findRelatedTests + coverage doesn't match findRelatedTests + collectCoverageFrom

[7rulnik]

🐛 Bug Report

As it said in docs and in this comment findRelatedTests + coverage should be equal to findRelatedTests and collectCoverageFrom. But it's not because we concat collectCoverageFrom from config with files from findRelatedTests.

To Reproduce

Compare these two commands:

yarn jest --findRelatedTests packages/jest-snapshot/src/dedentLines.ts --coverage

yarn jest --findRelatedTests packages/jest-snapshot/src/dedentLines.ts --coverage --collectCoverageFrom packages/jest-snapshot/src/dedentLines.ts

Expected behavior

I believe that result of these commands should be equal. Maybe we should override positive paths from collectCoverageFrom but leave negative (starts with !)?

envinfo

  System:
    OS: macOS 10.15.5
    CPU: (8) x64 Intel(R) Core(TM) i5-8259U CPU @ 2.30GHz
  Binaries:
    Node: 14.0.0 - ~/.fnm/current/bin/node
    Yarn: 1.22.4 - /usr/local/bin/yarn
    npm: 6.14.4 - ~/.fnm/current/bin/npm

[7rulnik]

Seems related to #7427

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