Add some tests #17

Job	Run time
pytest / setup	5s
pytest / pytest (macos-latest, 3.8)	1m 23s
pytest / pytest (macos-latest, 3.9)	1m 4s
pytest / pytest (macos-latest, 3.10)	48s
pytest / pytest (macos-latest, 3.11)	46s
pytest / pytest (macos-latest, 3.12)	41s
pytest / pytest (ubuntu-22.04, 3.8)	1m 43s
pytest / pytest (ubuntu-22.04, 3.9)	1m 44s
pytest / pytest (ubuntu-22.04, 3.10)	1m 42s
pytest / pytest (ubuntu-22.04, 3.11)	1m 43s
pytest / pytest (ubuntu-22.04, 3.12)	1m 44s
pytest / pytest (windows-latest, 3.8)	1m 36s
pytest / pytest (windows-latest, 3.9)	1m 36s
pytest / pytest (windows-latest, 3.10)	1m 24s
pytest / pytest (windows-latest, 3.11)	1m 36s
pytest / pytest (windows-latest, 3.12)	1m 36s
pytest / pytest (ubuntu-20.04, 3.6)	37s
	21m 48s

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