More tests for mo_util_string

What is the new feature

Add more unit-tests for mo_util_string

How is it implemented

Each public subroutine has its own test

Mandatory steps before review

• Gitlab CI passes (Hint: use make format for linting)
• New feature is covered by additional unit tests
• Mark the merge request as ready by removing Draft:

Mandatory steps before merge

• Test coverage does not decrease
• Reviewed by a maintainer
• Incorporate review suggestions
• Remember to edit the commit message and select the proper changelog category (feature/bugfix/other)

You are not supposed to merge this request by yourself, the maintainers of fortan-support take care of this action!

added test label

added 1 commit

• f9c1a33a - format

Compare with previous version

added 1 commit

• c953e5d3 - more tests

Compare with previous version

added 1 commit

• f9c8a717 - most test for util_string

Compare with previous version

marked this merge request as draft

added 1 commit

• d84bdedc - more test

Compare with previous version

added 1 commit

• 63fdc785 - all test added

Compare with previous version

changed the description

marked the checklist item Gitlab CI passes (Hint: use make format for linting) as completed

marked the checklist item New feature is covered by additional unit tests as completed

marked this merge request as ready

changed title from Draft: more tests for util_string to More tests for mo_util_string

marked the checklist item Mark the merge request as ready by removing Draft: as completed

marked the checklist item Test coverage does not decrease as completed

requested review from @b382190

mentioned in issue #7

added ready for review label

LGTM in general. Thanks for adding the tests. One minor problem is that each FortUTF ASSERT function should be tagged by a different TAG_NAME, even if they are in the same subroutine.