added github workflow for unit tests

[willarmiros]

Which problem is this PR solving?

• Proposal: Use GitHub Actions for CI/CD opentelemetry-js#1259

Short description of the changes

Mostly just a copy of #272, with added paths for caching. I'm leaving CircleCI config in for now to allow both tests to run in parallel, but will remove them once I confirm everything passes on GH Actions. From there I believe it's up to the maintainers to remove CircleCI checks from branch protection & disable the workflow on CircleCI.

Next steps are to migrate container images test images from CircleCI to GHCR, then make a CD workflow using GH Actions which will require more discussion.

[codecov]

Codecov Report

Merging #328 (07c7a20) into main (17d9445) will decrease coverage by 1.13%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##             main     #328      +/-   ##
==========================================
- Coverage   95.02%   93.88%   -1.14%     
==========================================
  Files         135       12     -123     
  Lines        7194      409    -6785     
  Branches      672       45     -627     
==========================================
- Hits         6836      384    -6452     
+ Misses        358       25     -333     

Impacted Files	Coverage Δ
.../opentelemetry-plugin-mongodb/test/mongodb.test.ts
.../opentelemetry-instrumentation-graphql/src/enum.ts
...ins/node/opentelemetry-plugin-pg-pool/.eslintrc.js
...ry-instrumentation-user-interaction/src/version.ts
...pentelemetry-resource-detector-github/.eslintrc.js
...entelemetry-instrumentation-graphql/src/symbols.ts
...metry-instrumentation-graphql/test/graphql.test.ts
node/opentelemetry-plugin-ioredis/src/ioredis.ts
.../opentelemetry-plugin-dns/test/utils/assertSpan.ts
node/opentelemetry-plugin-mysql/src/utils.ts
... and 113 more

[willarmiros]

Fixed coverage to only run once (on Node 12) and removed CircleCI (which caused the CI failure). This should be ready for review!

[johnbley]

Looks like a good port to me, nice work.

[willarmiros]

Thanks @johnbley! I have no idea why the codecov is dropping on this, I thought running coverage on all Node versions instead of just Node 12 might help, but I guess not. Any ideas/does this impact merging?

[johnbley]

Thanks @johnbley! I have no idea why the codecov is dropping on this, I thought running coverage on all Node versions instead of just Node 12 might help, but I guess not. Any ideas/does this impact merging?

It doesn't look like a real problem to me, possibly just a blip owing to something not lining up right. The root checkout directories changed from/root/project/detectors/node/ to /__w/ and that might be confusing the codecov report? In any case it doesn't show any specific instances of actual decreased coverage, so I'm not particularly worried.

[dyladan]

Looks like this will report coverage for each version of node, not just 14

[willarmiros]

Oh yeah I removed the conditional here to see if it would fix the codecov diff, I'll add it back in.

[dyladan]

I'm going to approve with the assumption you will fix this before it gets merged

[willarmiros]

Should be good now :) thanks for the catch