added missing test

Author: fabpot

Tests/ResponseTest.php

@@ -445,6 +445,8 @@ public function testPrepareRemovesContentForInformationalResponse()
         $response->setStatusCode(101);
         $response->prepare($request);
         $this->assertEquals('', $response->getContent());
+        $this->assertFalse($response->headers->has('Content-Type'));
+        $this->assertFalse($response->headers->has('Content-Length'));
 
         $response->setContent('content');
         $response->setStatusCode(304);