Detection of RedirectResponses when doing controller testing.

tests/_support/Helpers/ControllerResponse.php

@@ -1,5 +1,6 @@
 <?php namespace Tests\Support\Helpers;
 
+use CodeIgniter\HTTP\RedirectResponse;
 use CodeIgniter\HTTP\RequestInterface;
 use CodeIgniter\HTTP\ResponseInterface;
 
@@ -113,4 +114,14 @@ public function isOK(): bool
 		return true;
 	}
 
+	/**
+	 * Returns whether or not the Response was a redirect response
+	 *
+	 * @return bool
+	 */
+	public function isRedirect(): bool
+	{
+		return $this->response instanceof RedirectResponse;
+	}
+
 }

tests/_support/Helpers/ControllerTester.php

@@ -86,35 +86,42 @@ public function execute(string $method, ...$params)
 		// so ensure it's available.
 		helper('url');
 
-		$response = (new ControllerResponse())
+		$result = (new ControllerResponse())
 			->setRequest($this->request)
 			->setResponse($this->response);
 
 		try
 		{
 			ob_start();
 
-			$this->controller->{$method}(...$params);
+			$response = $this->controller->{$method}(...$params);
 		}
 		catch (\Throwable $e)
 		{
-			$response->response()
-			         ->setStatusCode($e->getCode());
+			$result->response()
+			       ->setStatusCode($e->getCode());
 		}
 		finally
 		{
 			$output = ob_get_clean();
 
-			$response->response()->setBody($output);
+			// If the controller returned a redirect response
+			// then we need to use that...
+			if (isset($response) && $response instanceof Response)
+			{
+				$result->setResponse($response);
+			}
+
+			$result->response()->setBody($output);
 		}
 
 		// If not response code has been sent, assume a success
-		if (empty($response->response()->getStatusCode()))
+		if (empty($result->response()->getStatusCode()))
 		{
-			$response->response()->setStatusCode(200);
+			$result->response()->setStatusCode(200);
 		}
 
-		return $response;
+		return $result;
 	}
 
 	/**