private void assertTitle(String expectedTitle, RootPaneContainer container) {
    JTextField source = new JTextField();
    container.getContentPane().add(source);

    assertContext.setGuiComponent(GuiComponentFactory.newGuiComponent(source));

    assertFrame.execute();

    Statement resultAssert = assertContext.getPostedAssert();
    assertNotNull("un assertion est défini", resultAssert);
    assertEquals("<assertFrame title=\"" + expectedTitle + "\"/>", resultAssert.toXml());
  }
  public void test_assert_exists() throws Exception {
    JTree source = buildJTree(new TreePath(new Object[] {"root", "child"}), "treeName");

    context.setGuiComponent(GuiComponentFactory.newGuiComponent(source));
    context.setPoint(new Point(1, 1));

    assertTree.execute();

    Statement resultAssert = context.getPostedAssert();
    assertNotNull("un assertion est défini", resultAssert);
    assertEquals(
        "<assertTree name=\"treeName\" path=\"root:child\" exists=\"true\"/>",
        resultAssert.toXml());
  }