Even more functional tests (#512) #1508

Job	Run time
build packages	17s
linter	1m 16s
unit test / python 3.8	1m 0s
unit test / python 3.9	59s
unit test / python 3.10	1m 4s
unit test / python 3.11	1m 1s
verify packages / python 3.8 / ubuntu-latest	59s
verify packages / python 3.9 / ubuntu-latest	1m 3s
verify packages / python 3.10 / ubuntu-latest	1m 4s
verify packages / python 3.11 / ubuntu-latest	1m 7s
verify packages / python 3.8 / macos-latest	2m 48s
verify packages / python 3.9 / macos-latest	2m 38s
verify packages / python 3.10 / macos-latest	1m 26s
verify packages / python 3.11 / macos-latest	1m 43s
verify packages / python 3.8 / windows-latest	2m 14s
verify packages / python 3.9 / windows-latest	2m 23s
verify packages / python 3.10 / windows-latest	3m 2s
verify packages / python 3.11 / windows-latest	2m 26s
	28m 30s

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