Tests

Add the unit tests #105

Job	Run time
unit (windows)	6h 0m 8s
unit (ubuntu)	6h 0m 15s
unit (macos)	6h 0m 17s
isort	25s
Test compatibility with the latest version of ydiff	25s
docs	2m 54s
pyright	34s
behave (ubuntu, 3.7, etcd)	12m 49s
behave (ubuntu, 3.7, kubernetes)	12s
behave (ubuntu, 3.7, exhibitor)	11m 43s
behave (ubuntu, 3.7, etcd3)	14m 7s
behave (ubuntu, 3.13, etcd)	11m 58s
behave (ubuntu, 3.7, raft)	13m 19s
behave (ubuntu, 3.13, exhibitor)	11m 58s
behave (ubuntu, 3.7, consul)	15m 11s
behave (ubuntu, 3.13, consul)	13m 53s
behave (ubuntu, 3.13, etcd3)	15m 13s
behave (macos, 3.11, etcd3)	17m 16s
behave (ubuntu, 3.13, kubernetes)	15m 15s
behave (ubuntu, 3.13, raft)	15m 31s
behave (macos, 3.8, raft)	15m 40s
behave (macos, 3.9, etcd)	10m 52s
Finalize Codacy	0s
Finalize coveralls.io	0s
	21h 19m 55s

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