draft-js/lib/NonASCIIStringSnapshotSerializer.js.flow

A React framework for building text editors.

/**
 * Copyright 2004-present Facebook. All Rights Reserved.
 *
 * @emails oncall+ads_integration_management
 * @flow strict-local
 * @format
 */
'use strict';

const MAX_ASCII_CHARACTER = 127;
/**
 * Serializes strings with non-ASCII characters to their Unicode escape
 * sequences (eg. \u2022), to avoid hitting this lint rule:
 * "Source code should only include printable US-ASCII bytes"
 */

const NonASCIIStringSnapshotSerializer = {
  test(val: mixed): boolean {
    if (typeof val !== 'string') {
      return false;
    }

    for (let i = 0; i < val.length; i++) {
      if (val.charCodeAt(i) > MAX_ASCII_CHARACTER) {
        return true;
      }
    }

    return false;
  },

  print: (val: string): string => {
    return '"' + val.split('').map(char => {
      const code = char.charCodeAt(0);
      return code > MAX_ASCII_CHARACTER ? '\\u' + code.toString(16).padStart(4, '0') : char;
    }).join('') // Keep the same behaviour as Jest's regular string snapshot
    // serialization, which escapes double quotes.
    .replace(/"/g, '\\"') + '"';
  }
};
module.exports = NonASCIIStringSnapshotSerializer;