Add additional tests for publisher/subscriber interaction #85

Job	Run time
test (ubuntu-latest, 26.3)	2m 14s
test (ubuntu-latest, 27.2)	3m 32s
test (ubuntu-latest, 28.2)	3m 27s
test (ubuntu-latest, snapshot)	3m 32s
test (macos-latest, 26.3)	6m 0s
test (macos-latest, 27.2)	4m 48s
test (macos-latest, 28.2)	8m 53s
test (macos-latest, snapshot)	11m 27s
test (windows-latest, 26.3)	7m 8s
test (windows-latest, 27.2)	5m 39s
test (windows-latest, 28.2)	3m 55s
test (windows-latest, snapshot)	3m 54s
	1h 4m 29s

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