My tests in Spring project work well until I did something and in my WebMvcTest, MockMvc started simply to be null. In Service tests where I need to mock my repository this exception is thrown:
java.lang.NoClassDefFoundError: org/mockito/session/MockitoSessionLogger
at (Native Method) at (Class.java:3215) at (Class.java:3420) at (Class.java:2631) at org.junit.platform.commons.util.ReflectionUtils.newInstance(ReflectionUtils.java:475) at org.junit.jupiter.engine.extension.MutableExtensionRegistry.registerExtension(MutableExtensionRegistry.java:182) at (ArrayList.java:1510) at org.junit.jupiter.engine.extension.MutableExtensionRegistry.createRegistryFrom(MutableExtensionRegistry.java:123) at org.junit.jupiter.engine.descriptor.ExtensionUtils.populateNewExtensionRegistryFromExtendWithAnnotation(ExtensionUtils.java:77) at org.junit.jupiter.engine.descriptor.ClassBasedTestDescriptor.prepare(ClassBasedTestDescriptor.java:142) at org.junit.jupiter.engine.descriptor.ClassBasedTestDescriptor.prepare(ClassBasedTestDescriptor.java:77) at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$prepare$1(NodeTestTask.java:107) at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73) at org.junit.platform.engine.support.hierarchical.NodeTestTask.prepare(NodeTestTask.java:107) at org.junit.platform.engine.support.hierarchical.NodeTestTask.execute(NodeTestTask.java:75) at (ArrayList.java:1510) at org.junit.platform.engine.support.hierarchical.SameThreadHierarchicalTestExecutorService.invokeAll(SameThreadHierarchicalTestExecutorService.java:38) at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$5(NodeTestTask.java:139) at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73) at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$7(NodeTestTask.java:125) at org.junit.platform.engine.support.hierarchical.Node.around(Node.java:135) at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$8(NodeTestTask.java:123) at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73) at org.junit.platform.engine.support.hierarchical.NodeTestTask.executeRecursively(NodeTestTask.java:122) at org.junit.platform.engine.support.hierarchical.NodeTestTask.execute(NodeTestTask.java:80) at org.junit.platform.engine.support.hierarchical.SameThreadHierarchicalTestExecutorService.submit(SameThreadHierarchicalTestExecutorService.java:32) at org.junit.platform.engine.support.hierarchical.HierarchicalTestExecutor.execute(HierarchicalTestExecutor.java:57) at org.junit.platform.engine.support.hierarchical.HierarchicalTestEngine.execute(HierarchicalTestEngine.java:51) at org.junit.platform.launcher.core.DefaultLauncher.execute(DefaultLauncher.java:229) at org.junit.platform.launcher.core.DefaultLauncher.lambda$execute$6(DefaultLauncher.java:197) at org.junit.platform.launcher.core.DefaultLauncher.withInterceptedStreams(DefaultLauncher.java:211) at org.junit.platform.launcher.core.DefaultLauncher.execute(DefaultLauncher.java:191) at org.junit.platform.launcher.core.DefaultLauncher.execute(DefaultLauncher.java:128) at com.intellij.junit5.JUnit5IdeaTestRunner.startRunnerWithArgs(JUnit5IdeaTestRunner.java:69) at com.intellij.rt.junit.IdeaTestRunner$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: java.lang.ClassNotFoundException: org.mockito.session.MockitoSessionLogger at (BuiltinClassLoader.java:602) at (ClassLoaders.java:178) at (ClassLoader.java:522) ... 37 more2 Answers
Need to check your dependencies, if this mockito-all is including in the test resources.
I recommend to add the mockito-core dependency ().
<dependency> <groupId>org.mockito</groupId> <artifactId>mockito-core</artifactId> <version>3.7.0</version> <scope>test</scope>
</dependency>The mockito-all dependency mentioned in another answer was last updated in 2015.
