tests

refactors IFPS lib #1385

Job	Run time
audit dependencies (3.12, windows-latest)	2m 55s
test (3.8, windows-latest)	10m 59s
audit dependencies (3.12, macos-13)	1m 32s
test (3.8, macos-13)	11m 33s
audit dependencies (3.12, ubuntu-latest)	1m 9s
test (3.8, ubuntu-latest)	11m 45s
test (3.12, windows-latest)	10m 13s
test (3.12, macos-13)	11m 27s
test (3.12, ubuntu-latest)	7m 44s
coverage	0s
	1h 9m 17s

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