How can I tell which specific version of JUnit IntelliJ is using?

Question

I've started working on a large project where the IntelliJ environment has already been set up. The environment includes JUnit, and I can successfully run unit tests. I've seen screens where I can specify the usage of JUnit 3 or JUnit 4, but how can I determine which specific JUnit is being used to run my tests, e.g., JUnit 4.11?

I have already tried "Open Module Settings". When I look at the "Dependencies" tab, I don't see anything relating to JUnit, although I can run JUnit tests.

Answer 1

Which jar is used?

When you run JUnit from IntelliJ, the very first line of the console output displays your classpath. You can use Ctrl+F to find any "junit" references.

junit-rt.jar is a helper library that JetBrains might have written. By opening the jar as an archive with 7-zip, you will find that the only package inside it is under com.intellij

According to Java: Which of multiple resources on classpath JVM takes? the first reference to junit.jar is the one you will use.

---

What version is that jar?

Once you know which jar is being used, there are a number of ways to find the version. One is to use this code taken from https://stackoverflow.com/a/16729507/1405720

import junit.runner.Version;

System.out.println("JUnit version is: " + Version.id());

Another method might be to open up the jar as an archive and see if you can figure it out from there.