Add invalid cookie name test for RequestFunctionalTest

Author: cvilleger

src/Symfony/Component/HttpFoundation/Tests/Fixtures/invalid_cookie_name.expected

@@ -0,0 +1,6 @@
+
+Array
+(
+    [0] => Content-Type: text/plain; charset=utf-8
+)
+shutdown

src/Symfony/Component/HttpFoundation/Tests/Fixtures/invalid_cookie_name.php

@@ -0,0 +1,14 @@
+<?php
+
+use Symfony\Component\HttpFoundation\Cookie;
+use Symfony\Component\HttpFoundation\Response;
+
+require __DIR__ . '/common.inc';
+
+$r = new Response();
+try{
+    $r->headers->setCookie(new Cookie('Hello + world', 'hodor'));
+} catch (\InvalidArgumentException $e){
+    return null;
+}
+$r->sendHeaders();

src/Symfony/Component/HttpFoundation/Tests/RequestFunctionalTest.php

@@ -49,6 +49,12 @@ public function testCookieSamesite($fixture)
         $this->assertStringEqualsFile(__DIR__.sprintf('/Fixtures/%s.expected', $fixture), $result);
     }
 
+    public function testCookieShouldThrowExceptionForInvalidName()
+    {
+        $result = file_get_contents('http://localhost:8054/invalid_cookie_name.php');
+        $this->assertStringEqualsFile(__DIR__.'/Fixtures/invalid_cookie_name.expected', $result);
+    }
+
     public function provideCookie()
     {
         foreach (glob(__DIR__.'/Fixtures/cookie_*.php') as $file) {