Function checkedNodeCall

javascript/selenium-webdriver/lib/promise.js:49–59

* Wraps a function that expects a node-style callback as its final * argument. This callback expects two arguments: an error value (which will be * null if the call succeeded), and the success value as the second argument. * The callback will the resolve or reject the returned promise, based on i

(fn, ...args)

 *     result of the provided function's callback.
 */
function checkedNodeCall(fn, ...args) {
  return new Promise(function (fulfill, reject) {
    try {
      fn(...args, function (error, value) {
        error ? reject(error) : fulfill(value)
      })
    } catch (ex) {
      reject(ex)
    }
  })
}

/**
 * Registers a listener to invoke when a promise is resolved, regardless