java.lang.NoClassDefFoundError: org/junit/platform/commons/PreconditionViolationException when trying run junit5 test with maven

Question

When trying to run tests using command mvn test I receive an error:

[ERROR] There was an error in the forked process
[ERROR] java.lang.NoClassDefFou         


        

Answer 1

In my case the problem disappeared after deleting my local maven repository. Don't know what library caused this strange behaviour, but now everything is working fine!

Answer 2

java.lang.NoClassDefFoundError: org/junit/platform/commons/PreconditionViolationException when trying run junit5 test with maven

This error can be come due to the version mismatch of junit-plateform-engine junit-jupiter-params and junit-platform-runner and also other respective dependencies.

So for the resolution of this issue you do not need to define version like 1.5.3 ...etc

you can define version as follows :

<dependencies>
<!--need to add for parameterized test -->
    <dependency>
        <groupId>org.junit.jupiter</groupId>
        <artifactId>junit-jupiter-params</artifactId>
        **<version>${junit.jupiter.version}</version>**
        <scope>test</scope>
    </dependency>
    <dependency>
        <groupId>org.junit.jupiter</groupId>
        <artifactId>junit-jupiter-engine</artifactId>
        **<version>${junit.jupiter.version}</version>**
        <scope>test</scope>
    </dependency>
    <dependency>
        <groupId>org.junit.platform</groupId>
        <artifactId>junit-platform-runner</artifactId>
        **<version>${junit.platform.version}</version>**
        <scope>test</scope>
    </dependency>
</dependencies>

So through this compatible version jar will be added in your project and project will run successfully

Answer 3

adding following dependency helped in my case

 <dependency>
            <groupId>org.junit.platform</groupId>
            <artifactId>junit-platform-commons</artifactId>
            <version>1.5.2</version>
 </dependency>

Answer 4

I got the same problem with Gradle build and I got my issue resolved using the JUnit Bill of Materials(BOM), which will take care of Junit's direct and transitive dependencies version.

dependencyManagement {
    imports {
        mavenBom "org.junit:junit-bom:5.5.2"
    }
}
dependencies {
...
    testCompile('org.junit.jupiter:junit-jupiter-api')
    testRuntime('org.junit.jupiter:junit-jupiter-engine')
    testCompile('org.junit.jupiter:junit-jupiter-params')
    testCompile('org.junit.platform:junit-platform-launcher')
    testCompile('org.junit.platform:junit-platform-runner')
}

NOTE: I have not specified the version because the Junit BOM will take care of the Junit dependencies' version management role.

Answer 5

As others suggested, using JUnit 5.5.2 version is the way to go here. There are different alternatives to achieve this:

1. If you're using spring-boot-starter-parent, you can upgrade it to 2.2.0.RELEASE
2. If you use spring-boot-starter-parent (or spring-boot-dependencies), you can define a property to update just JUnit: <junit-jupiter.version>5.5.2</junit-jupiter.version>
3. If you're having this issue just in Eclipse, you can update it and add the JUnit 5 library to the Java Build Path (Project > Java Build Path > Libraries > Add Library > JUnit > JUnit 5 > Finish)
4. You can add the Junit BOM, using 5.5.2 version (see Prasanth Rajendran or Ramit answer)

Answer 6

Remove junit-platform-launcher, junit-jupiter-engine and junit-jupiter-api.

Add junit-jupiter. (junit-jupiter is aggregator)

Sources:

• https://github.com/junit-team/junit5/issues/1773
• It worked for me.