public void testBusRuleAssignment() {
   Net a0 = new Net("a0");
   Net a1 = new Net("a1");
   Bus a = new Bus("a"); // Szyna nie zależy
   a.addNet(a0); //od swojej nazwy,
   a.addNet(a1); //podobnie jak jej test

   NetRule minWidth4 = NetRule.create(MIN_WIDTH, 4);
   a.assignRule(minWidth4);

   assertTrue(a0.assignedRules().contains(minWidth4));
   assertEquals(minWidth4, a0.getRule(MIN_WIDTH));
   assertEquals(minWidth4, a1.getRule(MIN_WIDTH));
}

