[TASK] Refactor unit test to cover stdWrap_date

Releases: master
Resolves: #76777
Change-Id: I947fa7f1089c008b3143e40cee602ea9166f20e9
Reviewed-on: https://review.typo3.org/48682


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>