Function stepIn

test/toolkit.js:9–21

()

  let iReject

  function stepIn () {
    if (done) {
      iReject(new Error('Unexpected done call'))
      return
    }

    if (--count) {
      return
    }

    done = true
    iResolve()
  }

  const patience = new Promise((resolve, reject) => {
    iResolve = resolve