Merge branch 'hotfix/319'

Close #319

Author: weierophinney

CHANGELOG.md

@@ -22,7 +22,9 @@ All notable changes to this project will be documented in this file, in reverse
 
 ### Fixed
 
-- Nothing.
+- [#319](https://github.com/zendframework/zend-diactoros/pull/319) provides a fix to `Zend\Diactoros\Response` that ensures that the status
+  code returned is _always_ an integer (and never a string containing an
+  integer), thus ensuring it strictly adheres to the PSR-7 specification.
 
 ## 1.8.2 - 2018-07-19
 

src/Response.php

@@ -186,6 +186,6 @@ private function setStatusCode($code)
                 static::MAX_STATUS_CODE_VALUE
             ));
         }
-        $this->statusCode = $code;
+        $this->statusCode = (int) $code;
     }
 }

test/ResponseTest.php

@@ -140,14 +140,18 @@ public function testCreateWithValidStatusCodes($code)
     {
         $response = $this->response->withStatus($code);
 
-        $this->assertSame($code, $response->getStatusCode());
+        $result = $response->getStatusCode();
+
+        $this->assertSame((int) $code, $result);
+        $this->assertInternalType('int', $result);
     }
 
     public function validStatusCodes()
     {
         return [
             'minimum' => [100],
             'middle' => [300],
+            'string-integer' => ['300'],
             'maximum' => [599],
         ];
     }