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POHow to inject mock classes into controllers (without having the controller aware of the tests)
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copied!<p>This is a follow-on from a previous question I had: <a href="https://stackoverflow.com/questions/6222001/how-to-decouple-my-data-layer-better-and-restrict-the-scope-of-my-unit-tests">How to decouple my data layer better and restrict the scope of my unit tests?</a></p> <p>I've read around on Zend and DI/IoC and came up with the following changes to my code:</p> <p><strong>Module Bootstrap</strong></p> <pre><code>class Api_Bootstrap extends Zend_Application_Module_Bootstrap { protected function _initAllowedMethods() { $front = Zend_Controller_Front::getInstance(); $front->setParam('api_allowedMethods', array('POST')); } protected function _initResourceLoader() { $resourceLoader = $this->getResourceLoader(); $resourceLoader->addResourceType('actionhelper', 'controllers/helpers', 'Controller_Action_Helper'); } protected function _initActionHelpers() { Zend_Controller_Action_HelperBroker::addHelper(new Api_Controller_Action_Helper_Model()); } } </code></pre> <p><strong>Action Helper</strong></p> <pre><code>class Api_Controller_Action_Helper_Model extends Zend_Controller_Action_Helper_Abstract { public function preDispatch() { if ($this->_actionController->getRequest()->getModuleName() != 'api') { return; } $this->_actionController->addMapper('account', new Application_Model_Mapper_Account()); $this->_actionController->addMapper('product', new Application_Model_Mapper_Product()); $this->_actionController->addMapper('subscription', new Application_Model_Mapper_Subscription()); } } </code></pre> <p><strong>Controller</strong></p> <pre><code>class Api_AuthController extends AMH_Controller { protected $_mappers = array(); public function addMapper($name, $mapper) { $this->_mappers[$name] = $mapper; } public function validateUserAction() { // stuff $accounts = $this->_mappers['account']->find(array('username' => $username, 'password' => $password)); // stuff } } </code></pre> <p>So, now, the controller doesn't care what specific classes the mappers are - so long as there is a mapper...</p> <p>But <strong>how do I now replace those classes with mocks for unit-testing without making the application/controller aware that it is being tested?</strong> All I can think of is putting something in the action helper to detect the current application enviroment and load the mocks directly:</p> <pre><code>class Api_Controller_Action_Helper_Model extends Zend_Controller_Action_Helper_Abstract { public function preDispatch() { if ($this->_actionController->getRequest()->getModuleName() != 'api') { return; } if (APPLICATION_ENV != 'testing') { $this->_actionController->addMapper('account', new Application_Model_Mapper_Account()); $this->_actionController->addMapper('product', new Application_Model_Mapper_Product()); $this->_actionController->addMapper('subscription', new Application_Model_Mapper_Subscription()); } else { $this->_actionController->addMapper('account', new Application_Model_Mapper_AccountMock()); $this->_actionController->addMapper('product', new Application_Model_Mapper_ProductMock()); $this->_actionController->addMapper('subscription', new Application_Model_Mapper_SubscriptionMock()); } } } </code></pre> <p>This just seems wrong...</p>

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