Nested jest presets

[entropitor]

🐛 Bug Report

When a preset itself defines another preset, that preset is ignored

To Reproduce

Create a preset depending on another preset

Expected behavior

Both presets are merged

Run npx envinfo --preset jest

Paste the results here:

  System:
    OS: macOS 10.14.5
    CPU: (8) x64 Intel(R) Core(TM) i7-4980HQ CPU @ 2.80GHz
  Binaries:
    Node: 10.16.0 - ~/.nvm/versions/node/v10.16.0/bin/node
    Yarn: 1.17.3 - /usr/local/bin/yarn
    npm: 6.9.0 - ~/.nvm/versions/node/v10.16.0/bin/npm

[sormy]

As a workaround:

jest-preset.js:

const childPreset = require("child-preset")

module.exports = Object.assign(childPreset, {
  // current preset stuff
})

[entropitor]

It is working!

I had to do make a small tweak though:

const childPreset = require("child-preset/jest-preset.js")

module.exports = Object.assign(childPreset, {
  // current preset stuff
})

(It's possible you have to do .json instead of .js depending on the child preset you want to extend)

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