class PathRootsSubscriberTest

class PathRootsSubscriberTest extends UnitTestCase {
    
    /**
     * The mocked state.
     *
     * @var \Drupal\Core\State\StateInterface|\PHPUnit\Framework\MockObject\MockObject
     */
    protected $state;
    
    /**
     * The tested path root subscriber.
     *
     * @var \Drupal\Core\EventSubscriber\PathRootsSubscriber
     */
    protected $pathRootsSubscriber;
    
    /**
     * {@inheritdoc}
     */
    protected function setUp() : void {
        $this->state = $this->createMock('Drupal\\Core\\State\\StateInterface');
        $this->pathRootsSubscriber = new PathRootsSubscriber($this->state);
    }
    
    /**
     * Tests altering and finished event.
     *
     * @covers ::onRouteAlter
     * @covers ::onRouteFinished
     */
    public function testSubscribing() {
        // Ensure that onRouteFinished can be called without throwing notices
        // when no path roots got set.
        $this->pathRootsSubscriber
            ->onRouteFinished();
        $route_collection = new RouteCollection();
        $route_collection->add('test_route1', new Route('/test/bar'));
        $route_collection->add('test_route2', new Route('/test/baz'));
        $route_collection->add('test_route3', new Route('/test2/bar/baz'));
        $event = new RouteBuildEvent($route_collection, 'provider');
        $this->pathRootsSubscriber
            ->onRouteAlter($event);
        $route_collection = new RouteCollection();
        $route_collection->add('test_route4', new Route('/test1/bar'));
        $route_collection->add('test_route5', new Route('/test2/baz'));
        $route_collection->add('test_route6', new Route('/test2/bar/baz'));
        $event = new RouteBuildEvent($route_collection, 'provider');
        $this->pathRootsSubscriber
            ->onRouteAlter($event);
        $this->state
            ->expects($this->once())
            ->method('set')
            ->with('router.path_roots', [
            'test',
            'test2',
            'test1',
        ]);
        $this->pathRootsSubscriber
            ->onRouteFinished();
    }

}