[TASK] Refactor unit test to cover stdWrap_hash

Releases: master
Resolves: #76773
Change-Id: Ia079d14c274593e2ac198824c1fabd28d6b78e7a
Reviewed-on: https://review.typo3.org/48676


Reviewed-by: Daniel Goerz <ervaude@gmail.com>
Tested-by: Daniel Goerz <ervaude@gmail.com>
Tested-by: Bamboo TYPO3com <info@typo3.com>
Reviewed-by: Susanne Moog <typo3@susannemoog.de>
Tested-by: Susanne Moog <typo3@susannemoog.de>