TYPO3 Core

The Core creates a dummy TSFE object in various places and uses mostly \stdClass for this.
On the other hand the Core relies on $GLOBALS['TSFE'] being actually of type TypoScriptFrontendController in everywhere.

It should be considered to refactor these fake TSFE implementation to either a central service that takes care of creating a valid "shim", or
TypoScriptFrontendController should be refactored to maybe a class hierarchy where sort of a base-class can be used for "fake TSFE"s.

Currently fake TSFEs are used in:

• \TYPO3\CMS\Extbase\Utility\FrontendSimulatorUtility::simulateFrontendEnvironment
• \TYPO3\CMS\Fluid\ViewHelpers\CObjectViewHelper::simulateFrontendEnvironment
• \TYPO3\CMS\Fluid\ViewHelpers\Format\HtmlViewHelper::simulateFrontendEnvironment
• (\TYPO3\CMS\Redirects\Service\RedirectService::bootFrontendController this one uses the real class)