74 lines
3.1 KiB
JavaScript
74 lines
3.1 KiB
JavaScript
/*****************************************************************************
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* Open MCT Web, Copyright (c) 2014-2015, United States Government
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* as represented by the Administrator of the National Aeronautics and Space
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* Administration. All rights reserved.
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*
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* Open MCT Web is licensed under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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* http://www.apache.org/licenses/LICENSE-2.0.
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations
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* under the License.
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*
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* Open MCT Web includes source code licensed under additional open source
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* licenses. See the Open Source Licenses file (LICENSES.md) included with
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* this source code distribution or the Licensing information page available
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* at runtime from the About dialog for additional information.
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*****************************************************************************/
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/*global define,Promise,describe,it,expect,beforeEach,waitsFor,jasmine*/
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define(
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["../../src/services/Throttle"],
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function (Throttle) {
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"use strict";
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describe("The 'throttle' service", function () {
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var throttle,
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mockTimeout,
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mockFn,
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mockPromise;
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beforeEach(function () {
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mockTimeout = jasmine.createSpy("$timeout");
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mockPromise = jasmine.createSpyObj("promise", ["then"]);
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mockFn = jasmine.createSpy("fn");
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mockTimeout.andReturn(mockPromise);
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throttle = new Throttle(mockTimeout);
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});
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it("provides functions which run on a timeout", function () {
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var throttled = throttle(mockFn);
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// Verify precondition: Not called at throttle-time
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expect(mockTimeout).not.toHaveBeenCalled();
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expect(throttled()).toEqual(mockPromise);
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expect(mockFn).not.toHaveBeenCalled();
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expect(mockTimeout)
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.toHaveBeenCalledWith(jasmine.any(Function), 0, false);
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});
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it("schedules only one timeout at a time", function () {
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var throttled = throttle(mockFn);
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throttled();
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throttled();
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throttled();
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expect(mockTimeout.calls.length).toEqual(1);
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});
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it("schedules additional invocations after resolution", function () {
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var throttled = throttle(mockFn);
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throttled();
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mockTimeout.mostRecentCall.args[0](); // Resolve timeout
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throttled();
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mockTimeout.mostRecentCall.args[0]();
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throttled();
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mockTimeout.mostRecentCall.args[0]();
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expect(mockTimeout.calls.length).toEqual(3);
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});
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});
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}
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);
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