e-lado/node_modules0/jest-matchers/build/index.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.
 *
 * 
 */

'use strict';












const matchers = require('./matchers');
const spyMatchers = require('./spyMatchers');
const toThrowMatchers = require('./toThrowMatchers');

const utils = require('jest-matcher-utils');var _require =






require('./jasmine-utils');const any = _require.any,anything = _require.anything,arrayContaining = _require.arrayContaining,objectContaining = _require.objectContaining,stringMatching = _require.stringMatching;

const GLOBAL_STATE = Symbol.for('$$jest-matchers-object');

class JestAssertionError extends Error {}



if (!global[GLOBAL_STATE]) {
  Object.defineProperty(
  global,
  GLOBAL_STATE,
  { value: {
      matchers: Object.create(null),
      state: {
        assertionsExpected: null,
        assertionsMade: 0,
        suppressedErrors: [] } } });



}

const expect = actual => {
  const allMatchers = global[GLOBAL_STATE].matchers;
  const expectation = { not: {} };
  Object.keys(allMatchers).forEach(name => {
    expectation[name] =
    makeThrowingMatcher(allMatchers[name], false, actual);
    expectation.not[name] =
    makeThrowingMatcher(allMatchers[name], true, actual);
  });

  return expectation;
};

const getMessage = message => {
  // for performance reasons some of the messages are evaluated
  // lazily
  if (typeof message === 'function') {
    message = message();
  }

  if (!message) {
    message = utils.RECEIVED_COLOR(
    'No message was specified for this matcher.');

  }
  return message;
};

const makeThrowingMatcher = (
matcher,
isNot,
actual) =>
{
  return function throwingMatcher() {
    let throws = true;
    const matcherContext = Object.assign(
    // When throws is disabled, the matcher will not throw errors during test
    // execution but instead add them to the global matcher state. If a
    // matcher throws, test execution is normally stopped immediately. The
    // snapshot matcher uses it because we want to log all snapshot
    // failures in a test.
    { dontThrow: () => throws = false },
    global[GLOBAL_STATE].state,
    {
      isNot,
      utils });


    let result;

    try {for (var _len = arguments.length, args = Array(_len), _key = 0; _key < _len; _key++) {args[_key] = arguments[_key];}
      result = matcher.apply(
      matcherContext,
      [actual].concat(args));

    } catch (error) {
      // Remove this and deeper functions from the stack trace frame.
      Error.captureStackTrace(error, throwingMatcher);
      throw error;
    }

    _validateResult(result);

    global[GLOBAL_STATE].state.assertionsMade++;

    if (result.pass && isNot || !result.pass && !isNot) {// XOR
      const message = getMessage(result.message);
      const error = new JestAssertionError(message);
      // Passing the result of the matcher with the error so that a custom
      // reporter could access the actual and expected objects of the result
      // for example in order to display a custom visual diff
      error.matcherResult = result;
      // Remove this function from the stack trace frame.
      Error.captureStackTrace(error, throwingMatcher);

      if (throws) {
        throw error;
      } else {
        global[GLOBAL_STATE].state.suppressedErrors.push(error);
      }
    }
  };
};

expect.extend = matchersObj => {
  Object.assign(global[GLOBAL_STATE].matchers, matchersObj);
};

expect.anything = anything;
expect.any = any;
expect.objectContaining = objectContaining;
expect.arrayContaining = arrayContaining;
expect.stringMatching = stringMatching;

const _validateResult = result => {
  if (
  typeof result !== 'object' ||
  typeof result.pass !== 'boolean' ||

  result.message &&

  typeof result.message !== 'string' &&
  typeof result.message !== 'function')


  {
    throw new Error(
    'Unexpected return from a matcher function.\n' +
    'Matcher functions should ' +
    'return an object in the following format:\n' +
    '  {message?: string | function, pass: boolean}\n' +
    `'${ utils.stringify(result) }' was returned`);

  }
};

// add default jest matchers
expect.extend(matchers);
expect.extend(spyMatchers);
expect.extend(toThrowMatchers);

expect.assertions = expected =>
global[GLOBAL_STATE].state.assertionsExpected = expected;


expect.setState = state => {
  Object.assign(global[GLOBAL_STATE].state, state);
};

expect.getState = () => global[GLOBAL_STATE].state;

module.exports = expect;