hyeok-Cheon Kwon · Answer

저도 같은 오류였는데 감사합니다. 원래는 @HelloBootTest에 있던 Transactional이 없어져서 따로 붙여줘야되는거군요.

tobyilee · Answer

에러 메시지를 보면 null이기를 기대했는데 Hello 오브젝트가 돌아왔다는 거네요. 그렇다면 에러는 assertThat (helloRepository.findHello("Toby")).isNull(); 여기서 발생한 겁니다. 테스트가 실행될 때 Toby라는 데이터가 이미 DB에 들어있었거나, findHello() 구현이 잘못 되어서 null을 리턴해야 하는데 Hello 오브젝트를 넘기도록 되어있을 겁니다. 관련 코드를 살펴보시고, 그래도 해결이 안 되면 전체 소스 코드를 github으로 공유해주시면 받아서 확인해보겠습니다.