Add FC in Error source objects

src/V1/ErrorSource.php

@@ -31,20 +31,22 @@ protected function parse(mixed $object): void
             throw new ValidationException('ErrorSource has to be an object, "' . gettype($object) . '" given.');
         }
 
-        if (property_exists($object, 'pointer')) {
-            if (!is_string($object->pointer)) {
-                throw new ValidationException('property "pointer" has to be a string, "' . gettype($object->pointer) . '" given.');
-            }
+        foreach (get_object_vars($object) as $key => $value) {
+            if ($key === 'pointer') {
+                if (!is_string($value)) {
+                    throw new ValidationException('property "pointer" has to be a string, "' . gettype($value) . '" given.');
+                }
 
-            $this->set('pointer', strval($object->pointer));
-        }
+                $this->set('pointer', strval($value));
+            } elseif ($key === 'parameter') {
+                if (!is_string($value)) {
+                    throw new ValidationException('property "parameter" has to be a string, "' . gettype($value) . '" given.');
+                }
 
-        if (property_exists($object, 'parameter')) {
-            if (!is_string($object->parameter)) {
-                throw new ValidationException('property "parameter" has to be a string, "' . gettype($object->parameter) . '" given.');
+                $this->set('parameter', strval($value));
+            } else {
+                $this->set($key, $value);
             }
-
-            $this->set('parameter', strval($object->parameter));
         }
     }
 

tests/Unit/V1/ErrorSourceTest.php

@@ -43,19 +43,21 @@ public function testOnlyPointerParameterPropertiesExists(): void
         $object = new \stdClass();
         $object->pointer = '/pointer';
         $object->parameter = 'parameter';
-        $object->ignore = 'must be ignored';
+        $object->fc = 'test property for forward compatability';
 
         $source = new ErrorSource($object, $this->manager, $this->parent);
 
         $this->assertInstanceOf(ErrorSource::class, $source);
         $this->assertInstanceOf(Accessable::class, $source);
-        $this->assertSame($source->getKeys(), ['pointer', 'parameter']);
+        $this->assertSame(['pointer', 'parameter', 'fc'], $source->getKeys());
 
         $this->assertFalse($source->has('ignore'));
         $this->assertTrue($source->has('pointer'));
-        $this->assertSame($source->get('pointer'), '/pointer');
+        $this->assertSame('/pointer', $source->get('pointer'));
         $this->assertTrue($source->has('parameter'));
-        $this->assertSame($source->get('parameter'), 'parameter');
+        $this->assertSame('parameter', $source->get('parameter'));
+        $this->assertTrue($source->has('fc'));
+        $this->assertSame('test property for forward compatability', $source->get('fc'));
 
         // test get() with not existing key throws an exception
         $this->assertFalse($source->has('something'));

tests/files/20_error_with_source_header_property.json

@@ -0,0 +1,12 @@
+{
+  "errors": [
+    {
+      "source": {
+        "header": "Content-Type"
+      }
+    }
+  ],
+  "jsonapi": {
+    "version": "1.1"
+  }
+}