[HttpFoundation] Fixed type mismatch

Author: Toflar

Response.php

@@ -311,7 +311,7 @@ public function prepare(Request $request)
         }
 
         // Check if we need to send extra expire info headers
-        if ('1.0' == $this->getProtocolVersion() && str_contains($headers->get('Cache-Control'), 'no-cache')) {
+        if ('1.0' == $this->getProtocolVersion() && str_contains($headers->get('Cache-Control', ''), 'no-cache')) {
             $headers->set('pragma', 'no-cache');
             $headers->set('expires', -1);
         }

Tests/ResponseTest.php

@@ -578,6 +578,12 @@ public function testPrepareSetsPragmaOnHttp10Only()
         $this->assertEquals('no-cache', $response->headers->get('pragma'));
         $this->assertEquals('-1', $response->headers->get('expires'));
 
+        $response = new Response('foo');
+        $response->headers->remove('cache-control');
+        $response->prepare($request);
+        $this->assertFalse($response->headers->has('pragma'));
+        $this->assertFalse($response->headers->has('expires'));
+
         $request->server->set('SERVER_PROTOCOL', 'HTTP/1.1');
         $response = new Response('foo');
         $response->prepare($request);