VLEX/BPM-UI/node_modules/zone.js/dist/zone-patch-promise-test.js

/**
* @license
* Copyright Google Inc. All Rights Reserved.
*
* Use of this source code is governed by an MIT-style license that can be
* found in the LICENSE file at https://angular.io/license
*/
(function (global, factory) {
	typeof exports === 'object' && typeof module !== 'undefined' ? factory() :
	typeof define === 'function' && define.amd ? define(factory) :
	(factory());
}(this, (function () { 'use strict';

/**
 * @license
 * Copyright Google Inc. All Rights Reserved.
 *
 * Use of this source code is governed by an MIT-style license that can be
 * found in the LICENSE file at https://angular.io/license
 */
/**
 * Promise for async/fakeAsync zoneSpec test
 * can support async operation which not supported by zone.js
 * such as
 * it ('test jsonp in AsyncZone', async() => {
 *   new Promise(res => {
 *     jsonp(url, (data) => {
 *       // success callback
 *       res(data);
 *     });
 *   }).then((jsonpResult) => {
 *     // get jsonp result.
 *
 *     // user will expect AsyncZoneSpec wait for
 *     // then, but because jsonp is not zone aware
 *     // AsyncZone will finish before then is called.
 *   });
 * });
 */
Zone.__load_patch('promisefortest', function (global, Zone, api) {
    var symbolState = api.symbol('state');
    var UNRESOLVED = null;
    var symbolParentUnresolved = api.symbol('parentUnresolved');
    // patch Promise.prototype.then to keep an internal
    // number for tracking unresolved chained promise
    // we will decrease this number when the parent promise
    // being resolved/rejected and chained promise was
    // scheduled as a microTask.
    // so we can know such kind of chained promise still
    // not resolved in AsyncTestZone
    Promise[api.symbol('patchPromiseForTest')] = function patchPromiseForTest() {
        var oriThen = Promise[Zone.__symbol__('ZonePromiseThen')];
        if (oriThen) {
            return;
        }
        oriThen = Promise[Zone.__symbol__('ZonePromiseThen')] = Promise.prototype.then;
        Promise.prototype.then = function () {
            var chained = oriThen.apply(this, arguments);
            if (this[symbolState] === UNRESOLVED) {
                // parent promise is unresolved.
                var asyncTestZoneSpec = Zone.current.get('AsyncTestZoneSpec');
                if (asyncTestZoneSpec) {
                    asyncTestZoneSpec.unresolvedChainedPromiseCount++;
                    chained[symbolParentUnresolved] = true;
                }
            }
            return chained;
        };
    };
    Promise[api.symbol('unPatchPromiseForTest')] = function unpatchPromiseForTest() {
        // restore origin then
        var oriThen = Promise[Zone.__symbol__('ZonePromiseThen')];
        if (oriThen) {
            Promise.prototype.then = oriThen;
            Promise[Zone.__symbol__('ZonePromiseThen')] = undefined;
        }
    };
});

})));