/**
  * Test method for the <tt>getWP()</tt> and <tt>setWP($wP)</tt> functions.
  */
 public function testGetSetWP()
 {
     $notification = new Notification();
     $this->assertNull($notification->getWP());
     $wP = new WP();
     $this->assertSame($notification, $notification->setWP($wP));
     $this->assertSame($wP, $notification->getWP());
 }