JSTests/test262/harness/promiseHelper.js

// Copyright (C) 2017 Ecma International.  All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.
/*---
description: |
    Check that an array contains a numeric sequence starting at 1
    and incrementing by 1 for each entry in the array. Used by
    Promise tests to assert the order of execution in deep Promise
    resolution pipelines.
---*/

function checkSequence(arr, message) {
  arr.forEach(function(e, i) {
    if (e !== (i+1)) {
      $ERROR((message ? message : "Steps in unexpected sequence:") +
             " '" + arr.join(',') + "'");
    }
  });

  return true;
}