652 lines
20 KiB
JavaScript
652 lines
20 KiB
JavaScript
goog.provide('ol.test.TileGrid');
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describe('ol.tilegrid.TileGrid', function() {
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var extent;
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var resolutions;
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var origin;
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var origins;
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var tileSize;
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beforeEach(function() {
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resolutions = [1000, 500, 250, 100];
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extent = [0, 0, 100000, 100000];
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origin = [0, 0];
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origins = [];
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tileSize = 100;
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});
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describe('create valid', function() {
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it('does not throw an exception', function() {
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expect(function() {
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return new ol.tilegrid.TileGrid({
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resolutions: resolutions,
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extent: extent,
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origin: origin,
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tileSize: tileSize
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});
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}).not.to.throwException();
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});
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});
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describe('create with duplicate resolutions', function() {
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it('throws an exception', function() {
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expect(function() {
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return new ol.tilegrid.TileGrid({
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resolutions: [100, 50, 50, 25, 10],
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extent: extent,
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origin: origin,
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tileSize: tileSize
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});
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}).to.throwException();
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});
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});
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describe('create with out of order resolutions', function() {
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it('throws an exception', function() {
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var resolutions = [100, 25, 50, 10];
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expect(function() {
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return new ol.tilegrid.TileGrid({
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resolutions: resolutions,
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extent: extent,
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origin: origin,
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tileSize: tileSize
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});
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}).to.throwException();
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});
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});
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describe('create with multiple origins', function() {
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it('does not throw an exception', function() {
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expect(function() {
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return new ol.tilegrid.TileGrid({
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resolutions: [100, 50, 25, 10],
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extent: extent,
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origins: [origin, origin, origin, origin],
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tileSize: tileSize
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});
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}).not.to.throwException();
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});
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});
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describe('create with both origin and multiple origins', function() {
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it('throws an exception', function() {
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expect(function() {
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return new ol.tilegrid.TileGrid({
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resolutions: [100, 50, 25, 10],
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extent: extent,
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origins: [origin, origin, origin, origin],
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origin: origin,
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tileSize: tileSize
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});
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}).to.throwException();
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});
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});
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describe('create with too few origins', function() {
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it('throws an exception', function() {
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expect(function() {
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return new ol.tilegrid.TileGrid({
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resolutions: [100, 50, 25, 10],
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extent: extent,
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origins: [origin, origin, origin],
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tileSize: tileSize
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});
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}).to.throwException();
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});
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});
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describe('create with too many origins', function() {
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it('throws an exception', function() {
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expect(function() {
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return new ol.tilegrid.TileGrid({
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resolutions: [100, 50, 25, 10],
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extent: extent,
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origins: [origin, origin, origin, origin, origin],
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tileSize: tileSize
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});
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}).to.throwException();
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});
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});
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describe('create with multiple tileSizes', function() {
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it('does not throw an exception', function() {
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expect(function() {
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return new ol.tilegrid.TileGrid({
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resolutions: [100, 50, 25, 10],
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extent: extent,
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tileSizes: [tileSize, tileSize, tileSize, tileSize],
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origin: origin
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});
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}).not.to.throwException();
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});
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});
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describe('create with both tileSize and multiple tileSizes', function() {
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it('throws an exception', function() {
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expect(function() {
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return new ol.tilegrid.TileGrid({
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resolutions: [100, 50, 25, 10],
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extent: extent,
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tileSizes: [tileSize, tileSize, tileSize, tileSize],
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tileSize: tileSize,
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origin: origin
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});
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}).to.throwException();
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});
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});
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describe('create with too few tileSizes', function() {
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it('throws an exception', function() {
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expect(function() {
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return new ol.tilegrid.TileGrid({
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resolutions: [100, 50, 25, 10],
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extent: extent,
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tileSizes: [tileSize, tileSize, tileSize],
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origin: origin
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});
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}).to.throwException();
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});
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});
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describe('create with too many tileSizes', function() {
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it('throws an exception', function() {
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expect(function() {
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return new ol.tilegrid.TileGrid({
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resolutions: [100, 50, 25, 10],
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extent: extent,
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tileSizes: [tileSize, tileSize, tileSize, tileSize, tileSize],
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origin: origin
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});
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}).to.throwException();
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});
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});
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describe('createForProjection', function() {
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it('allows easier creation of a tile grid', function() {
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var projection = ol.proj.get('EPSG:3857');
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var grid = ol.tilegrid.createForProjection(projection);
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expect(grid).to.be.a(ol.tilegrid.TileGrid);
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var resolutions = grid.getResolutions();
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expect(resolutions.length).to.be(ol.DEFAULT_MAX_ZOOM + 1);
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});
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it('accepts a number of zoom levels', function() {
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var projection = ol.proj.get('EPSG:3857');
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var grid = ol.tilegrid.createForProjection(projection, 18);
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expect(grid).to.be.a(ol.tilegrid.TileGrid);
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var resolutions = grid.getResolutions();
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expect(resolutions.length).to.be(19);
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});
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it('accepts a big number of zoom levels', function() {
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var projection = ol.proj.get('EPSG:3857');
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var grid = ol.tilegrid.createForProjection(projection, 23);
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expect(grid).to.be.a(ol.tilegrid.TileGrid);
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var resolutions = grid.getResolutions();
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expect(resolutions.length).to.be(24);
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});
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it('works for projections unknown to the client', function() {
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var projection = new ol.proj.Projection(
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{code: 'EPSG:31287', units: 'm'});
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var grid = ol.tilegrid.createForProjection(projection);
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var resolutions = grid.getResolutions();
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expect(resolutions[5]).to.be(
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360 * ol.proj.METERS_PER_UNIT[ol.proj.Units.DEGREES] /
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ol.DEFAULT_TILE_SIZE / Math.pow(2, 5));
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});
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});
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describe('getForProjection', function() {
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it('gets the default tile grid for a projection', function() {
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var projection = ol.proj.get('EPSG:3857');
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var grid = ol.tilegrid.getForProjection(projection);
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expect(grid).to.be.a(ol.tilegrid.TileGrid);
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var resolutions = grid.getResolutions();
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expect(resolutions.length).to.be(ol.DEFAULT_MAX_ZOOM + 1);
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expect(grid.getTileSize()).to.eql(256);
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});
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it('stores the default tile grid on a projection', function() {
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var projection = ol.proj.get('EPSG:3857');
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var grid = ol.tilegrid.getForProjection(projection);
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var gridAgain = ol.tilegrid.getForProjection(projection);
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expect(grid).to.be(gridAgain);
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});
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});
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describe('getTileCoordFromCoordAndZ', function() {
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describe('Y North, X East', function() {
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it('returns the expected TileCoord', function() {
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origin = [0, 0];
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var tileGrid = new ol.tilegrid.TileGrid({
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resolutions: resolutions,
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extent: extent,
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origin: origin,
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tileSize: tileSize
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});
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var tileCoord;
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tileCoord = tileGrid.getTileCoordForCoordAndZ([0, 0], 3);
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expect(tileCoord.z).to.eql(3);
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expect(tileCoord.x).to.eql(0);
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expect(tileCoord.y).to.eql(0);
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tileCoord = tileGrid.getTileCoordForCoordAndZ([0, 100000], 3);
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expect(tileCoord.z).to.eql(3);
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expect(tileCoord.x).to.eql(0);
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expect(tileCoord.y).to.eql(10);
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tileCoord = tileGrid.getTileCoordForCoordAndZ([100000, 0], 3);
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expect(tileCoord.z).to.eql(3);
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expect(tileCoord.x).to.eql(10);
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expect(tileCoord.y).to.eql(0);
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tileCoord = tileGrid.getTileCoordForCoordAndZ([100000, 100000], 3);
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expect(tileCoord.z).to.eql(3);
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expect(tileCoord.x).to.eql(10);
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expect(tileCoord.y).to.eql(10);
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});
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});
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describe('Y South, X East', function() {
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it('returns the expected TileCoord', function() {
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origin = [0, 100000];
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var tileGrid = new ol.tilegrid.TileGrid({
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resolutions: resolutions,
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extent: extent,
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origin: origin,
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tileSize: tileSize
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});
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var tileCoord;
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tileCoord = tileGrid.getTileCoordForCoordAndZ([0, 0], 3);
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expect(tileCoord.z).to.eql(3);
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expect(tileCoord.x).to.eql(0);
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expect(tileCoord.y).to.eql(-10);
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tileCoord = tileGrid.getTileCoordForCoordAndZ([0, 100000], 3);
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expect(tileCoord.z).to.eql(3);
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expect(tileCoord.x).to.eql(0);
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expect(tileCoord.y).to.eql(0);
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tileCoord = tileGrid.getTileCoordForCoordAndZ([100000, 0], 3);
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expect(tileCoord.z).to.eql(3);
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expect(tileCoord.x).to.eql(10);
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expect(tileCoord.y).to.eql(-10);
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tileCoord = tileGrid.getTileCoordForCoordAndZ([100000, 100000], 3);
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expect(tileCoord.z).to.eql(3);
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expect(tileCoord.x).to.eql(10);
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expect(tileCoord.y).to.eql(0);
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});
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});
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});
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describe('getTileCoordForCoordAndResolution', function() {
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it('returns the expected TileCoord', function() {
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var tileSize = 256;
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var tileGrid = new ol.tilegrid.TileGrid({
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resolutions: [10],
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extent: extent,
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origin: origin,
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tileSize: tileSize
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});
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var coordinate;
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var tileCoord;
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// gets the first tile at the origin
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coordinate = [0, 0];
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tileCoord = tileGrid.getTileCoordForCoordAndResolution(coordinate, 10);
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expect(tileCoord.z).to.eql(0);
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expect(tileCoord.x).to.eql(0);
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expect(tileCoord.y).to.eql(0);
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// gets one tile northwest of the origin
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coordinate = [-1280, 1280];
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tileCoord = tileGrid.getTileCoordForCoordAndResolution(coordinate, 10);
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expect(tileCoord.z).to.eql(0);
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expect(tileCoord.x).to.eql(-1);
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expect(tileCoord.y).to.eql(0);
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// gets one tile northeast of the origin
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coordinate = [1280, 1280];
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tileCoord = tileGrid.getTileCoordForCoordAndResolution(coordinate, 10);
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expect(tileCoord.z).to.eql(0);
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expect(tileCoord.x).to.eql(0);
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expect(tileCoord.y).to.eql(0);
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// gets one tile southeast of the origin
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coordinate = [1280, -1280];
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tileCoord = tileGrid.getTileCoordForCoordAndResolution(coordinate, 10);
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expect(tileCoord.z).to.eql(0);
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expect(tileCoord.x).to.eql(0);
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expect(tileCoord.y).to.eql(-1);
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// gets one tile southwest of the origin
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coordinate = [-1280, -1280];
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tileCoord = tileGrid.getTileCoordForCoordAndResolution(coordinate, 10);
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expect(tileCoord.z).to.eql(0);
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expect(tileCoord.x).to.eql(-1);
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expect(tileCoord.y).to.eql(-1);
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// gets the tile to the east when on the edge
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coordinate = [2560, -1280];
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tileCoord = tileGrid.getTileCoordForCoordAndResolution(coordinate, 10);
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expect(tileCoord.z).to.eql(0);
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expect(tileCoord.x).to.eql(1);
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expect(tileCoord.y).to.eql(-1);
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// gets the tile to the north when on the edge
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coordinate = [1280, -2560];
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tileCoord = tileGrid.getTileCoordForCoordAndResolution(coordinate, 10);
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expect(tileCoord.z).to.eql(0);
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expect(tileCoord.x).to.eql(0);
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expect(tileCoord.y).to.eql(-1);
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// pixels are top aligned to the origin
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coordinate = [1280, -2559.999];
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tileCoord = tileGrid.getTileCoordForCoordAndResolution(coordinate, 10);
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expect(tileCoord.z).to.eql(0);
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expect(tileCoord.x).to.eql(0);
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expect(tileCoord.y).to.eql(-1);
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// pixels are left aligned to the origin
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coordinate = [2559.999, -1280];
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tileCoord = tileGrid.getTileCoordForCoordAndResolution(coordinate, 10);
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expect(tileCoord.z).to.eql(0);
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expect(tileCoord.x).to.eql(0);
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expect(tileCoord.y).to.eql(-1);
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});
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});
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describe('getTileCoordForXYAndResolution_', function() {
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it('returns higher tile coord for intersections by default', function() {
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var tileGrid = new ol.tilegrid.TileGrid({
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resolutions: resolutions,
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extent: extent,
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origin: origin,
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tileSize: tileSize
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});
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var tileCoord;
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// gets higher tile for edge intersection
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tileCoord = tileGrid.getTileCoordForXYAndResolution_(
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0, 0, 100, false);
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expect(tileCoord.z).to.eql(3);
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expect(tileCoord.x).to.eql(0);
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expect(tileCoord.y).to.eql(0);
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// gets higher tile for edge intersection
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tileCoord = tileGrid.getTileCoordForXYAndResolution_(
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100000, 100000, 100, false);
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expect(tileCoord.z).to.eql(3);
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expect(tileCoord.x).to.eql(10);
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expect(tileCoord.y).to.eql(10);
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});
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it('handles alt intersection policy', function() {
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var tileGrid = new ol.tilegrid.TileGrid({
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resolutions: resolutions,
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extent: extent,
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origin: origin,
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tileSize: tileSize
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});
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var tileCoord;
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// can get lower tile for edge intersection
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tileCoord = tileGrid.getTileCoordForXYAndResolution_(
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0, 0, 100, true);
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expect(tileCoord.z).to.eql(3);
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expect(tileCoord.x).to.eql(-1);
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expect(tileCoord.y).to.eql(-1);
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// gets higher tile for edge intersection
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tileCoord = tileGrid.getTileCoordForXYAndResolution_(
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100000, 100000, 100, true);
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expect(tileCoord.z).to.eql(3);
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expect(tileCoord.x).to.eql(9);
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expect(tileCoord.y).to.eql(9);
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});
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});
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describe('getTileCoordCenter', function() {
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it('returns the expected center', function() {
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var tileGrid = new ol.tilegrid.TileGrid({
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resolutions: resolutions,
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extent: extent,
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origin: origin,
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tileSize: tileSize
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});
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var center;
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center = tileGrid.getTileCoordCenter(new ol.TileCoord(0, 0, 0));
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expect(center[0]).to.eql(50000);
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expect(center[1]).to.eql(50000);
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center = tileGrid.getTileCoordCenter(new ol.TileCoord(3, 0, 0));
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expect(center[0]).to.eql(5000);
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expect(center[1]).to.eql(5000);
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center = tileGrid.getTileCoordCenter(new ol.TileCoord(3, 9, 9));
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expect(center[0]).to.eql(95000);
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expect(center[1]).to.eql(95000);
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});
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});
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describe('getTileCoordExtent', function() {
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it('returns the expected extend', function() {
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var tileGrid = new ol.tilegrid.TileGrid({
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resolutions: resolutions,
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extent: extent,
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origin: origin,
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tileSize: tileSize
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});
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var tileCoordExtent;
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tileCoordExtent = tileGrid.getTileCoordExtent(new ol.TileCoord(0, 0, 0));
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expect(tileCoordExtent[0]).to.eql(0);
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expect(tileCoordExtent[1]).to.eql(0);
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expect(tileCoordExtent[2]).to.eql(100000);
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expect(tileCoordExtent[3]).to.eql(100000);
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tileCoordExtent = tileGrid.getTileCoordExtent(new ol.TileCoord(3, 9, 0));
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expect(tileCoordExtent[0]).to.eql(90000);
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expect(tileCoordExtent[1]).to.eql(0);
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expect(tileCoordExtent[2]).to.eql(100000);
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expect(tileCoordExtent[3]).to.eql(10000);
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tileCoordExtent = tileGrid.getTileCoordExtent(new ol.TileCoord(3, 0, 9));
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expect(tileCoordExtent[0]).to.eql(0);
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expect(tileCoordExtent[1]).to.eql(90000);
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expect(tileCoordExtent[2]).to.eql(10000);
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expect(tileCoordExtent[3]).to.eql(100000);
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});
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});
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describe('getTileRangeForExtentAndResolution', function() {
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it('returns the expected TileRange', function() {
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var tileGrid = new ol.tilegrid.TileGrid({
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resolutions: resolutions,
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extent: extent,
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origin: origin,
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tileSize: tileSize
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});
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var tileRange;
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tileRange = tileGrid.getTileRangeForExtentAndResolution(extent,
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resolutions[0]);
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expect(tileRange.minY).to.eql(0);
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expect(tileRange.minX).to.eql(0);
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expect(tileRange.maxX).to.eql(0);
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expect(tileRange.maxY).to.eql(0);
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tileRange = tileGrid.getTileRangeForExtentAndResolution(extent,
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resolutions[1]);
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expect(tileRange.minX).to.eql(0);
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expect(tileRange.minY).to.eql(0);
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expect(tileRange.maxX).to.eql(1);
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expect(tileRange.maxY).to.eql(1);
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tileRange = tileGrid.getTileRangeForExtentAndResolution(extent,
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resolutions[2]);
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expect(tileRange.minX).to.eql(0);
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expect(tileRange.minY).to.eql(0);
|
|
expect(tileRange.maxX).to.eql(3);
|
|
expect(tileRange.maxY).to.eql(3);
|
|
|
|
tileRange = tileGrid.getTileRangeForExtentAndResolution(extent,
|
|
resolutions[3]);
|
|
expect(tileRange.minX).to.eql(0);
|
|
expect(tileRange.minY).to.eql(0);
|
|
expect(tileRange.maxX).to.eql(9);
|
|
expect(tileRange.maxY).to.eql(9);
|
|
});
|
|
});
|
|
|
|
describe('getTileRangeForExtentAndZ', function() {
|
|
it('returns the expected TileRange', function() {
|
|
var tileGrid = new ol.tilegrid.TileGrid({
|
|
resolutions: resolutions,
|
|
extent: extent,
|
|
origin: origin,
|
|
tileSize: tileSize
|
|
});
|
|
var e = [45000, 5000, 55000, 15000];
|
|
var tileRange;
|
|
|
|
tileRange = tileGrid.getTileRangeForExtentAndZ(e, 0);
|
|
expect(tileRange.minY).to.eql(0);
|
|
expect(tileRange.minX).to.eql(0);
|
|
expect(tileRange.maxX).to.eql(0);
|
|
expect(tileRange.maxY).to.eql(0);
|
|
|
|
tileRange = tileGrid.getTileRangeForExtentAndZ(e, 1);
|
|
expect(tileRange.minX).to.eql(0);
|
|
expect(tileRange.minY).to.eql(0);
|
|
expect(tileRange.maxX).to.eql(1);
|
|
expect(tileRange.maxY).to.eql(0);
|
|
|
|
tileRange = tileGrid.getTileRangeForExtentAndZ(e, 2);
|
|
expect(tileRange.minX).to.eql(1);
|
|
expect(tileRange.minY).to.eql(0);
|
|
expect(tileRange.maxX).to.eql(2);
|
|
expect(tileRange.maxY).to.eql(0);
|
|
|
|
tileRange = tileGrid.getTileRangeForExtentAndZ(e, 3);
|
|
expect(tileRange.minX).to.eql(4);
|
|
expect(tileRange.minY).to.eql(0);
|
|
expect(tileRange.maxX).to.eql(5);
|
|
expect(tileRange.maxY).to.eql(1);
|
|
});
|
|
});
|
|
|
|
describe('forEachTileCoordParentTileRange', function() {
|
|
it('iterates as expected', function() {
|
|
var tileGrid = new ol.tilegrid.TileGrid({
|
|
resolutions: resolutions,
|
|
extent: extent,
|
|
origin: origin,
|
|
tileSize: tileSize
|
|
});
|
|
var zs = [], tileRanges = [];
|
|
|
|
tileGrid.forEachTileCoordParentTileRange(
|
|
new ol.TileCoord(3, 7, 3),
|
|
function(z, tileRange) {
|
|
zs.push(z);
|
|
tileRanges.push(tileRange);
|
|
return false;
|
|
});
|
|
|
|
expect(zs.length).to.eql(3);
|
|
expect(tileRanges.length).to.eql(3);
|
|
|
|
expect(zs[0]).to.eql(2);
|
|
expect(tileRanges[0].minX).to.eql(2);
|
|
expect(tileRanges[0].minY).to.eql(1);
|
|
expect(tileRanges[0].maxX).to.eql(3);
|
|
expect(tileRanges[0].maxY).to.eql(1);
|
|
|
|
expect(zs[1]).to.eql(1);
|
|
expect(tileRanges[1].minX).to.eql(1);
|
|
expect(tileRanges[1].minY).to.eql(0);
|
|
expect(tileRanges[1].maxX).to.eql(1);
|
|
expect(tileRanges[1].maxY).to.eql(0);
|
|
|
|
expect(zs[2]).to.eql(0);
|
|
expect(tileRanges[2].minX).to.eql(0);
|
|
expect(tileRanges[2].minY).to.eql(0);
|
|
expect(tileRanges[2].maxX).to.eql(0);
|
|
expect(tileRanges[2].maxY).to.eql(0);
|
|
});
|
|
});
|
|
|
|
describe('getZForResolution (exact)', function() {
|
|
it('returns the expected z value', function() {
|
|
var tileGrid = new ol.tilegrid.TileGrid({
|
|
resolutions: resolutions,
|
|
extent: extent,
|
|
origin: origin,
|
|
tileSize: tileSize
|
|
});
|
|
|
|
expect(tileGrid.getZForResolution(1000)).to.eql(0);
|
|
expect(tileGrid.getZForResolution(500)).to.eql(1);
|
|
expect(tileGrid.getZForResolution(250)).to.eql(2);
|
|
expect(tileGrid.getZForResolution(100)).to.eql(3);
|
|
});
|
|
});
|
|
|
|
describe('getZForResolution (approcimate)', function() {
|
|
it('returns the expected z value', function() {
|
|
var tileGrid = new ol.tilegrid.TileGrid({
|
|
resolutions: resolutions,
|
|
extent: extent,
|
|
origin: origin,
|
|
tileSize: tileSize
|
|
});
|
|
|
|
expect(tileGrid.getZForResolution(2000)).to.eql(0);
|
|
expect(tileGrid.getZForResolution(1000)).to.eql(0);
|
|
expect(tileGrid.getZForResolution(900)).to.eql(0);
|
|
expect(tileGrid.getZForResolution(750)).to.eql(1);
|
|
expect(tileGrid.getZForResolution(625)).to.eql(1);
|
|
expect(tileGrid.getZForResolution(500)).to.eql(1);
|
|
expect(tileGrid.getZForResolution(475)).to.eql(1);
|
|
expect(tileGrid.getZForResolution(375)).to.eql(2);
|
|
expect(tileGrid.getZForResolution(250)).to.eql(2);
|
|
expect(tileGrid.getZForResolution(200)).to.eql(2);
|
|
expect(tileGrid.getZForResolution(125)).to.eql(3);
|
|
expect(tileGrid.getZForResolution(100)).to.eql(3);
|
|
expect(tileGrid.getZForResolution(50)).to.eql(3);
|
|
});
|
|
});
|
|
|
|
});
|
|
|
|
goog.require('ol.Coordinate');
|
|
goog.require('ol.TileCoord');
|
|
goog.require('ol.proj');
|
|
goog.require('ol.proj.METERS_PER_UNIT');
|
|
goog.require('ol.proj.Projection');
|
|
goog.require('ol.proj.Units');
|
|
goog.require('ol.tilegrid.TileGrid');
|