public void testPackages() {
    assertEquals("nb packages", 3, factory.getPackages().size());

    Node node;

    node = factory.getPackages().get("");
    assertNotNull("default package missing", node);
    assertTrue("default package not concrete", node.isConfirmed());

    node = factory.getPackages().get("java.io");
    assertNotNull("package java.io missing", node);
    assertFalse("package java.io is concrete", node.isConfirmed());

    node = factory.getPackages().get("java.util");
    assertNotNull("package java.util missing", node);
    assertFalse("package java.util is concrete", node.isConfirmed());
  }