Request: Add --parallel to deno test

[jakajancar]

Would be nice if tests could be run in parallel.

Of course, assuming you take care of any shared resources correctly.

I'm fine giving up "leaking async ops" checks, or maybe just have one at the end "One of your tests leaked async ops, run without --parallel to troubleshoot"...

[caspervonb]

Just an aside; you can test files in parallel with something like xargs or par

find -name "*_test.ts" | xargs -P4 deno test -A --unstable

[jakajancar]

With separate processes, coordinating shared resource (e.g. db) parallelism / locking is non-trivial.

Within the same process you can just have the tests call a function.

[stale]

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[kt3k]

Jest has parallel testing builtin. I think this feature might help contributing to the adoption of deno test.

[caspervonb]

Yeah I've got plans to work on the test runner soon.

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This issue has been automatically marked as stale because it has not had recent activity. It will be closed in 7 days if no further activity occurs. Thank you for your contributions.

[vaysagekv]

Just an aside; you can test files in parallel with something like xargs or par

find -name "*_test.ts" | xargs -P4 deno test -A --unstable

I have tried the above comment. But still Deno test is running sequentially

[caspervonb]

I have tried the above comment. But still Deno test is running sequentially

Might need -n1 -P4

This will be added to the test runner in 1.9 however.
Reason for integrating it was to avoid re-checking the dependency graph for each test module loaded, turns out doing xargs was kinda slow 🙃