> in many CI environments unit tests don't have network access, it's not purely a price consideration.

I've never seen a hard block on network access (how do you install packages/pull images?) but I am sympathetic to wanting to enforce that unit tests run quickly by minimizing/eliminating RTT to networked services.

We've considered the possibility of a local simulator before. Let me know if it winds up being a blocker for your use case.

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lambda an hour ago | parent [-]

> how do you install packages/pull images

You pre-build the images with packages installed beforehand, then use those image offline.

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benesch an hour ago | parent [-]

My point is it's enough of a hassle to set up that I've yet to see that level of restriction in practice (across hundreds of CI systems).

	▲	dzbarsky 14 minutes ago \| parent [-]
		Look into Bazel, a very standard build system used at many large tech companies. It splits fetches from build/test actions and allows blocking network for build/test actions with a single CLI flag. No hassle at all. The fact that you haven't come across this kind of setup suggests that your hundreds of CI systems are not representative of the industry as a whole.