WebWorldWind/test/util/PolygonSplitter.test.js

/*
 * Copyright 2003-2006, 2009, 2017, United States Government, as represented by the Administrator of the
 * National Aeronautics and Space Administration. All rights reserved.
 *
 * The NASAWorldWind/WebWorldWind platform 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.
 */
define([
        'src/util/PolygonSplitter',
        './PolygonSplitterData.test'
    ],
    function (PolygonSplitter,
              PolygonSplitterData) {
        'use strict';

        describe('spilt polygons', function () {

            it('split a square like polygon', function () {
                var inputContours = PolygonSplitterData.simpleSquareInput;
                var expectedResult = PolygonSplitterData.simpleSquareOutput;
                var result = [];
                var doesCross = PolygonSplitter.splitContours(inputContours, result);
                expect(expectedResult).toEqual(result);
                expect(doesCross).toEqual(true);
            });

            it('split a spiral like polygon', function () {
                var inputContours = PolygonSplitterData.spiralPolyInput;
                var expectedResult = PolygonSplitterData.spiralPolyOutput;
                var result = [];
                var doesCross = PolygonSplitter.splitContours(inputContours, result);
                expect(expectedResult).toEqual(result);
                expect(doesCross).toEqual(true);
            });

            it('split a polygon over the globe ending in a concave polygon', function () {
                var inputContours = PolygonSplitterData.polygonOverTheGlobeInput;
                var expectedResult = PolygonSplitterData.polygonOverTheGlobeOutput;
                var result = [];
                var doesCross = PolygonSplitter.splitContours(inputContours, result);
                expect(expectedResult).toEqual(result);
                expect(doesCross).toEqual(true);
            });

            it('splits a polygon that contains the south pole and intersects the anti-meridian', function(){
                var inputContours = PolygonSplitterData.polygonSouthPoleAndIntersectionInput;
                var expectedResult = PolygonSplitterData.polygonSouthPoleAndIntersectionOutput;
                var result = [];
                var doesCross = PolygonSplitter.splitContours(inputContours, result);
                expect(expectedResult).toEqual(result);
                expect(doesCross).toEqual(true);
            });

            it('splits a polygon that contains the north pole and intersects the anti-meridian', function(){
                var inputContours = PolygonSplitterData.polygonNorthPoleAndIntersectionInput;
                var expectedResult = PolygonSplitterData.polygonNorthPoleAndIntersectionOutput;
                var result = [];
                var doesCross = PolygonSplitter.splitContours(inputContours, result);
                expect(expectedResult).toEqual(result);
                expect(doesCross).toEqual(true);
            });

            it('split a polygon with a hole, the hole crosses the anti-meridian', function(){
                var inputContours = PolygonSplitterData.polygonHoleInput;
                var expectedResult = PolygonSplitterData.polygonHoleOutput;
                var result = [];
                var doesCross = PolygonSplitter.splitContours(inputContours, result);
                expect(expectedResult).toEqual(result);
                expect(doesCross).toEqual(true);
            });

            it('split a polygon with a hole, the hole does not cross the anti-meridian', function(){
                var inputContours = PolygonSplitterData.polygonHole2Input;
                var expectedResult = PolygonSplitterData.polygonHole2Output;
                var result = [];
                var doesCross = PolygonSplitter.splitContours(inputContours, result);
                expect(expectedResult).toEqual(result);
                expect(doesCross).toEqual(true);
            });

            it('doesn\'t split a full sphere sector', function() {
                var inputContours = PolygonSplitterData.fullSphereSectorInput;
                var expectedResult = PolygonSplitterData.fullSphereSectorOutput;
                var result = [];
                var doesCross = PolygonSplitter.splitContours(inputContours, result);
                expect(expectedResult).toEqual(result);
                expect(doesCross).toEqual(false);
            });

        });

    });