43 lines
1.3 KiB
JavaScript
43 lines
1.3 KiB
JavaScript
import DataTile from '../../../../../src/ol/DataTile.js';
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import DataTileSource from '../../../../../src/ol/source/DataTile.js';
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import TileState from '../../../../../src/ol/TileState.js';
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describe('ol.source.DataTile', function () {
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/** @type {DataTileSource} */
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let source;
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beforeEach(function () {
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const loader = function (z, x, y) {
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return new Promise((resolve) => {
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const canvas = document.createElement('canvas');
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canvas.width = 256;
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canvas.height = 256;
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const context = canvas.getContext('2d');
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// encode tile coordinate in rgb
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context.fillStyle = `rgb(${z}, ${x % 255}, ${y % 255})`;
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context.fillRect(0, 0, 256, 256);
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resolve(context.getImageData(0, 0, 256, 256).data);
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});
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};
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source = new DataTileSource({
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loader: loader,
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});
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});
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describe('#getTile()', function () {
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it('gets tiles and fires a tileloadend event', function (done) {
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const tile = source.getTile(3, 2, 1);
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expect(tile).to.be.a(DataTile);
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expect(tile.state).to.be(TileState.IDLE);
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source.on('tileloadend', () => {
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expect(tile.state).to.be(TileState.LOADED);
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// decode tile coordinate from rgb
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expect(Array.from(tile.getData().slice(0, 3))).to.eql([3, 2, 1]);
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done();
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});
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tile.load();
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});
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});
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});
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