/*****************************************************************************
 * Open MCT Web, Copyright (c) 2009-2015, 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
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 *****************************************************************************/

define(
    ['../../src/controllers/TimelineGanttController'],
    function (TimelineGanttController) {

        var TEST_MAX_OFFSCREEN = 50;

        describe("The timeline Gantt bar controller", function () {
            var mockTimespan,
                testScroll,
                mockToPixels,
                controller;

            // Shorthands for passing these arguments to the controller
            function width() {
                return controller.width(
                    mockTimespan,
                    testScroll,
                    mockToPixels
                );
            }
            function left() {
                return controller.left(
                    mockTimespan,
                    testScroll,
                    mockToPixels
                );
            }


            beforeEach(function () {
                mockTimespan = jasmine.createSpyObj(
                    'timespan',
                    ['getStart', 'getEnd', 'getDuration']
                );
                testScroll = { x: 0, width: 2000 };
                mockToPixels = jasmine.createSpy('toPixels');

                mockTimespan.getStart.andReturn(100);
                mockTimespan.getDuration.andReturn(50);
                mockTimespan.getEnd.andReturn(150);

                mockToPixels.andCallFake(function (t) {
                    return t * 10;
                });

                controller = new TimelineGanttController(TEST_MAX_OFFSCREEN);
            });

            it("positions start and end points correctly on-screen", function () {
                // Test's initial conditions are nominal, so should have
                // the same return value as mockToPixels
                expect(left()).toEqual(1000);
                expect(width()).toEqual(500);
            });

            it("prevents excessive off screen values to the left", function () {
                testScroll.x = 1200;
                expect(left()).toEqual(1150);
                expect(width()).toEqual(350); // ...such that right edge is 1500
            });

            it("prevents excessive off screen values to the right", function () {
                testScroll.width = 1200;
                expect(left()).toEqual(1000);
                expect(width()).toEqual(250); // ...such that right edge is 1250
            });

            it("prevents excessive off screen values on both edges", function () {
                testScroll.x = 1100;
                testScroll.width = 200; // Visible right edge is now 1300
                expect(left()).toEqual(1050);
                expect(width()).toEqual(300); // ...such that right edge is 1350
            });



        });
    }
);