napi-rs/test_module/__test__/napi4/threadsafe_function.spec.ts

import test from 'ava'

import { napiVersion } from '../napi-version'

const bindings = require('../../index.node')

test('should get js function called from a thread', async (t) => {
  let called = 0

  if (napiVersion < 4) {
    t.is(bindings.testThreadsafeFunction, undefined)
    return
  }

  await new Promise((resolve, reject) => {
    bindings.testThreadsafeFunction((...args: any[]) => {
      called += 1
      try {
        t.deepEqual(args, [null, 42, 1, 2, 3])
      } catch (err) {
        reject(err)
      }

      if (called === 2) {
        resolve()
      }
    })
  })
})