react-scripts/node_modules/jest-diff/build/index.js

Configuration and scripts for Create React App.

/**
 * 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.
 *
 * 
 */

'use strict';



const ReactElementPlugin = require('pretty-format/plugins/ReactElement');
const ReactTestComponentPlugin = require('pretty-format/plugins/ReactTestComponent');

const chalk = require('chalk');
const diffStrings = require('./diffStrings');var _require =
require('jest-matcher-utils');const getType = _require.getType;
const prettyFormat = require('pretty-format');

const jsxLikePlugins = [ReactTestComponentPlugin, ReactElementPlugin];
const NO_DIFF_MESSAGE = require('./constants').NO_DIFF_MESSAGE;

// Generate a string that will highlight the difference between two values
// with green and red. (similar to how github does code diffing)
function diff(a, b, options) {
  if (a === b) {
    return NO_DIFF_MESSAGE;
  }

  if (getType(a) !== getType(b)) {
    return (
      'Comparing two different types of values:\n' +
      `  Expected: ${ chalk.green(getType(a)) }\n` +
      `  Received: ${ chalk.red(getType(b)) }`);

  }

  switch (getType(a)) {
    case 'string':
      const multiline = a.match(/[\r\n]/) !== -1 && b.indexOf('\n') !== -1;
      if (multiline) {
        return diffStrings(String(a), String(b), options);
      }
      return null;
    case 'number':
    case 'boolean':
      return null;
    default:
      return diffStrings(
      prettyFormat(a, { plugins: jsxLikePlugins }, options),
      prettyFormat(b, { plugins: jsxLikePlugins }, options));}


}

module.exports = diff;