Basic JUnit test for JavaFX 8

Question

I want to create basic JUnit test for JavaFX 8 application. I have this simple code sample:

public class Main extends Application {
    public static void ma         


        

Answer 1

I use a Junit Rule to run unit tests on the JavaFX thread. The details are in this post. Just copy the class from that post and then add this field to your unit tests.

@Rule public JavaFXThreadingRule javafxRule = new JavaFXThreadingRule();

This code works for both JavaFX 2 and JavaFX 8.

Answer 2

Based on Brian Blonski 's answer I created a JUnit-Testrunner, that does essentially the same thing, but is a bit simpler to use in my opinion. Using it, your test would look like this:

@RunWith( JfxTestRunner.class )
public class MyUnitTest
{
  @Test
  public void testMyMethod()
  {
   //...
  }
}

Answer 3

The easiest aproach is the following:

import javafx.application.Platform;
import javafx.embed.swing.JFXPanel;
import javafx.stage.Stage;

import org.junit.Test;

public class BasicStart {

    @Test
    public void testA() throws InterruptedException {
        Thread thread = new Thread(new Runnable() {

            @Override
            public void run() {
                new JFXPanel(); // Initializes the JavaFx Platform
                Platform.runLater(new Runnable() {

                    @Override
                    public void run() {
                        new Main().start(new Stage()); // Create and
                                                        // initialize
                                                        // your app.

                    }
                });
            }
        });
        thread.start();// Initialize the thread
        Thread.sleep(10000); // Time to use the app, with out this, the thread
                                // will be killed before you can tell.
    }

}

Hope it helps!