openmct/platform/exporters/ExportServiceSpec.js

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 * 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.
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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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/*global define,describe,it,expect,beforeEach,waitsFor,jasmine,Blob,FileReader*/

define(
    ["./ExportService", "csv"],
    function (ExportService, CSV) {
        'use strict';

        describe("ExportService", function () {
            var mockSaveAs,
                testRows,
                csvContents,
                exportService;

            function finishedReadingCSV() {
                return !!csvContents;
            }

            beforeEach(function () {
                csvContents = undefined;
                testRows = [
                    { a: 1, b: 2, c: 3 },
                    { a: 4, b: 5, c: 6 },
                    { a: 7, b: 8, c: 9 }
                ];
                mockSaveAs = jasmine.createSpy('saveAs');
                mockSaveAs.andCallFake(function (blob) {
                    var reader = new FileReader();
                    reader.onloadend = function () {
                       csvContents = new CSV(reader.result).parse();
                    };
                    reader.readAsText(blob);
                });
                exportService = new ExportService(mockSaveAs);
            });

            describe("#exportCSV(rows)", function () {
                beforeEach(function () {
                    exportService.exportCSV(testRows);
                    waitsFor(finishedReadingCSV);
                });

                it("triggers saving of a file", function () {
                    expect(mockSaveAs).toHaveBeenCalledWith(
                        jasmine.any(Blob),
                        jasmine.any(String)
                    );
                });

                it("includes headers from the data set", function () {
                    expect(csvContents[0]).toEqual([ 'a', 'b', 'c' ]);
                });
            });

        });

    }
);