Fix Nested form element wrapping (relative: #4383)

library/Zend/Form/Form.php

@@ -177,7 +177,9 @@ public function prepare()
             $this->prepareElement($this);
         } else {
             foreach ($this->getIterator() as $elementOrFieldset) {
-                if ($elementOrFieldset instanceof ElementPrepareAwareInterface) {
+                if ($elementOrFieldset instanceof FormInterface) {
+                    $elementOrFieldset->prepare();
+                } elseif ($elementOrFieldset instanceof ElementPrepareAwareInterface) {
                     $elementOrFieldset->prepareElement($this);
                 }
             }

tests/ZendTest/Form/FormTest.php

@@ -1519,4 +1519,19 @@ public function testAddRemove()
         $this->form->remove('file_resource');
         $this->assertEquals($form, $this->form);
     }
+
+    public function testNestedFormElementNameWrapping()
+    {
+        //build form
+        $rootForm = new Form;
+        $leafForm = new Form('form');
+        $element = new Element('element');
+        $leafForm->setWrapElements(true);
+        $leafForm->add($element);
+        $rootForm->add($leafForm);
+
+        //prepare for view
+        $rootForm->prepare();
+        $this->assertEquals('form[element]', $element->getName());
+    }
 }