Resolve coverage reporting issues with CodeCov

[jywarren]

After #5931, @kaustubh-nair opened #5954 to switch our test coverage reporting to CodeCov. But there is some issue with coverage esp with the separately threaded tests we have running now. We'd love help debugging/resolving this if anyone has some experience with Travis and coverage monitoring!

[jywarren]

Ideally we'll be starting to get a nice coverage graph like this!

In each PR. Of course, ideally it'd all be green 😄

[SidharthBansal]

@jywarren i think making this as a whole as a hall of fame task is a great idea (Maybe I am wrong. I think this task is removing code coverage errors from whole plots2 repo)

[jywarren]

Yes this'd be great!

On Fri, Dec 13, 2019 at 1:52 PM Sidharth Bansal notifications@github.com wrote:

@jywarren https://github.com/jywarren i think making this as a whole as a hall of fame task is a great idea (Maybe I am wrong. I think this task is removing code coverage errors from whole plots2 repo)

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[SidharthBansal]

Published

[Uzay-G]

Hey, I might work on this but was wondering, how can I test my changes to the code? Thanks!

[Uzay-G]

I noticed that for some reason the config file has a section omment instead of comment. This seems a bit trivial but maybe that is a cause of the problem. Also would anyone happen to know when the bot stopped working? That way I could try and pinpoint the problem.

[Uzay-G]

Also does the codecov config need to be in the master branch for the reports to work? I am just trying things out that might work, sorry if I am making gross mistakes :smile:

[SidharthBansal]

@jywarren @Uzay-G do we need some more changes? If there are only 3 lines of code change, I think this should be hard issue. If more work is needed then we can stick with HoF

[SidharthBansal]

Thanks Uzay-G for your help

[Uzay-G]

Thans @SidharthBansal. Yeah you can turn it into a hard one instead :+1:

[Uzay-G]

Now we just need to resolve the conflicts of #5954 and merge into master.

[SidharthBansal]

Please work on any other issue in the meantime. Jeff is on holidays.

[jywarren]

Just referencing a few issues together here. A recent example issue at https://github.com/publiclab/plots2/pull/6875#issuecomment-570288690

Issues possibly related to parallelization documented at https://github.com/publiclab/plots2/issues/5931

And follow-up notes and concerns from this process at #5954 ...

[jywarren]

In https://github.com/publiclab/plots2/pull/6789, coverage was to drop to 50%, but on rebasing, it went up to very little change and all passed. This makes me worry about the parallelization issue?

[jywarren]

OK, coming back here; i think things are OK... notes:

https://docs.codecov.io/docs/merging-reports says it can handle parallel reports already with no config needed.

https://docs.codecov.io/docs/unexpected-coverage-changes has some useful info too.

https://github.com/publiclab/plots2/pull/7061 was compaining that the diff coverage is not as high as the project (32% vs 80%) so I wonder @Uzay-G if we should give 1% flexibility on this, and how we configure this?

[jywarren]

Maybe we can lower the strictness here? https://docs.codecov.io/docs/codecovyml-reference#section-codecov

Also we can ignore some folders if we think that's appropriate...

[jywarren]

Yes, we can set threshold here! https://docs.codecov.io/docs/commit-status#section-threshold

[Uzay-G]

Yeah I think we need to make it more flexible. I will look at this later tonight when I can! :+1:

[Uzay-G]

Ok I can make a pull request for the threshold, do you think we should set it around 5-8%?

[jywarren]

Oh, i was thinking more like 1% - isn't it the "wiggle room" for the overall project coverage to change +/- as a result of the PR? But yes, let's try it out!

On Fri, Jan 3, 2020 at 3:51 PM Uzay-G notifications@github.com wrote:

Ok I can make a pull request for the threshold, do you think we should set it around 5-8%?

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[Uzay-G]

Oh ok yeah alright! I'll make the pull request now for the threshold! :+1: