jest-jasmine2/build/isError.js

'use strict';

Object.defineProperty(exports, '__esModule', {
  value: true
});
exports.default = isError;
var _prettyFormat = require('pretty-format');
/**
 * Copyright (c) Facebook, Inc. and its affiliates. All Rights Reserved.
 *
 * This source code is licensed under the MIT license found in the
 * LICENSE file in the root directory of this source tree.
 */

function isError(
  // eslint-disable-next-line @typescript-eslint/explicit-module-boundary-types
  potentialError
) {
  // duck-type Error, see #2549
  const isError =
    potentialError !== null &&
    typeof potentialError === 'object' &&
    typeof potentialError.message === 'string' &&
    typeof potentialError.name === 'string';
  const message = isError
    ? null
    : `Failed: ${(0, _prettyFormat.format)(potentialError, {
        maxDepth: 3
      })}`;
  return {
    isError,
    message
  };
}