Test and exception handler for backwards compatibility.

Author: iRedds

system/CodeIgniter.php

@@ -24,6 +24,7 @@
 use CodeIgniter\HTTP\Request;
 use CodeIgniter\HTTP\ResponseInterface;
 use CodeIgniter\HTTP\URI;
+use CodeIgniter\Router\Exceptions\RedirectException as DeprecatedRedirectException;
 use CodeIgniter\Router\RouteCollectionInterface;
 use CodeIgniter\Router\Router;
 use Config\App;
@@ -343,7 +344,7 @@ public function run(?RouteCollectionInterface $routes = null, bool $returnRespon
 
         try {
             $this->response = $this->handleRequest($routes, config(Cache::class), $returnResponse);
-        } catch (RedirectException $e) {
+        } catch (RedirectException|DeprecatedRedirectException $e) {
             $this->outputBufferingEnd();
             $logger = Services::logger();
             $logger->info('REDIRECTED ROUTE at ' . $e->getMessage());

tests/system/CodeIgniterTest.php

@@ -14,6 +14,7 @@
 use CodeIgniter\Config\Services;
 use CodeIgniter\Exceptions\ConfigException;
 use CodeIgniter\HTTP\Response;
+use CodeIgniter\Router\Exceptions\RedirectException;
 use CodeIgniter\Router\RouteCollection;
 use CodeIgniter\Test\CIUnitTestCase;
 use CodeIgniter\Test\Filters\CITestStreamFilter;
@@ -570,6 +571,29 @@ public function testRunRedirectionWithPOSTAndHTTPCode301()
         $this->assertSame(301, $response->getStatusCode());
     }
 
+    /**
+     * test for deprecated \CodeIgniter\Router\Exceptions\RedirectException for backward compatibility
+     */
+    public function testRedirectExceptionDeprecated(): void
+    {
+        $_SERVER['argv'] = ['index.php', '/'];
+        $_SERVER['argc'] = 2;
+
+        // Inject mock router.
+        $routes = Services::routes();
+        $routes->get('/', static function () {
+            throw new RedirectException('redirect-exception', 503);
+        });
+
+        $router = Services::router($routes, Services::incomingrequest());
+        Services::injectMock('router', $router);
+
+        $response = $this->codeigniter->run($routes, true);
+
+        $this->assertSame(503, $response->getStatusCode());
+        $this->assertSame('http://example.com/redirect-exception', $response->getHeaderLine('Location'));
+    }
+
     public function testStoresPreviousURL()
     {
         $_SERVER['argv'] = ['index.php', '/'];