CODEWITHSUNDEEP
junit5
user3199797
user3199797

Reputation: 93

Accessing JUnit version during runtime

Is there a way to access the JUnit5 version during runtime?

E.g.

    ...
    System.out.printf( "JUnit: %s\n",  junit.runner.Version.id() );
    ...

worked fine for JUnit4.

I am looking for the "counterpart" for JUnit5

THANKS :-)

Upvotes: 1

Views: 756

Answers (2)

user3199797
user3199797

Reputation: 93

Thanks for your answer, but I am still having problems. E.g. I can not access ".getVersion()"

Anyway

...
import java.lang.module.ModuleDescriptor;
import java.lang.module.ModuleDescriptor.Version;
import java.util.Optional;

import org.junit.jupiter.api.Test;
import org.junit.platform.runner.JUnitPlatform;
...
String getJupiterVersionFromModuleDescriptor(){
    final Class<Test> clazz = org.junit.jupiter.api.Test.class;
    final Module module = clazz.getModule();
    final ModuleDescriptor moduleDescriptor = module.getDescriptor();
    final Optional<Version> optionalVersion = moduleDescriptor.version();
    final Version version = optionalVersion.get();
    return version.toString();
}

String String getPlatformVersionFromModuleDescriptor(){
    final Class<JUnitPlatform> clazz = org.junit.platform.runner.JUnitPlatform.class;
    final Module module = clazz.getModule();
    final ModuleDescriptor moduleDescriptor = module.getDescriptor();
    final Optional<Version> optionalVersion = moduleDescriptor.version();
    final Version version = optionalVersion.get();
    return version.toString();
}

String getJupiterVersionFromManifest(){
    final Class<Test> clazz = org.junit.jupiter.api.Test.class;
    final Package pakage = clazz.getPackage();
    final String version = pakage.getImplementationVersion();
    return version;
}

String getPlatformVersionFromManifest(){
    final Class<JUnitPlatform> clazz = org.junit.platform.runner.JUnitPlatform.class;
    final Package pakage = clazz.getPackage();
    final String version = pakage.getImplementationVersion();
    return version;
}// delivers null in my case - getPlatformVersionFromModuleDescriptor() reports 1.5.1 on my machine

works and of course:

org.junit.jupiter.api.Test.class.getModule().getDescriptor().version()
org.junit.platform.runner.JUnitPlatform.class.getModule().getDescriptor().version()
org.junit.jupiter.api.Test.class.getPackage().getImplementationVersion()
org.junit.platform.runner.JUnitPlatform.class.getPackage().getImplementationVersion()

works also.

Currently I am using:

String getJupiterVersion(){
    final Class<Test> testClass = org.junit.jupiter.api.Test.class;
    final Optional<Version> optionalVersion = testClass.getModule().getDescriptor().version();
    return optionalVersion.isPresent() ? optionalVersion.get().toString() : testClass.getPackage().getImplementationVersion();
}

String getPlatformVersion(){
    final Class<JUnitPlatform> jUnitPlatformClass = org.junit.platform.runner.JUnitPlatform.class;
    final Optional<Version> optionalVersion = jUnitPlatformClass.getModule().getDescriptor().version();
    return optionalVersion.isPresent() ? optionalVersion.get().toString() : jUnitPlatformClass.getPackage().getImplementationVersion();
}

Further: Get jar version in runtime might be helpful.

Anyway, I am still having problems to access the vintage version. E.g. org.junit.vintage.engine.VintageTestEngine is not accessible ???

And just recently on some machine running JUnit 5.4 getDescriptor() resp. e.g. org.junit.jupiter.api.Test.class.getModule().getDescriptor() delivered null. I like to have a way of identifying the JUnit version that runs on any JUnit 5 installation.

Upvotes: 0

Sormuras
Sormuras

Reputation: 9089

There is no single "JUnit 5" version number.

There are three of them. They are listed on junit.org:

enter image description here

All artifacts of these three groups contain version information packaged

a) into their module descriptor and

b) into their manifest files.

For Jupiter for example, you may use

a) org.junit.jupiter.api.Test.class.getModule().getDescriptor().getVersion()

or b) org.junit.jupiter.api.Test.class.getPackage().getImplementationVersion()

to access Jupiter's version information at runtime.

Upvotes: 3

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