Fix for strip responses option

Author: hkarlstrom

src/OpenApiValidation.php

@@ -204,6 +204,9 @@ public function validateResponseBody(ResponseInterface &$response, string $path,
         if (null === $responseBodyData && $responseSchema) {
             return [['name' => 'responseBody', 'code' => 'error_required']];
         }
+        if ($this->options['stripResponse']) {
+            $responseSchema = JsonHelper::additionalProperties($responseSchema, false);
+        }
         $errors = $this->validateObject($responseSchema, json_encode($responseBodyData, JSON_PRESERVE_ZERO_FRACTION));
         if ($this->options['stripResponse']) {
             $notAdditionalOrNullErrors = [];

src/OpenApiValidation/Helpers/Json.php

@@ -30,4 +30,15 @@ public static function remove(array $json, array $path) : array
         }
         return $json;
     }
+    public static function additionalProperties(array $json, bool $allowAdditionalProperties) {
+        if (isset($json['properties'])) {
+            $json['additionalProperties'] = $allowAdditionalProperties;
+        }
+        foreach ($json as $key => &$value) {
+            if (is_array($value)) {
+                $value = self::additionalProperties($value,$allowAdditionalProperties);
+            }
+        }
+        return $json;
+    }
 }

tests/JsonHelperTest.php

@@ -0,0 +1,39 @@
+<?php
+
+/**
+ * OpenAPI Validation Middleware.
+ *
+ * @see       https://github.com/hkarlstrom/openapi-validation-middleware
+ *
+ * @copyright Copyright (c) 2018 Henrik Karlström
+ * @license   MIT
+ */
+
+namespace HKarlstrom\Middleware\OpenApiValidation;
+
+use PHPUnit\Framework\TestCase;
+
+class JsonHelperTest extends TestCase
+{
+    public function testAdditionalProperties()
+    {
+        $json = [
+            'type'=>'object',
+            'properties' => [
+                'foo' => [
+                    'type' => 'object',
+                    'properties' => [
+                        'bar' => [
+                            'type' => 'number'
+                        ]
+                    ]
+                ]
+            ]
+                        ];
+        $json = Helpers\Json::additionalProperties($json,false);
+        $this->assertArrayHasKey('additionalProperties',$json);
+        $this->assertFalse($json['additionalProperties']);
+        $this->assertArrayHasKey('additionalProperties',$json['properties']['foo']);
+        $this->assertFalse($json['properties']['foo']['additionalProperties']);
+    }
+}

tests/ResponsesTest.php

@@ -69,6 +69,7 @@ public function testStrip()
         $this->assertSame(200, $response->getStatusCode());
         $this->assertSame('test', $json['foo']);
         $this->assertSame(100, $json['bar']);
+        $this->assertFalse(isset($json['extra']));
     }
 
     public function testResponseEmpty()