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intellij-ideajunit5

java.lang.NoClassDefFoundError: org/junit/platform/launcher/TestExecutionListener

I am trying to create a test class (JUnit 5) using Intellij Idea but I get the bellow error. When I created the test class it did NOT show the fix button so I am pretty sure the library is in class path.

Exception in thread "main" java.lang.NoClassDefFoundError: org/junit/platform/launcher/TestExecutionListener
    at java.base/java.lang.ClassLoader.defineClass1(Native Method)
    at java.base/java.lang.ClassLoader.defineClass(ClassLoader.java:1016)
    at java.base/java.security.SecureClassLoader.defineClass(SecureClassLoader.java:151)
    at java.base/jdk.internal.loader.BuiltinClassLoader.defineClass(BuiltinClassLoader.java:802)
    at java.base/jdk.internal.loader.BuiltinClassLoader.findClassOnClassPathOrNull(BuiltinClassLoader.java:700)
    at java.base/jdk.internal.loader.BuiltinClassLoader.loadClassOrNull(BuiltinClassLoader.java:623)
    at java.base/jdk.internal.loader.BuiltinClassLoader.loadClass(BuiltinClassLoader.java:581)
    at java.base/jdk.internal.loader.ClassLoaders$AppClassLoader.loadClass(ClassLoaders.java:178)
    at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:521)
    at com.intellij.junit5.JUnit5IdeaTestRunner.createListeners(JUnit5IdeaTestRunner.java:39)
    at com.intellij.rt.execution.junit.IdeaTestRunner$Repeater.startRunnerWithArgs(IdeaTestRunner.java:45)
    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.junit.platform.launcher.TestExecutionListener
    at java.base/jdk.internal.loader.BuiltinClassLoader.loadClass(BuiltinClassLoader.java:583)
    at java.base/jdk.internal.loader.ClassLoaders$AppClassLoader.loadClass(ClassLoaders.java:178)
    at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:521)
    ... 13 more

My build.gradle looks as below:

plugins {
    id 'java'
    id 'application'
    id 'org.openjfx.javafxplugin' version '0.0.7'
}

group 'ict221'
version '1.0-SNAPSHOT'
sourceCompatibility = 1.11
mainClassName = 'boardgame.gui.RunGame'

repositories {
    mavenCentral()
}

test {
    useJUnitPlatform()
}

dependencies {
    testImplementation 'org.junit.jupiter:junit-jupiter-api:5.3.1'
    testRuntimeOnly 'org.junit.jupiter:junit-jupiter-engine:5.3.1'
}

javafx {
    modules = [ 'javafx.controls', 'javafx.fxml' ]
    version = "11.0.2"
}

Any help is much appreciate it.

Solution

  • As mentionned by @CrazyCode in comments, with Intellij you need to specify the version of JUnit (because Intellij is bundled with old version of JUnit)

    Add this : 

    dependencies {
    ...
    testRuntimeOnly("org.junit.platform:junit-platform-launcher:1.6.1")
    testRuntimeOnly("org.junit.jupiter:junit-jupiter-engine:5.6.1")
    testRuntimeOnly("org.junit.vintage:junit-vintage-engine:5.6.1")
}