Document and test dontThrow for custom inline snapshot matchers

[eps1lon]

Summary

Closes #10888

Only documents it for inline snapshots since full snapshots would be reported as obsolete which isn't really ideal behavior. I guess ideally we could detect if obsolete snapshots are part of a test that failed and a note that they might not be obsolete after-all. For inline snapshots the current behavior with dontThrow looks ok to me.

Test plan

• CI green (failures look unrelated)

[codecov-commenter]

Codecov Report

Merging #10995 (f41fd43) into master (bdd6282) will not change coverage.
The diff coverage is n/a.

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  Coverage   64.22%   64.22%           
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  Files         309      309           
  Lines       13519    13519           
  Branches     3294     3294           
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  Hits         8683     8683           
  Misses       4122     4122           
  Partials      714      714           

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[SimenB]

thanks!

could you add an entry to the changelog?

[eps1lon]

could you add an entry to the changelog?

I didn't actually change any implementation. Or should I just add an entry like "Allow bailing out of failing tests with custom inline snapshot matchers"?

[SimenB]

Yeah, under docs or something 👍

[github-actions]

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