public void testRangeMarkersAreLazyCreated() throws Exception {
    final Document document = EditorFactory.getInstance().createDocument("[xxxxxxxxxxxxxx]");
    RangeMarker m1 = document.createRangeMarker(2, 4);
    RangeMarker m2 = document.createRangeMarker(2, 4);

    assertEquals(2, ((DocumentImpl) document).getRangeMarkersSize());
    assertEquals(1, ((DocumentImpl) document).getRangeMarkersNodeSize());

    RangeMarker m3 = document.createRangeMarker(2, 5);
    assertEquals(2, ((DocumentImpl) document).getRangeMarkersNodeSize());
    document.deleteString(4, 5);
    assertTrue(m1.isValid());
    assertTrue(m2.isValid());
    assertTrue(m3.isValid());
    assertEquals(1, ((DocumentImpl) document).getRangeMarkersNodeSize());

    m1.setGreedyToLeft(true);
    assertTrue(m1.isValid());
    assertEquals(3, ((DocumentImpl) document).getRangeMarkersSize());
    assertEquals(2, ((DocumentImpl) document).getRangeMarkersNodeSize());

    m3.dispose();
    assertTrue(m1.isValid());
    assertTrue(m2.isValid());
    assertFalse(m3.isValid());
    assertEquals(2, ((DocumentImpl) document).getRangeMarkersSize());
    assertEquals(2, ((DocumentImpl) document).getRangeMarkersNodeSize());
  }
  public void testInsertIntoStartExpandToLeft() throws Exception {
    RangeMarker marker = createMarker("0123456789", 2, 5);

    marker.setGreedyToLeft(true);

    marker.getDocument().insertString(2, "xxx");

    assertEquals(2, marker.getStartOffset());
    assertEquals(8, marker.getEndOffset());
    assertTrue(marker.isValid());
  }