32 lines
1.1 KiB
JavaScript
32 lines
1.1 KiB
JavaScript
import CanvasReplayGroup from '../../../../../src/ol/render/canvas/ReplayGroup.js';
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describe('ol.render.canvas.ReplayGroup', function() {
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describe('#getCircleArray_', function() {
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it('creates an array with a pixelated circle marked with true', function() {
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const radius = 10;
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const minRadiusSq = Math.pow(radius - Math.SQRT2, 2);
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const maxRadiusSq = Math.pow(radius + Math.SQRT2, 2);
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const circleArray = CanvasReplayGroup.getCircleArray_(radius);
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const size = radius * 2 + 1;
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expect(circleArray.length).to.be(size);
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for (let i = 0; i < size; i++) {
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expect(circleArray[i].length).to.be(size);
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for (let j = 0; j < size; j++) {
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const dx = Math.abs(radius - i);
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const dy = Math.abs(radius - j);
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const distanceSq = Math.pow(dx, 2) + Math.pow(dy, 2);
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if (circleArray[i][j] === true) {
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expect(distanceSq).to.be.within(0, maxRadiusSq);
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} else {
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expect(distanceSq).to.be.within(minRadiusSq, Infinity);
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}
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}
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}
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});
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});
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});
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