Lithium Docs

						public function testRouteParsingWithOptionalParams() {
		$route = new Route(array(
			'template' => '/{:controller}/{:action}/{:id}', 'params' => array('id' => null)
		));
		$request = new Request();

		$request->url = '/posts';
		$result = $route->parse($request);
		$expected = array('controller' => 'posts', 'action' => 'index', 'id' => null);
		$this->assertEqual($expected, $result->params);

		$request->url = '/posts/index';
		$result = $route->parse($request);
		$this->assertEqual($expected, $result->params);

		$request->url = '/posts/index/';
		$result = $route->parse($request);
		$this->assertEqual($expected, $result->params);

		$request->url = '/posts/view/5';
		$result = $route->parse($request);
		$expected = array('controller' => 'posts', 'action' => 'view', 'id' => '5');
		$this->assertEqual($expected, $result->params);

		$request->url = '/';
		$this->assertFalse($route->parse($request));

		$request->url = '/posts/view/5/foo';
		$this->assertFalse($route->parse($request));
	}