public class JavaApp extends FestSwingTestCaseTemplate {



  public static void main(String[] args)
  {
    FailOnThreadViolationRepaintManager.install();
        HTMLDocumentEditor frame = GuiActionRunner.execute(new GuiQuery<HTMLDocumentEditor>() {
        protected HTMLDocumentEditor executeInEDT() {
        return new HTMLDocumentEditor();
        }
    });

    FrameFixture window = new FrameFixture(frame);
    window.show(); // shows the frame to test
    ApplicationLauncher.application(HTMLDocumentEditor.class);
    window.menuItemWithPath("File", "Open").click();
    JavaApp app = new JavaApp();
    app.testFile();


  }

  public void testFile()
  {
    JFileChooserFixture fileChooser = JFileChooserFinder.findFileChooser().using(robot());
    fileChooser.setCurrentDirectory(Files.temporaryFolder()).selectFile(new File("htmleditor.html")).approve();
  }


Exception in thread "main" java.lang.NullPointerException
        at org.fest.swing.finder.ComponentFinderTemplate.findComponentWith(ComponentFinderTemplate.java:88)
        at org.fest.swing.finder.JFileChooserFinder.using(JFileChooserFinder.java:122)
        at org.fest.demo.JavaApp.testFile(JavaApp.java:63)
        at org.fest.demo.JavaApp.main(JavaApp.java:56)

    }