test: add minimal unit tests for some utilities #1340

Job	Run time
Check format	1m 27s
Smoke test	6m 0s
Build	2m 21s
Parallel testing (ubuntu-22.04)	28m 49s
Test intel fortran (ubuntu-22.04, intel-classic, 2021.7)	23m 34s
Parallel testing (macos-12)	57m 26s
Test gnu fortran (ubuntu-22.04)	23m 52s
Test intel fortran (macos-12, intel-classic, 2021.7)	27m 45s
Test gnu fortran (macos-12)	37m 44s
Test intel fortran (windows-2022, intel-classic, 2021.7)	1h 24m 49s
Test gnu fortran (windows-2022)	36m 15s
	5h 30m 2s

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