public function testDeepOverriddenRoute() {
$collection = new RouteCollection();
$collection
->add('foo', new Route('/foo'));
$collection1 = new RouteCollection();
$collection1
->add('foo', new Route('/foo1'));
$collection2 = new RouteCollection();
$collection2
->add('foo', new Route('/foo2'));
$collection1
->addCollection($collection2);
$collection
->addCollection($collection1);
$this
->assertEquals('/foo2', $collection1
->get('foo')
->getPattern());
$this
->assertEquals('/foo2', $collection
->get('foo')
->getPattern());
}