My build.gradle has:
testCompile 'org.junit.jupiter:junit-jupiter-api:5.0.0' Using the standard example from http://junit.org/junit5/docs/current/user-guide/
import static org.junit.jupiter.api.Assertions.assertEquals; import org.junit.jupiter.api.Test; class FirstJUnit5Tests { @Test void myFirstTest() { assertEquals(2, 1 + 1); } } When I try to run as a JUnit test in IntelliJ 2017.2.3, I get:
objc[32347]: Class JavaLaunchHelper is implemented in both /Library/Java/JavaVirtualMachines/jdk1.8.0_144.jdk/Contents/Home/bin/java (0x10f5be4c0) and /Library/Java/JavaVirtualMachines/jdk1.8.0_144.jdk/Contents/Home/jre/lib/libinstrument.dylib (0x10f6864e0). One of the two will be used. Which one is undefined. Sep 11, 2017 12:39:04 PM org.junit.platform.launcher.core.DefaultLauncher handleThrowable WARNING: TestEngine with ID 'junit-jupiter' failed to discover tests java.lang.NoSuchMethodError: org.junit.platform.commons.util.ClassUtils.isKotlinClass(Ljava/lang/Class;)Z at org.junit.jupiter.engine.descriptor.ClassTestDescriptor.lambda$getTestInstanceLifecycle$14(ClassTestDescriptor.java:299) at java.util.Optional.orElseGet(Optional.java:267) at org.junit.jupiter.engine.descriptor.ClassTestDescriptor.getTestInstanceLifecycle(ClassTestDescriptor.java:299) at org.junit.jupiter.engine.descriptor.ClassTestDescriptor.<init>(ClassTestDescriptor.java:87) at org.junit.jupiter.engine.descriptor.ClassTestDescriptor.<init>(ClassTestDescriptor.java:77) at org.junit.jupiter.engine.discovery.TestContainerResolver.resolveClass(TestContainerResolver.java:100) at org.junit.jupiter.engine.discovery.TestContainerResolver.resolveElement(TestContainerResolver.java:45) at org.junit.jupiter.engine.discovery.JavaElementsResolver.tryToResolveWithResolver(JavaElementsResolver.java:169) at org.junit.jupiter.engine.discovery.JavaElementsResolver.lambda$resolve$8(JavaElementsResolver.java:156) at java.util.stream.ReferencePipeline$3$1.accept(ReferencePipeline.java:193) at java.util.Iterator.forEachRemaining(Iterator.java:116) at java.util.Spliterators$IteratorSpliterator.forEachRemaining(Spliterators.java:1801) at java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:481) at java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:471) at java.util.stream.ReduceOps$ReduceOp.evaluateSequential(ReduceOps.java:708) at java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.util.stream.ReferencePipeline.collect(ReferencePipeline.java:499) at org.junit.jupiter.engine.discovery.JavaElementsResolver.resolve(JavaElementsResolver.java:159) at org.junit.jupiter.engine.discovery.JavaElementsResolver.lambda$resolveForAllParents$4(JavaElementsResolver.java:130) at java.util.Collections$SingletonSet.forEach(Collections.java:4767) at org.junit.jupiter.engine.discovery.JavaElementsResolver.resolveForAllParents(JavaElementsResolver.java:130) at org.junit.jupiter.engine.discovery.JavaElementsResolver.resolveContainerWithParents(JavaElementsResolver.java:80) at org.junit.jupiter.engine.discovery.JavaElementsResolver.resolveClass(JavaElementsResolver.java:55) at org.junit.jupiter.engine.discovery.DiscoverySelectorResolver.lambda$resolveSelectors$2(DiscoverySelectorResolver.java:59) at java.util.ArrayList.forEach(ArrayList.java:1249) at org.junit.jupiter.engine.discovery.DiscoverySelectorResolver.resolveSelectors(DiscoverySelectorResolver.java:58) at org.junit.jupiter.engine.JupiterTestEngine.resolveDiscoveryRequest(JupiterTestEngine.java:68) at org.junit.jupiter.engine.JupiterTestEngine.discover(JupiterTestEngine.java:61) at org.junit.platform.launcher.core.DefaultLauncher.discoverEngineRoot(DefaultLauncher.java:130) at org.junit.platform.launcher.core.DefaultLauncher.discoverRoot(DefaultLauncher.java:117) at org.junit.platform.launcher.core.DefaultLauncher.discover(DefaultLauncher.java:82) at com.intellij.junit5.JUnit5IdeaTestRunner.startRunnerWithArgs(JUnit5IdeaTestRunner.java:48) at com.intellij.rt.execution.junit.IdeaTestRunner$Repeater.startRunnerWithArgs(IdeaTestRunner.java:47) at com.intellij.rt.execution.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:242) at com.intellij.rt.execution.junit.JUnitStarter.main(JUnitStarter.java:70) Sep 11, 2017 12:39:04 PM org.junit.platform.launcher.core.DefaultLauncher handleThrowable WARNING: TestEngine with ID 'junit-jupiter' failed to discover tests java.lang.NoSuchMethodError: org.junit.platform.commons.util.ClassUtils.isKotlinClass(Ljava/lang/Class;)Z at org.junit.jupiter.engine.descriptor.ClassTestDescriptor.lambda$getTestInstanceLifecycle$14(ClassTestDescriptor.java:299) at java.util.Optional.orElseGet(Optional.java:267) at org.junit.jupiter.engine.descriptor.ClassTestDescriptor.getTestInstanceLifecycle(ClassTestDescriptor.java:299) at org.junit.jupiter.engine.descriptor.ClassTestDescriptor.<init>(ClassTestDescriptor.java:87) at org.junit.jupiter.engine.descriptor.ClassTestDescriptor.<init>(ClassTestDescriptor.java:77) at org.junit.jupiter.engine.discovery.TestContainerResolver.resolveClass(TestContainerResolver.java:100) at org.junit.jupiter.engine.discovery.TestContainerResolver.resolveElement(TestContainerResolver.java:45) at org.junit.jupiter.engine.discovery.JavaElementsResolver.tryToResolveWithResolver(JavaElementsResolver.java:169) at org.junit.jupiter.engine.discovery.JavaElementsResolver.lambda$resolve$8(JavaElementsResolver.java:156) at java.util.stream.ReferencePipeline$3$1.accept(ReferencePipeline.java:193) at java.util.Iterator.forEachRemaining(Iterator.java:116) at java.util.Spliterators$IteratorSpliterator.forEachRemaining(Spliterators.java:1801) at java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:481) at java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:471) at java.util.stream.ReduceOps$ReduceOp.evaluateSequential(ReduceOps.java:708) at java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.util.stream.ReferencePipeline.collect(ReferencePipeline.java:499) at org.junit.jupiter.engine.discovery.JavaElementsResolver.resolve(JavaElementsResolver.java:159) at org.junit.jupiter.engine.discovery.JavaElementsResolver.lambda$resolveForAllParents$4(JavaElementsResolver.java:130) at java.util.Collections$SingletonSet.forEach(Collections.java:4767) at org.junit.jupiter.engine.discovery.JavaElementsResolver.resolveForAllParents(JavaElementsResolver.java:130) at org.junit.jupiter.engine.discovery.JavaElementsResolver.resolveContainerWithParents(JavaElementsResolver.java:80) at org.junit.jupiter.engine.discovery.JavaElementsResolver.resolveClass(JavaElementsResolver.java:55) at org.junit.jupiter.engine.discovery.DiscoverySelectorResolver.lambda$resolveSelectors$2(DiscoverySelectorResolver.java:59) at java.util.ArrayList.forEach(ArrayList.java:1249) at org.junit.jupiter.engine.discovery.DiscoverySelectorResolver.resolveSelectors(DiscoverySelectorResolver.java:58) at org.junit.jupiter.engine.JupiterTestEngine.resolveDiscoveryRequest(JupiterTestEngine.java:68) at org.junit.jupiter.engine.JupiterTestEngine.discover(JupiterTestEngine.java:61) at org.junit.platform.launcher.core.DefaultLauncher.discoverEngineRoot(DefaultLauncher.java:130) at org.junit.platform.launcher.core.DefaultLauncher.discoverRoot(DefaultLauncher.java:117) at org.junit.platform.launcher.core.DefaultLauncher.execute(DefaultLauncher.java:90) at com.intellij.junit5.JUnit5IdeaTestRunner.startRunnerWithArgs(JUnit5IdeaTestRunner.java:62) at com.intellij.rt.execution.junit.IdeaTestRunner$Repeater.startRunnerWithArgs(IdeaTestRunner.java:47) at com.intellij.rt.execution.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:242) at com.intellij.rt.execution.junit.JUnitStarter.main(JUnitStarter.java:70) Process finished with exit code 0 Empty test suite. I'm not using Kotlin at all, so I find those warnings + stack traces odd. Secondly, it isn't running the test. Any ideas?