fix(router): use Json\encode for encoding when sending json responses

packages/router/src/GenericResponseSender.php

@@ -104,7 +104,7 @@ private function sendContent(Response $response): void
         if ($response instanceof File || $response instanceof Download) {
             readfile($body);
         } elseif (is_array($body) || $body instanceof JsonSerializable) {
-            echo json_encode($body);
+            echo Json\encode($body);
         } elseif ($body instanceof View) {
             $this->renderView($response);
         } else {

tests/Integration/Http/GenericResponseSenderTest.php

@@ -19,6 +19,7 @@
 use Tempest\Http\ServerSentMessage;
 use Tempest\Http\Status;
 use Tempest\Router\GenericResponseSender;
+use Tempest\Support\Json\Exception\JsonCouldNotBeEncoded;
 use Tempest\View\ViewRenderer;
 use Tests\Tempest\Integration\FrameworkIntegrationTestCase;
 
@@ -117,6 +118,21 @@ public function test_sending_of_array_to_json(): void
         $this->assertSame('{"key":"value"}', $output);
     }
 
+    public function test_sending_invalid_json_throws_exception(): void
+    {
+        ob_start();
+        $response = new GenericResponse(
+            status: Status::CREATED,
+            body: ['key' => "\xB1\x31"],
+        );
+
+        $responseSender = $this->container->get(GenericResponseSender::class);
+
+        $this->assertException(JsonCouldNotBeEncoded::class, fn () => $responseSender->send($response));
+
+        ob_get_clean();
+    }
+
     public function test_sending_of_json_serializable_to_json(): void
     {
         ob_start();