Tim Schaub
95 lines
2.6 KiB
JavaScript
95 lines
2.6 KiB
JavaScript
goog.provide('ol.test.geom.Polygon');
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describe('ol.geom.Polygon', function() {
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var outer = [[0, 0], [10, 0], [10, 10], [0, 10], [0, 0]],
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inner1 = [[1, 1], [2, 1], [2, 2], [1, 2], [1, 1]],
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inner2 = [[8, 8], [9, 8], [9, 9], [8, 9], [8, 8]];
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describe('constructor', function() {
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it('creates a polygon from an array', function() {
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var poly = new ol.geom.Polygon([outer, inner1, inner2]);
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expect(poly).to.be.a(ol.geom.Polygon);
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expect(poly).to.be.a(ol.geom.Geometry);
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});
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});
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describe('#rings', function() {
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it('is an array of LinearRing', function() {
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var poly = new ol.geom.Polygon([outer, inner1, inner2]);
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expect(poly.rings.length).to.be(3);
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expect(poly.rings[0]).to.be.a(ol.geom.LinearRing);
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expect(poly.rings[1]).to.be.a(ol.geom.LinearRing);
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expect(poly.rings[2]).to.be.a(ol.geom.LinearRing);
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});
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var isClockwise = ol.geom.LinearRing.isClockwise;
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it('forces exterior ring to be clockwise', function() {
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var outer = [[0, 0], [10, 0], [10, 10], [0, 10], [0, 0]];
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expect(isClockwise(outer)).to.be(false);
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var poly = new ol.geom.Polygon([outer]);
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var ring = poly.rings[0];
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expect(isClockwise(ring.getCoordinates())).to.be(true);
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});
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it('forces interior ring to be counter-clockwise', function() {
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var outer = [[0, 0], [10, 0], [10, 10], [0, 10], [0, 0]];
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var inner = [[2, 2], [2, 8], [8, 8], [8, 2], [2, 2]];
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expect(isClockwise(inner)).to.be(true);
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var poly = new ol.geom.Polygon([outer, inner]);
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var ring = poly.rings[1];
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expect(isClockwise(ring.getCoordinates())).to.be(false);
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});
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});
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describe('#dimension', function() {
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it('can be 2', function() {
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var poly = new ol.geom.Polygon([outer, inner1, inner2]);
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expect(poly.dimension).to.be(2);
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});
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it('can be 3', function() {
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var poly = new ol.geom.Polygon([[[10, 20, 30], [40, 50, 60]]]);
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expect(poly.dimension).to.be(3);
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});
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});
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describe('#getBounds()', function() {
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it('returns the bounding extent', function() {
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var poly = new ol.geom.Polygon([outer, inner1, inner2]);
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var bounds = poly.getBounds();
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expect(bounds[0]).to.be(0);
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expect(bounds[2]).to.be(10);
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expect(bounds[1]).to.be(0);
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expect(bounds[3]).to.be(10);
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});
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});
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describe('#getCoordinates()', function() {
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it('returns an array', function() {
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var poly = new ol.geom.Polygon([outer, inner1, inner2]);
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expect(poly.getCoordinates()).to.eql([outer, inner1, inner2]);
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});
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});
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});
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goog.require('ol.geom.Geometry');
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goog.require('ol.geom.LinearRing');
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goog.require('ol.geom.Polygon');
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