b52d283641
The ol.geom.SharedVertices structure represents a flattened array of vertex coordinates. This is intended to support optimal WebGL rendering.
104 lines
3.0 KiB
JavaScript
104 lines
3.0 KiB
JavaScript
goog.provide('ol.test.geom.LineString');
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describe('ol.geom.LineString', function() {
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describe('constructor', function() {
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it('creates a linestring from an array', function() {
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var line = new ol.geom.LineString([[10, 20], [30, 40]]);
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expect(line).toBeA(ol.geom.LineString);
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expect(line).toBeA(ol.geom.Geometry);
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});
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it('throws when given mismatched dimension', function() {
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expect(function() {
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var line = new ol.geom.LineString([[10, 20], [30, 40, 50]]);
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}).toThrow();
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});
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it('accepts shared vertices', function() {
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var vertices = new ol.geom.SharedVertices();
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var l1 = new ol.geom.LineString([[10, 20], [30, 40]], vertices);
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var l2 = new ol.geom.LineString([[50, 60], [70, 80]], vertices);
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expect(l1.getCoordinates()).toEqual([[10, 20], [30, 40]]);
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expect(l2.getCoordinates()).toEqual([[50, 60], [70, 80]]);
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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 line = new ol.geom.LineString([[10, 20], [30, 40]]);
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expect(line.dimension).toBe(2);
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});
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it('can be 3', function() {
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var line = new ol.geom.LineString([[10, 20, 30], [40, 50, 60]]);
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expect(line.dimension).toBe(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 line = new ol.geom.LineString([[10, 20], [20, 30], [30, 40]]);
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var bounds = line.getBounds();
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expect(bounds.minX).toBe(10);
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expect(bounds.minY).toBe(20);
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expect(bounds.maxX).toBe(30);
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expect(bounds.maxY).toBe(40);
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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 line = new ol.geom.LineString([[10, 20], [30, 40]]);
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expect(line.getCoordinates()).toEqual([[10, 20], [30, 40]]);
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});
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});
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describe('#getSharedId()', function() {
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it('returns identifiers', function() {
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var vertices = new ol.geom.SharedVertices();
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var l1 = new ol.geom.LineString([[10, 20], [30, 40]], vertices);
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var l2 = new ol.geom.LineString(
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[[50, 60], [70, 80], [90, 100]], vertices);
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var id1 = l1.getSharedId();
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var id2 = l2.getSharedId();
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expect(vertices.coordinates).toEqual(
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[10, 20, 30, 40, 50, 60, 70, 80, 90, 100]);
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expect(vertices.getStart(id1)).toBe(0);
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expect(vertices.getCount(id1)).toBe(2);
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expect(vertices.get(id1, 0, 0)).toBe(10);
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expect(vertices.get(id1, 0, 1)).toBe(20);
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expect(vertices.get(id1, 1, 0)).toBe(30);
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expect(vertices.get(id1, 1, 1)).toBe(40);
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expect(vertices.getStart(id2)).toBe(4);
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expect(vertices.getCount(id2)).toBe(3);
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expect(vertices.get(id2, 0, 0)).toBe(50);
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expect(vertices.get(id2, 0, 1)).toBe(60);
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expect(vertices.get(id2, 1, 0)).toBe(70);
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expect(vertices.get(id2, 1, 1)).toBe(80);
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expect(vertices.get(id2, 2, 0)).toBe(90);
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expect(vertices.get(id2, 2, 1)).toBe(100);
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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.LineString');
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goog.require('ol.geom.SharedVertices');
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