openmct/platform/execution/test/WorkerServiceSpec.js

/*****************************************************************************
 * 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.
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 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
 * License for the specific language governing permissions and limitations
 * under the License.
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 * licenses. See the Open Source Licenses file (LICENSES.md) included with
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define(
    ["../src/WorkerService"],
    function (WorkerService) {

        describe("The worker service", function () {
            var mockWindow,
                testWorkers,
                mockWorker,
                mockSharedWorker,
                service;

            beforeEach(function () {
                mockWindow = jasmine.createSpyObj(
                    '$window',
                    ['Worker', 'SharedWorker']
                );
                testWorkers = [
                    {
                        key: 'abc',
                        scriptUrl: 'c.js',
                        bundle: { path: 'a', sources: 'b' }
                    },
                    {
                        key: 'xyz',
                        scriptUrl: 'z.js',
                        bundle: { path: 'x', sources: 'y' }
                    },
                    {
                        key: 'xyz',
                        scriptUrl: 'bad.js',
                        bundle: { path: 'bad', sources: 'bad' }
                    },
                    {
                        key: 'a-shared-worker',
                        shared: true,
                        scriptUrl: 'c.js',
                        bundle: { path: 'a', sources: 'b' }
                    }
                ];
                mockWorker = {};
                mockSharedWorker = {};

                mockWindow.Worker.andReturn(mockWorker);
                mockWindow.SharedWorker.andReturn(mockSharedWorker);

                service = new WorkerService(mockWindow, testWorkers);
            });

            it("instantiates workers at registered paths", function () {
                expect(service.run('abc')).toBe(mockWorker);
                expect(mockWindow.Worker).toHaveBeenCalledWith('a/b/c.js');
            });

            it("prefers the first worker when multiple keys are found", function () {
                expect(service.run('xyz')).toBe(mockWorker);
                expect(mockWindow.Worker).toHaveBeenCalledWith('x/y/z.js');
            });

            it("allows workers to be shared", function () {
                expect(service.run('a-shared-worker')).toBe(mockSharedWorker);
                expect(mockWindow.SharedWorker)
                    .toHaveBeenCalledWith('a/b/c.js');
            });

            it("returns undefined for unknown workers", function () {
                expect(service.run('def')).toBeUndefined();
            });

        });
    }
);