/** Tests if the popup is on the screen. */
public static void isPopupOnScreen(JPopupMenu popup, Rectangle checkBounds) {
Dimension dim = popup.getSize();
Point pt = new Point();
SwingUtilities.convertPointToScreen(pt, popup);
Rectangle bounds = new Rectangle(pt, dim);
if (!SwingUtilities.isRectangleContainingRectangle(checkBounds, bounds)) {
throw new RuntimeException("We do not match! " + checkBounds + " / " + bounds);
}
}
