MiniTest: optionally fail fast

[fallwith]

To have MiniTest "fail fast" and halt after encountering the first
failed test, set the "MT_FAIL_FAST" environment variable and then
proceed to run the tests as normal.

[github-actions]

Simplecov Report

	Coverage	Threshold
Line	64.99%	60%
Branch	34.49%	30%

[tannalynn]

Will this change apply to just one Minitest run? Like with multiverse, would one suite failing stop the rest of the suites after that? I see that its using an env variable, but I wasn't sure how this is working

[fallwith]

Will this change apply to just one Minitest run? Like with multiverse, would one suite failing stop the rest of the suites after that? I see that its using an env variable, but I wasn't sure how this is working

Great question. While I had intended this to only be used for local dev for now, I expected it to work for both the unit tests and the multiverse tests. But it seems that it currently only works for the unit tests.

I still get value from it as is, but I'll look into a solution that works across both sets of tests.

[tannalynn]

Will this change apply to just one Minitest run? Like with multiverse, would one suite failing stop the rest of the suites after that? I see that its using an env variable, but I wasn't sure how this is working

Great question. While I had intended this to only be used for local dev for now, I expected it to work for both the unit tests and the multiverse tests. But it seems that it currently only works for the unit tests.

I still get value from it as is, but I'll look into a solution that works across both sets of tests.

That makes sense, thank you for explaining that!