Made response mediator content type aware

lib/Github/HttpClient/Message/ResponseMediator.php

@@ -9,14 +9,15 @@ class ResponseMediator
 {
     public static function getContent(Response $response)
     {
-        $body    = $response->getBody(true);
-        $content = json_decode($body, true);
-
-        if (JSON_ERROR_NONE !== json_last_error()) {
-            return $body;
+        $body = $response->getBody(true);
+        if (strpos($response->getContentType(), 'application/json') === 0) {
+            $content = json_decode($body, true);
+            if (JSON_ERROR_NONE === json_last_error()) {
+                return $content;
+            }
         }
 
-        return $content;
+        return $body;
     }
 
     public static function getPagination(Response $response)

test/Github/Tests/Functional/RepoTest.php

@@ -42,6 +42,24 @@ public function shouldRetrieveRawBlob()
         $this->assertStringStartsWith('<?php', $contents);
     }
 
+    /**
+     * @test
+     */
+    public function shouldNotDecodeRawBlob()
+    {
+        $api = $this->client->api('git_data')->blobs();
+        $api->configure('raw');
+
+        $contents = $api->show(
+            'KnpLabs',
+            'php-github-api',
+            'dc16d3e77fd4e40638cb722927ffe15fa85b1434'
+        );
+
+        $this->assertInternalType('string', $contents);
+        $this->assertStringStartsWith('{', $contents);
+    }
+
     /**
      * @test
      */

test/Github/Tests/HttpClient/Listener/ErrorListenerTest.php

@@ -120,6 +120,9 @@ public function shouldNotPassWhen400IsSent()
         $response->expects($this->once())
             ->method('getBody')
             ->will($this->returnValue(json_encode(array('message' => 'test'))));
+        $response->expects($this->once())
+            ->method('getContentType')
+            ->will($this->returnValue('application/json'));
         $response->expects($this->any())
             ->method('getStatusCode')
             ->will($this->returnValue(400));
@@ -159,6 +162,9 @@ public function shouldNotPassWhen422IsSentWithErrorCode($errorCode)
             ->method('getHeader')
             ->with('X-RateLimit-Limit')
             ->will($this->returnValue(5000));
+        $response->expects($this->once())
+            ->method('getContentType')
+            ->will($this->returnValue('application/json'));
         $response->expects($this->once())
             ->method('getBody')
             ->will($this->returnValue($content));

test/Github/Tests/Mock/TestResponse.php

@@ -36,4 +36,9 @@ public function getHeader($header = null)
 
         return $header;
     }
+
+    public function getContentType()
+    {
+        return 'application/json';
+    }
 }