until.js

import {Until} from './intern/Until'

/**
* Run `task` repeatedly until `test` returns `true`.
* Calls next `.catch()` at the first error encountered.
*
* @name until
* @memberOf module:serial
* @static
* @method
* @param {Function} test - test function `(index: number) => Boolean`.
* If return value is `true` then promise gets resolved
* @param {Function} task - iterator function of type `(index: Number) => Promise`
* @return {Promise}
*
* @example
* let arr = []
* until(
*   (index) => (index >= 4),
*   (index) => new Promise((resolve) => {
*     arr.push(index)
*     resolve(index)
*   })
* ).then((res) => {
*   //> res = 3
*   //> arr = [0, 1, 2, 3]
* })
*/
export default function until (test, task) {
  return new Promise((resolve, reject) => {
    new Until(test, task, {}, resolve, reject)
  })
}