mirror of
https://github.com/nasa/openmct.git
synced 2024-12-22 14:32:22 +00:00
99 lines
3.6 KiB
JavaScript
99 lines
3.6 KiB
JavaScript
/*****************************************************************************
|
|
* Open MCT Web, Copyright (c) 2014-2015, United States Government
|
|
* as represented by the Administrator of the National Aeronautics and Space
|
|
* Administration. All rights reserved.
|
|
*
|
|
* Open MCT Web is licensed under the Apache License, Version 2.0 (the
|
|
* "License"); you may not use this file except in compliance with the License.
|
|
* You may obtain a copy of the License at
|
|
* http://www.apache.org/licenses/LICENSE-2.0.
|
|
*
|
|
* Unless required by applicable law or agreed to in writing, software
|
|
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
|
|
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
|
|
* License for the specific language governing permissions and limitations
|
|
* under the License.
|
|
*
|
|
* Open MCT Web includes source code licensed under additional open source
|
|
* licenses. See the Open Source Licenses file (LICENSES.md) included with
|
|
* this source code distribution or the Licensing information page available
|
|
* at runtime from the About dialog for additional information.
|
|
*****************************************************************************/
|
|
/*global spyOn*/
|
|
define(
|
|
function () {
|
|
|
|
/**
|
|
* An instrumented promise implementation for better control of promises
|
|
* during tests.
|
|
*
|
|
*/
|
|
function ControlledPromise() {
|
|
this.resolveHandlers = [];
|
|
this.rejectHandlers = [];
|
|
spyOn(this, 'then').andCallThrough();
|
|
}
|
|
|
|
|
|
/**
|
|
* Resolve the promise, passing the supplied value to all resolve
|
|
* handlers.
|
|
*/
|
|
ControlledPromise.prototype.resolve = function (value) {
|
|
this.resolveHandlers.forEach(function (handler) {
|
|
handler(value);
|
|
});
|
|
};
|
|
|
|
/**
|
|
* Reject the promise, passing the supplied value to all rejection
|
|
* handlers.
|
|
*/
|
|
ControlledPromise.prototype.reject = function (value) {
|
|
this.rejectHandlers.forEach(function (handler) {
|
|
handler(value);
|
|
});
|
|
};
|
|
|
|
/**
|
|
* Standard promise.then, returns a promise that support chaining.
|
|
* TODO: Need to support resolve/reject handlers that return promises.
|
|
*/
|
|
ControlledPromise.prototype.then = function (onResolve, onReject) {
|
|
var returnPromise = new ControlledPromise();
|
|
|
|
if (onResolve) {
|
|
this.resolveHandlers.push(function (resolveWith) {
|
|
var chainResult = onResolve(resolveWith);
|
|
if (chainResult && chainResult.then) {
|
|
// chainResult is a promise, resolve when it resolves.
|
|
chainResult.then(function (pipedResult) {
|
|
return returnPromise.resolve(pipedResult);
|
|
});
|
|
} else {
|
|
returnPromise.resolve(chainResult);
|
|
}
|
|
});
|
|
}
|
|
|
|
if (onReject) {
|
|
this.rejectHandlers.push(function (rejectWith) {
|
|
var chainResult = onReject(rejectWith);
|
|
if (chainResult && chainResult.then) {
|
|
chainResult.then(function (pipedResult) {
|
|
returnPromise.reject(pipedResult);
|
|
});
|
|
} else {
|
|
returnPromise.reject(chainResult);
|
|
}
|
|
});
|
|
}
|
|
|
|
return returnPromise;
|
|
};
|
|
|
|
return ControlledPromise;
|
|
|
|
}
|
|
);
|