870N/A @summary verifies that MouseEvent could be constructed correctly for mouse extra buttons in regard to sun.awt.enableExtraMouseButtons property
870N/A * verify that user can create the MouseEvent? with button1|2|3|4|5|... when property "sun.awt.enableExtraMouseButtons" is true by default
870N/A System.out.println("sun.awt.enableExtraMouseButtons = "+Toolkit.getDefaultToolkit().getDesktopProperty("sun.awt.enableExtraMouseButtons"));
870N/A int numberOfButtons;