Fixes order in which default initializers are injected

src/FormElementManager/FormElementManagerV2Polyfill.php

@@ -175,10 +175,11 @@ class FormElementManagerV2Polyfill extends AbstractPluginManager
      */
     public function __construct($configInstanceOrParentLocator = null, array $v3config = [])
     {
-        parent::__construct($configInstanceOrParentLocator, $v3config);
+        // Provide default initializers, ensuring correct order
+        array_unshift($this->initializers, [$this, 'injectFactory']);
+        array_push($this->initializers, [$this, 'callElementInit']);
 
-        $this->addInitializer([$this, 'injectFactory']);
-        $this->addInitializer([$this, 'callElementInit'], false);
+        parent::__construct($configInstanceOrParentLocator, $v3config);
     }
 
     /**
@@ -261,4 +262,32 @@ public function validatePlugin($plugin)
             ));
         }
     }
+
+    /**
+     * Overrides parent::addInitializer in order to ensure default initializers are in expected positions.
+     *
+     * Always pushes `injectFactory` to top of initializer stack, and
+     * `callElementInit` to the bottom.
+     *
+     * {@inheritDoc}
+     */
+    public function addInitializer($initializer, $topOfStack = true)
+    {
+        $firstInitializer = [$this, 'injectFactory'];
+        $lastInitializer  = [$this, 'callElementInit'];
+
+        foreach ([$firstInitializer, $lastInitializer] as $default) {
+            if (false === ($index = array_search($default, $this->initializers))) {
+                continue;
+            }
+            unset($this->initializers[$index]);
+        }
+
+        parent::addInitializer($initializer, $topOfStack);
+
+        array_unshift($this->initializers, $firstInitializer);
+        array_push($this->initializers, $lastInitializer);
+
+        return $this;
+    }
 }

src/FormElementManager/FormElementManagerV3Polyfill.php

@@ -202,22 +202,6 @@ class FormElementManagerV3Polyfill extends AbstractPluginManager
      */
     protected $instanceOf = ElementInterface::class;
 
-    /**
-     * Constructor
-     *
-     * Overrides parent constructor in order to add the initializer methods injectFactory()
-     * and callElementInit().
-     *
-     * @param ContainerInterface $parentLocator
-     * @param null|array $config
-     */
-    public function __construct(ContainerInterface $parentLocator = null, array $config = [])
-    {
-        $this->addInitializer([$this, 'injectFactory']);
-        parent::__construct($parentLocator, $config);
-        $this->addInitializer([$this, 'callElementInit']);
-    }
-
     /**
      * Inject the factory to any element that implements FormFactoryAwareInterface
      *
@@ -299,4 +283,32 @@ public function validate($plugin)
             ));
         }
     }
+
+    /**
+     * Overrides parent::configure in order to ensure default initializers are in expected positions.
+     *
+     * Always pushes `injectFactory` to top of initializer stack, and
+     * `callElementInit` to the bottom.
+     *
+     * {@inheritDoc}
+     */
+    public function configure(array $config)
+    {
+        $firstInitializer = [$this, 'injectFactory'];
+        $lastInitializer  = [$this, 'callElementInit'];
+
+        foreach ([$firstInitializer, $lastInitializer] as $default) {
+            if (false === ($index = array_search($default, $this->initializers))) {
+                continue;
+            }
+            unset($this->initializers[$index]);
+        }
+
+        parent::configure($config);
+
+        array_unshift($this->initializers, $firstInitializer);
+        array_push($this->initializers, $lastInitializer);
+
+        return $this;
+    }
 }

test/Integration/ServiceManagerTest.php

@@ -0,0 +1,126 @@
+<?php
+/**
+ * @link      http://github.com/zendframework/zend-form for the canonical source repository
+ * @copyright Copyright (c) 2016 Zend Technologies USA Inc. (http://www.zend.com)
+ * @license   http://framework.zend.com/license/new-bsd New BSD License
+ */
+
+namespace ZendTest\Form\Integration;
+
+use PHPUnit_Framework_TestCase as TestCase;
+use Prophecy\Argument;
+use Zend\Form\Element;
+use Zend\Form\Form;
+use Zend\Form\FormElementManager;
+use Zend\Form\FormElementManagerFactory;
+use Zend\ServiceManager\Config;
+use Zend\ServiceManager\InitializerInterface;
+use Zend\ServiceManager\ServiceManager;
+
+class ServiceManagerTest extends TestCase
+{
+    public function testInitInitializerShouldBeCalledAfterAllOtherInitializers()
+    {
+        // Reproducing the behaviour of a full stack MVC + ModuleManager
+        $serviceManagerConfig = new Config([
+            'factories' => [
+                'FormElementManager' => FormElementManagerFactory::class,
+            ],
+        ]);
+
+        $serviceManager = new ServiceManager();
+        $serviceManagerConfig->configureServiceManager($serviceManager);
+
+        $formElementManager = $serviceManager->get('FormElementManager');
+
+        $test = 0;
+        $spy = function () use (&$test) {
+            TestCase::assertEquals(1, $test);
+        };
+
+        $element = $this->prophesize(Element::class);
+        $element->init()->will($spy);
+
+        $initializer = $this->prophesize(InitializerInterface::class);
+        $incrementTest = function () use (&$test) {
+            $test += 1;
+        };
+
+        if (method_exists($serviceManager, 'configure')) {
+            $initializer->__invoke(
+                $serviceManager,
+                $element->reveal()
+            )->will($incrementTest)->shouldBeCalled();
+        } else {
+            $initializer->initialize(
+                $element->reveal(),
+                $formElementManager
+            )->will($incrementTest)->shouldBeCalled();
+        }
+
+        $formElementManagerConfig = new Config([
+            'factories' => [
+                'InitializableElement' => function () use ($element) {
+                    return $element->reveal();
+                },
+            ],
+            'initializers' => [
+                $initializer->reveal(),
+            ],
+        ]);
+
+        $formElementManagerConfig->configureServiceManager($formElementManager);
+
+        $formElementManager->get('InitializableElement');
+    }
+
+    public function testInjectFactoryInitializerShouldTriggerBeforeInitInitializer()
+    {
+        // Reproducing the behaviour of a full stack MVC + ModuleManager
+        $serviceManagerConfig = new Config([
+            'factories' => [
+                'FormElementManager' => FormElementManagerFactory::class,
+            ],
+        ]);
+
+        $serviceManager = new ServiceManager();
+        $serviceManagerConfig->configureServiceManager($serviceManager);
+
+        $formElementManager = $serviceManager->get('FormElementManager');
+
+        $initializer = $this->prophesize(InitializerInterface::class);
+        $formElementManagerAssertion = function ($form) use ($formElementManager) {
+            TestCase::assertInstanceOf(Form::class, $form);
+            TestCase::assertSame($formElementManager, $form->getFormFactory()->getFormElementManager());
+            return true;
+        };
+        if (method_exists($serviceManager, 'configure')) {
+            $initializer->__invoke(
+                $serviceManager,
+                Argument::that($formElementManagerAssertion)
+            )->shouldBeCalled();
+        } else {
+            $initializer->initialize(
+                Argument::that($formElementManagerAssertion),
+                $formElementManager
+            )->shouldBeCalled();
+        }
+
+        $formElementManagerConfig = new Config([
+            'factories' => [
+                'MyForm' => function () {
+                    return new TestAsset\Form();
+                },
+            ],
+            'initializers' => [
+                $initializer->reveal(),
+            ],
+        ]);
+
+        $formElementManagerConfig->configureServiceManager($formElementManager);
+
+        /** @var TestAsset\Form */
+        $form = $formElementManager->get('MyForm');
+        $this->assertSame($formElementManager, $form->elementManagerAtInit);
+    }
+}

test/Integration/TestAsset/Form.php

@@ -0,0 +1,26 @@
+<?php
+/**
+ * @link      http://github.com/zendframework/zend-form for the canonical source repository
+ * @copyright Copyright (c) 2016 Zend Technologies USA Inc. (http://www.zend.com)
+ * @license   http://framework.zend.com/license/new-bsd New BSD License
+ */
+
+namespace ZendTest\Form\Integration\TestAsset;
+
+use Zend\Form\Form as BaseForm;
+
+class Form extends BaseForm
+{
+    /**
+     * @param null|\Zend\Form\FormElementManager
+     */
+    public $elementManagerAtInit;
+
+    /**
+     * {@inheritDoc}
+     */
+    public function init()
+    {
+        $this->elementManagerAtInit = $this->getFormFactory()->getFormElementManager();
+    }
+}