Ensure worker close gracefully with the same behaviours in both Terminal and Desktop apps

[maidh91]

App Type

• Terminal and Desktop apps can call Pear.Worker.run api to start Worker process
• Parent/Worker can call pipe.end or pipe.destroy
• These scenarios should be passed, and same behaviours in Terminal and Desktop apps

Scenarios

• Parent calls pipe.end()

  • Worker receives end event
  • Worker receives close event
  • Worker is killed
  • Parent receives end event
  • Parent receives close event

• Parent calls pipe.destroy()

  • Worker receives end event
  • Worker receives close event
  • Worker is killed
  • Parent receives close event only (no end event)

• Worker calls pipe.end()

  • Worker receives end event
  • Worker receives close event
  • Worker is killed
  • Parent receives end event
  • Parent receives close event

• Worker calls pipe.end()

  • Worker receives close event only (no end event)
  • Worker is killed
  • Parent receives end event
  • Parent receives close event

How to test

Sample Parent code

const pipe = Pear.worker.run('../worker-code')
pipe.on('data', (data) => {
  console.log(data.toString())
})
pipe.on('end', () => {
  console.log('end')
})
pipe.on('close', () => {
  console.log('close')
})
pipe.write('hello')
await new Promise((resolve) => setTimeout(resolve, 2000))
// pipe.end()
// pipe.destroy()
await new Promise((resolve) => setTimeout(resolve, 20000))

Sample Worker code

import fs from 'bare-fs'
const pipe = Pear.worker.pipe()
pipe.on('data', (data) => {
  pipe.write('world')
  fs.writeFileSync('/tmp/test-data', data.toString())
})
pipe.on('end', () => {
  fs.writeFileSync('/tmp/test-end', 'end')
})
pipe.on('close', () => {
  fs.writeFileSync('/tmp/test-close', 'close')
})
await new Promise((resolve) => setTimeout(resolve, 2000))
// pipe.end()
// pipe.destroy()

• Run pear.dev run -d parent-code-dir
• Uncomment pipe.end() or pipe.destroy()
• Make sure Worker process is killed
• Check /tmp/test-data, /tmp/test-end, /tmp/test-close for worker events

Add tests