Allow to pass findRelatedTests and nonFlagArgs to updateConfigAndRun

[wclr]

Summary

Allow to pass findRelatedTests and nonFlagArgs to updateConfigAndRun
This is a need to make possible runtime changes of config to filter running tests based on for example FS watching events (in watch plugin).

Example of the plugin that makes jest run only tests related to a changed file.

const chokidar = require('chokidar')

let updateConfigAndRun
let lastFileChanged

chokidar
  .watch('.', {
    ignored: /node_modules|\.tmp/,
  })
  .on('change', (f) => {
    lastFileChanged = f
  })

class RelatedWatchPlugin {
  apply(jestHooks) {
    jestHooks.onFileChange((x, f) => {
      if (updateConfigAndRun && lastFileChanged) {
        updateConfigAndRun({
          findRelatedTests: true,
          testPathPattern: lastFileChanged,
          nonFlagArgs: [lastFileChanged], // without setting nonFlagArgs it doesn't work
        })
        lastFileChanged = undefined
      }
    })

    jestHooks.shouldRunTestSuite((testSuiteInfo) => {
      if (!updateConfigAndRun) {
        // skip running test until enabled
        return false
      }
      return true
    })
  }
  getUsageInfo(gConfig) {
    return {
      key: 'n',
      prompt:
        (updateConfigAndRun ? 'disable' : 'enabled') +
        ' running related to fs changed files',
    }
  }
  run(_, updateAndRun) {
    updateConfigAndRun = updateConfigAndRun ? undefined : updateAndRun
    return Promise.resolve(false)
  }
}

Test plan

jest-core/__tests__/watch.test.js updated to check if options pass.

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[SimenB]

Can you add a changelog entry?

Also, and example watch plugin? Just so I understand the use case 🙂

[wclr]

@SimenB Added changelog entry and plugin example in PR desc.

[SimenB]

thanks!

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