e-lado/node_modules0/jest-matchers/build/utils.js

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/**
 * Copyright (c) 2014, Facebook, Inc. All rights reserved.
 *
 * This source code is licensed under the BSD-style license found in the
 * LICENSE file in the root directory of this source tree. An additional grant
 * of patent rights can be found in the PATENTS file in the same directory.
 *
 * 
 */
/* eslint-disable max-len */

'use strict';








const getPath = (object, propertyPath) => {
  if (!Array.isArray(propertyPath)) {
    propertyPath = propertyPath.split('.');
  }

  const lastProp = propertyPath.length === 1;

  if (propertyPath.length) {
    const prop = propertyPath[0];
    const newObject = object[prop];
    if (!lastProp && (newObject === null || newObject === undefined)) {
      // This is not the last prop in the chain. If we keep recursing it will hit a
      // `can't access property X of undefined | null`. At this point we know that the
      // chain broken and we return right away.
      return {
        hasEndProp: false,
        lastTraversedObject: object,
        traversedPath: [] };

    } else {
      const result = getPath(newObject, propertyPath.slice(1));
      result.lastTraversedObject || (result.lastTraversedObject = object);
      result.traversedPath.unshift(prop);
      if (propertyPath.length === 1) {
        result.hasEndProp = object.hasOwnProperty(prop);
        if (!result.hasEndProp) {
          delete result.value;
          result.traversedPath.shift();
        }
      }
      return result;
    }
  } else {
    return {
      lastTraversedObject: null,
      traversedPath: [],
      value: object };

  }
};


module.exports = {
  getPath };