@Test
public void testEdit() throws Exception {

  JTable table = ( (SwingTree) tree ).getTable();
  // Edit calls return false if there's a cell editor failure
  assertTrue( table.editCellAt( 0, 0 ) );
  assertTrue( table.editCellAt( 0, 3 ) );
  assertTrue( table.editCellAt( 0, 4 ) );
}