dev(hansbug): add unittest #441

Job	Run time
Build Fake Exec (ubuntu-latest, 3.8)	47s
Build Fake Exec (windows-latest, 3.8)	2m 8s
Build Fake Exec (macos-latest, 3.8)	1m 7s
Code test (ubuntu-latest, 3.8)	2m 21s
Code test (ubuntu-latest, 3.9)	2m 21s
Code test (ubuntu-latest, 3.10)	2m 20s
Code test (ubuntu-latest, 3.11)	55s
Code test (ubuntu-latest, 3.12)	1m 27s
Code test (ubuntu-latest, pypy-3.8)	2m 30s
Code test (ubuntu-latest, pypy-3.9)	2m 14s
Code test (ubuntu-latest, pypy-3.10)	5m 5s
Code test (windows-latest, 3.8)	4m 2s
Code test (windows-latest, 3.9)	4m 18s
Code test (windows-latest, 3.10)	5m 2s
Code test (windows-latest, 3.11)	3m 16s
Code test (windows-latest, 3.12)	3m 9s
Code test (windows-latest, pypy-3.8)	4m 2s
Code test (windows-latest, pypy-3.9)	3m 44s
Code test (windows-latest, pypy-3.10)	3m 58s
Code test (macos-latest, 3.8)	1m 24s
Code test (macos-latest, 3.9)	1m 11s
Code test (macos-latest, 3.10)	1m 4s
Code test (macos-latest, 3.11)	51s
Code test (macos-latest, 3.12)	1m 8s
Code test (macos-latest, pypy-3.8)	2m 37s
Code test (macos-latest, pypy-3.9)	2m 36s
Code test (macos-latest, pypy-3.10)	2m 46s
	1h 8m 23s

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