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Thanks @coreyfarrell!

This just updates what Jest uses during its own test runs. Could you also update the reporter jest uses in the normal case?

https://github.com/facebook/jest/blob/06842633c42580607874430f47b858359967d4ee/packages/jest-reporters/src/coverage_reporter.ts#L15

(and delete the vendored .d.ts file we have for istanbul-api 🙂)

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@SimenB yes that'll be next. Just wanted to start with something that was easier to test. I'll be AFK for a couple hours I'll try to work on the production reporter later today.

Perfect! Our own coverage run is ci/circleci: test-node-10, so if that's green then this first one worked great 🙂 When changing the jest reporter, every test run will test it since we have integration tests

Codecov Report

Merging #8294 into master will increase coverage by 0.02%.
The diff coverage is 100%.

@@            Coverage Diff             @@
##           master    #8294      +/-   ##
==========================================
+ Coverage   62.22%   62.24%   +0.02%     
==========================================
  Files         266      266              
  Lines       10720    10719       -1     
  Branches     2609     2607       -2     
==========================================
+ Hits         6670     6672       +2     
+ Misses       3463     3462       -1     
+ Partials      587      585       -2

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CI passed! 🎉 I'll figure out what parts to keep from the deleted test and merge this. Thanks @coreyfarrell!

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