ClassNotFoundException trying to run JUnit tests using Maven in IntelliJ

Question

I'm working on a Kotlin project in IntelliJ with basic JUnit5 tests, using Maven to manage dependencies. I've been executing the JUnit tests successfully through the IntelliJ Run 'ClassName' command.

Earlier today I tried to start grouping my tests into test suites, and I added junit-platform-runner and junit-platform-commons as dependencies in my pom.xml. Since then, I have been getting the following ClassNotFoundException every time I try to execute any tests.

Exception in thread "main" java.lang.NoClassDefFoundError: org/junit/platform/commons/util/ClassNamePatternFilterUtils
    at org.junit.platform.launcher.core.LauncherFactory.loadAndFilterTestExecutionListeners(LauncherFactory.java:122)
    at org.junit.platform.launcher.core.LauncherFactory.create(LauncherFactory.java:108)
    at org.junit.platform.launcher.core.LauncherFactory.create(LauncherFactory.java:75)
    at com.intellij.junit5.JUnit5IdeaTestRunner.createListeners(JUnit5IdeaTestRunner.java:48)
    at com.intellij.rt.junit.IdeaTestRunner$Repeater.startRunnerWithArgs(IdeaTestRunner.java:31)
    at com.intellij.rt.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:220)
    at com.intellij.rt.junit.JUnitStarter.main(JUnitStarter.java:53)
    at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.base/java.lang.reflect.Method.invoke(Method.java:564)
    at com.intellij.rt.execution.application.AppMainV2.main(AppMainV2.java:128)
Caused by: java.lang.ClassNotFoundException: org.junit.platform.commons.util.ClassNamePatternFilterUtils
    at java.base/jdk.internal.loader.BuiltinClassLoader.loadClass(BuiltinClassLoader.java:602)
    at java.base/jdk.internal.loader.ClassLoaders$AppClassLoader.loadClass(ClassLoaders.java:178)
    at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:522)
    ... 12 more

I've removed the two new dependencies from my pom.xml, ran mvn clean install, and ran mvn dependency:purge-local-repository, but I'm still having the same issue. The contents of my pom.xml are pasted below.

<?xml version="1.0" encoding="UTF-8"?>

<project xmlns="http://maven.apache.org/POM/4.0.0"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>

    <groupId>com.millibyte1</groupId>
    <artifactId>cubesearch</artifactId>
    <version>1.0-SNAPSHOT</version>
    <packaging>jar</packaging>

    <properties>
        <java.version>1.14</java.version>
        <kotlin.version>1.3.72</kotlin.version>
    </properties>

    <dependencies>

        <dependency>
            <groupId>org.jetbrains.kotlin</groupId>
            <artifactId>kotlin-stdlib-jdk8</artifactId>
            <version>${kotlin.version}</version>
        </dependency>

        <dependency>
            <groupId>org.junit.jupiter</groupId>
            <artifactId>junit-jupiter</artifactId>
            <version>5.6.0</version>
            <scope>test</scope>
        </dependency>
        <!--<dependency>
            <groupId>org.junit.platform</groupId>
            <artifactId>junit-platform-runner</artifactId>
            <version>1.7.0</version>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>org.junit.platform</groupId>
            <artifactId>junit-platform-commons</artifactId>
            <version>1.7.0</version>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>org.junit</groupId>
            <artifactId>junit-bom</artifactId>
            <version>5.7.0-M1</version>
            <type>pom</type>
        </dependency>-->
    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-compiler-plugin</artifactId>
                <version>3.1</version>
                <configuration>
                    <source>${java.version}</source>
                    <target>${java.version}</target>
                </configuration>
                <executions>
                    <execution>
                        <id>default-compile</id>
                        <phase>none</phase>
                    </execution>
                    <execution>
                        <id>default-testCompile</id>
                        <phase>none</phase>
                    </execution>
                    <execution>
                        <id>java-compile</id>
                        <phase>compile</phase>
                        <goals>
                            <goal>compile</goal>
                        </goals>
                    </execution>
                    <execution>
                        <id>java-test-compile</id>
                        <phase>test-compile</phase>
                        <goals>
                            <goal>testCompile</goal>
                        </goals>
                    </execution>
                </executions>
            </plugin>
            <plugin>
                <artifactId>kotlin-maven-plugin</artifactId>
                <groupId>org.jetbrains.kotlin</groupId>
                <version>${kotlin.version}</version>
                <executions>
                    <execution>
                        <id>compile</id>
                        <goals>
                            <goal>compile</goal>
                        </goals>
                        <configuration>
                            <sourceDirs>
                                <sourceDir>${project.basedir}/src/main/kotlin</sourceDir>
                                <sourceDir>${project.basedir}/src/main/java</sourceDir>
                            </sourceDirs>
                        </configuration>
                    </execution>
                    <execution>
                        <id>test-compile</id>
                        <goals>
                            <goal>test-compile</goal>
                        </goals>
                        <configuration>
                            <sourceDirs>
                                <sourceDir>${project.basedir}/src/test/kotlin</sourceDir>
                                <sourceDir>${project.basedir}/src/test/java</sourceDir>
                            </sourceDirs>
                        </configuration>
                    </execution>
                </executions>
            </plugin>
        </plugins>
    </build>

</project>ClassNotFoundException trying to run JUnit tests using Maven in IntelliJ - Stack Overflow

Any help is appreciated, thanks in advance!

Answer 1

Deleting my /home/username/.m2 directory and rerunning mvn clean install solved this. I'm not sure why mvn dependency:purge-local-repository didn't.