Eclipse No tests found using JUnit 5 caused by NoClassDefFoundError for LauncherFactory

Question

The problem

Whenever I run my projects JUnit test (using JUnit 5 with Java 9 and Eclipse Oxygen 1.a) I encounter the problem that eclipse can\'t find any tests.

Answer 1

Answers so far did not adress the problem of sharing code with other people who don't necessarily use Eclipse. Here is one proposition. The key is to use a maven profile to solve the Eclipse Case.

It assumes you have defined a property junit5.version in your pom like:

    UTF-8
    5.1.1

then in the profiles section add the following:

    
        eclipse
        
            
                org.junit.jupiter
                junit-jupiter-engine
            
            
                org.junit.platform
                junit-platform-launcher
            
        
        
            
                
                    org.junit.jupiter
                    junit-jupiter-engine
                    ${junit5.version}
                    test
                
                
                    org.junit.platform
                    junit-platform-launcher
                    1.1.1
                    test
                
            
        
    

All you have to do after this is to select the profile in your local Eclipse: Right click on your project and select Maven > Select Maven Profiles... (or hit Ctrl + Alt + P), and then check the "eclipse" profile we just created.

With that you are done. Your Eclipse will run Junit 5 tests as expected, but the configuration you added won't pollute other builds or other IDE