Max Max - 11 months ago 52
Java Question

Setting up JUnit with IntelliJ IDEA

Familiar with Java but unfamiliar with IntelliJ, how does one "get started" with JUnit integration?

Inspired by Looking for a tutorial on using JUnit with Intellij IDEA 9.x which didn't answer my questions and was for an older version of IntelliJ.

Answer Source

Basically, you only need junit.jar on the classpath - and here's a quick way to do it:

  1. Make sure you have a source folder (e.g. test) marked as a Test Root.

  2. Create a test, for example like this:

    public class MyClassTest {
        public void testSomething() {
  3. Since you haven't configured junit.jar (yet), the @Test annotation will be marked as an error (red), hit f2 to navigate to it.

  4. Hit alt-enter and choose Add junit.jar to the classpath

There, you're done! Right-click on your test and choose Run 'MyClassTest' to run it and see the test results.

Maven Note: Altervatively, if you're using maven, at step 4 you can instead choose the option Add Maven Dependency..., go to the Search for artifact pane, type junit and take whichever version (e.g. 4.8 or 4.9).