I would like to understand that if HCS and HNS integration tests from this project are run as part of Windows build process before new cumulative updates are released?

Based on my ~5 years experience with Windows containers and what I have discussed with other the most problematic part is that over time HNS networks get broken and that each cumulative update needs to be tested very carefully to be sure that they do not break environment.

Example last year there was this very ugly bug on cumulative update which why users was forced to skip half year security patches moby/moby#40998 and looks that there is still one open bug which is waiting for update to Windows moby/moby#41354 (comment)

I assume that it would be possible to catch those issues earlier by including more tests here but that does not help unless those tests really run as part of Windows build process.