Hide details when report exceeds size limit

[maciejtutak]

This PR is based on the discussion in #262
Fixes #262

Hello,
Thank you for the detailed explanations and possible solutions. In the end, I decided to implement v1 of the discussed solutions in #262. The action will now omit coverage details spoilers below the summary if the report size exceeds the GitHub limit, like in the picture:

All in all, I think this is a pretty edge-casey issue, as usually PRs shouldn't grow that big in size, except when one does do a significant refactor. This solution is not perfect - it only strips the details, and doesn't cover for the case where the failed test results are a majority of the coverage report.

I'm not familiar enough with the tool to implement a smart truncation mechanism properly.

In my opinion, that would require either a bigger refactor or just drilling a param to truncate the details through various formatCoverage helper functions all the way to the bottom. We could think of perhaps, always truncating more than 50 rows of the tables, as I feel like that's too much already for a PR. Doing it that way, we could avoid drilling parameters. But that may not solve the issue of reports being too long that we set out to fix in the first place :P

[ArtiomTr]

Perfect 👍

[ArtiomTr]

@maciejtutak, thank you for your contribution.

Looks like you accidentally deleted tests/format/details/__snapshots__/getFileCoverageDetailRow.test.ts.snap file. Because of that, some tests are failing. Could you please run npm test -- -u to update all snapshots?

[maciejtutak]

I brought it back, my bad :)

[ArtiomTr]

@all-contributors please add @maciejtutak for code

[allcontributors]

@ArtiomTr

I've put up a pull request to add @maciejtutak! 🎉