@Test
public void emptyCollection() {

    final Bounds b = helper.getBounds( Collections.<GuidedDecisionTableView.Presenter>emptySet() );
    assertEquals( BOUNDS_MIN_X,
                  b.getX(),
                  0.0 );
    assertEquals( BOUNDS_MIN_Y,
                  b.getY(),
                  0.0 );
    assertEquals( BOUNDS_MAX_X - BOUNDS_MIN_X,
                  b.getWidth(),
                  0.0 );
    assertEquals( BOUNDS_MAX_Y - BOUNDS_MIN_Y,
                  b.getHeight(),
                  0.0 );
}