public void testIllegalOccur(){
  Random random=random();
  expectThrows(IllegalArgumentException.class,null);
  expectThrows(IllegalArgumentException.class,null);
}

public void testIllegalOccur ( ) { Random random = random ( ) ; expectThrows ( IllegalArgumentException . class , null ) ; expectThrows ( IllegalArgumentException . class , null ) ; }
must_not is not supported
