title: FEST JUnit-Swing testing noobQ: how to test a main class?
body: <p>Despite reading the tutorial <a href="http://docs.codehaus.org/display/FEST/Getting+Started" rel="nofollow">here</a>, I cant seem to understand how to make FEST work with my application.</p>
  
  <p>I have a Swing application in a big class witht a main method, and a couple of SwingWorker classes. I want to test my application as if I'm running it via the main method. The tutorial only seemed to give instructions on how to test a single component.</p>
  
  <p>Miniature version of my ApplicationWindow.class that contains the main method:</p>
  
  <pre><code>private JFrame frmArtisol;
  private JButton btnBrowseDB;
  public static void main(String[] args) {
      EventQueue.invokeLater(new Runnable() {
          public void run() {
              try {
                  ApplicationWindow window = new ApplicationWindow();
                  window.frmArtisol.setVisible(true);
              } catch (Exception e) {
                  e.printStackTrace();
              }
          }
      });
  }
  
  /**
   * Create the application.
   */
  public ApplicationWindow() {
      initialize();
  
  }
  </code></pre>
  
  <p>And my testclass throwing an error. </p>
  
  <pre><code>public class ApplicationWindowTest {
  private FrameFixture window;
  @Before
  public void setup() throws InitializationError{
      ApplicationWindow applicationWindow = new ApplicationWindow();
      JFrame frame = applicationWindow.getFrmArtisol(); 
      frame = GuiActionRunner.execute(new GuiQuery&lt;JFrame&gt;() {
  
          @Override
          protected JFrame executeInEDT() throws Throwable {
              return new JFrame();
          }
      });
  
      window = new FrameFixture(frame);
      window.show();
  
  }
  
  @Test
  public void test(){
      window.button("btnBrowseDB").click();
  }
  @After
  public void after(){
      window.cleanUp();
  }
  </code></pre>
  
  <p>}</p>
  
  <p>The error thrown when running this test:</p>
  
  <pre><code>  org.fest.swing.exception.ComponentLookupException: Unable to find component using matcher org.fest.swing.core.NameMatcher[name='btnBrowseDB', type=javax.swing.JButton, requireShowing=true].
  
  Component hierarchy:
  javax.swing.JFrame[name='frame0', title='', enabled=true, visible=true, showing=true]
    javax.swing.JRootPane[]
      javax.swing.JPanel[name='null.glassPane']
      javax.swing.JLayeredPane[]
        javax.swing.JPanel[name='null.contentPane']
  
      at org.fest.swing.core.BasicComponentFinder.componentNotFound(BasicComponentFinder.java:271)
      at org.fest.swing.core.BasicComponentFinder.find(BasicComponentFinder.java:260)
      at org.fest.swing.core.BasicComponentFinder.find(BasicComponentFinder.java:254)
      at org.fest.swing.core.BasicComponentFinder.findByName(BasicComponentFinder.java:191)
      at org.fest.swing.fixture.ContainerFixture.findByName(ContainerFixture.java:527)
      at org.fest.swing.fixture.ContainerFixture.button(ContainerFixture.java:124)
      at ApplicationWindowTest.test(ApplicationWindowTest.java:34)
      at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
      at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
      at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
      at java.lang.reflect.Method.invoke(Unknown Source)
      at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:44)
      at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:15)
      at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:41)
      at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:20)
      at org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:28)
      at org.junit.internal.runners.statements.RunAfters.evaluate(RunAfters.java:31)
      at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:76)
      at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:50)
      at org.junit.runners.ParentRunner$3.run(ParentRunner.java:193)
      at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:52)
      at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:191)
      at org.junit.runners.ParentRunner.access$000(ParentRunner.java:42)
      at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:184)
      at org.junit.runners.ParentRunner.run(ParentRunner.java:236)
      at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:49)
      at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)
      at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:467)
      at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:683)
      at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:390)
      at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:197)
  </code></pre>
  
  <p>It seems as if the runner doesn't find my component, and this leads me to believe that I have misunderstood how to test this kind of thing. Any help pointing me in the right direction is greatly appreciated. </p>