[TASK] Add unit test to cover stdWrap_prioriCalc

Releases: master
Resolves: #76771
Change-Id: I5637810514ed2e3faa184ea89c1e859f960c0e51
Reviewed-on: https://review.typo3.org/48679


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