public void testHit() {
   Pacman p1 = new Pacman(0, 0);
   CaseTrappe c = new CaseTrappe(0, 0, 'a');
   assertEquals(true, c.hit(p1));
   Pacman p2 = new Pacman(0, 0);
   p2.deplacerDroite();
   assertEquals(false, c.hit(p2));
 }