重置Zend Framework中的所有视图助手

Question

Is there a way to reset the state of all view helpers, for example remove all scripts added with headScript()? Scripts and meta tags added in one unit test are being seen by the following unit tests even though I am creating a new controller and view for each test. This is causing false positives and negatives.

Answer 1

Marcin's comment led me to the root cause of the problem in our testing framework, which is that the placeholder registry was being added to the Zend registry before the code that takes a snapshot of the registry was run. Thus, when the code that removes all new registry objects run, it was no longer removing the placeholder registry.

To reset the state for all placeholder-based view helpers, use this:

$registry = Zend_Registry::getInstance();
unset($registry['Zend_View_Helper_Placeholder_Registry']);