JUnit error in LibGDX

Does the test run outside of IntelliJ IDEA using the command line `gradle test`?

It looks like some configuration issue not specific to the IDE. In order to get help you should probably share the project to illustrate the issue: https://stackoverflow.com/help/mcve .

Hi, I'm not sure how to run the test outside of IntelliJ IDEA.

Here is my Entity class, and the basics of my JUnit test:

public class Entity{
    int range;
    public Point position;
    ShapeRenderer shape = new ShapeRenderer();

    public Entity(int range, Point position){
        this.range = range;
        this.position = position;
    }


//The part I'm testing
    public boolean inRange(Entity target){
        if(abs(target.position.x - this.position.x) < this.range &&
                abs(target.position.y - this.position.y) < this.range){
            return true;
        }
        return false;
    }


    public void drawBox(ArrayList<Entity> target, OrthographicCamera camera, Sprite sprite) {
    //Draws a box (and needs the camera to do so)
    }
}

 import com.kroy.entities.Entity;
 import com.kroy.game.Point;
 import org.junit.jupiter.api.Test;
 import org.junit.jupiter.api.Assertions;

class EntityTest {

@Test
    public void testInRangeBoundary() {
        Entity e = new Entity(5, new Point(5,5));
        Assertions.assertTrue(e.inRange(new Entity(0,new Point(9,0))));
    }
}

./gradlew test

I'm still not really sure how to do that, I get this error when I try: Cannot find System Java Compiler. Ensure that you have installed a JDK (not just a JRE) and configured your JAVA_HOME system variable to point to the according directory.

I agree that it's probably not related to IntelliJ but I still don't know how to solve it, any help would be much appreciated.

You need to configure JDK properly as described in the error message.

For the help with IntelliJ IDEA configuration you need to share the project using some file sharing service or GitHub. See https://stackoverflow.com/help/mcve for the details what exactly to share.