Fix copying objects extending ArrayObject (#152) (#155)

fixtures/f011/ArrayObjectExtended.php

@@ -0,0 +1,16 @@
+<?php declare(strict_types=1);
+
+namespace DeepCopy\f011;
+
+use ArrayObject;
+
+class ArrayObjectExtended extends ArrayObject
+{
+    public $x;
+
+    public function __construct($x)
+    {
+        parent::__construct();
+        $this->x = $x;
+    }
+}

src/DeepCopy/TypeFilter/Spl/ArrayObjectFilter.php

@@ -1,7 +1,6 @@
 <?php
 namespace DeepCopy\TypeFilter\Spl;
 
-use ArrayObject;
 use DeepCopy\DeepCopy;
 use DeepCopy\TypeFilter\TypeFilter;
 
@@ -26,11 +25,12 @@ public function __construct(DeepCopy $copier)
      */
     public function apply($arrayObject)
     {
-        return new ArrayObject(
-            $this->copier->copy($arrayObject->getArrayCopy()),
-            $arrayObject->getFlags(),
-            $arrayObject->getIteratorClass()
-        );
+        $clone = clone $arrayObject;
+        foreach ($arrayObject->getArrayCopy() as $k => $v) {
+            $clone->offsetSet($k, $this->copier->copy($v));
+        }
+
+        return $clone;
     }
 }
 

tests/DeepCopyTest/DeepCopyTest.php

@@ -18,6 +18,7 @@
 use DeepCopy\f007;
 use DeepCopy\f008;
 use DeepCopy\f009;
+use DeepCopy\f011;
 use DeepCopy\Filter\KeepFilter;
 use DeepCopy\Filter\SetNullFilter;
 use DeepCopy\Matcher\PropertyNameMatcher;
@@ -391,14 +392,30 @@ public function test_it_can_deep_copy_an_array_object()
     {
         $foo = new f003\Foo('foo');
         $foo->setProp('bar');
-        $object = new ArrayObject(['foo' => $foo, \ArrayObject::ARRAY_AS_PROPS, \RecursiveArrayIterator::class]);
+        $object = new ArrayObject(['foo' => $foo, ArrayObject::ARRAY_AS_PROPS, \RecursiveArrayIterator::class]);
 
         $copy = deep_copy($object);
 
         $this->assertEqualButNotSame($object, $copy);
         $this->assertEqualButNotSame($foo, $copy['foo']);
     }
 
+    /**
+     * @ticket https://github.com/myclabs/DeepCopy/issues/152
+     */
+    public function test_it_clones_objects_extending_array_object()
+    {
+        $object = new f011\ArrayObjectExtended('foo');
+        $object->setFlags(ArrayObject::ARRAY_AS_PROPS);
+        $object->setIteratorClass(\RecursiveArrayIterator::class);
+        $object['a'] = new f011\ArrayObjectExtended('bar');
+
+        $copy = deep_copy($object);
+
+        $this->assertEqualButNotSame($object, $copy);
+        $this->assertEqualButNotSame($object['a'], $copy['a']);
+    }
+
     /**
      * @ticket https://github.com/myclabs/DeepCopy/pull/49
      */

tests/DeepCopyTest/TypeFilter/Spl/ArrayObjectFilterTest.php

@@ -37,11 +37,11 @@ protected function setUp(): void
     public function test_it_deep_copies_an_array_object(): void
     {
         $arrayObject = new ArrayObject(['foo' => 'bar'], ArrayObject::ARRAY_AS_PROPS, RecursiveArrayIterator::class);
-        $this->copierProphecy->copy(['foo' => 'bar'])->willReturn(['copy' => 'bar']);
+        $this->copierProphecy->copy('bar')->willReturn('baz');
 
         /** @var \ArrayObject $newArrayObject */
         $newArrayObject = $this->arrayObjectFilter->apply($arrayObject);
-        $this->assertSame(['copy' => 'bar'], $newArrayObject->getArrayCopy());
+        $this->assertSame(['foo' => 'baz'], $newArrayObject->getArrayCopy());
         $this->assertSame(ArrayObject::ARRAY_AS_PROPS, $newArrayObject->getFlags());
         $this->assertSame(RecursiveArrayIterator::class, $newArrayObject->getIteratorClass());
     }