91 lines
2.6 KiB
JavaScript
91 lines
2.6 KiB
JavaScript
import WebGLArrayBuffer, {
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getArrayClassForType,
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} from '../../../../../src/ol/webgl/Buffer.js';
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import {
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ARRAY_BUFFER,
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ELEMENT_ARRAY_BUFFER,
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STATIC_DRAW,
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STREAM_DRAW,
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} from '../../../../../src/ol/webgl.js';
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describe('ol.webgl.Buffer', function () {
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describe('constructor', function () {
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it('sets the default usage when not specified', function () {
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const b = new WebGLArrayBuffer(ARRAY_BUFFER);
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expect(b.getUsage()).to.be(STATIC_DRAW);
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});
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it('sets the given usage when specified', function () {
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const b = new WebGLArrayBuffer(ARRAY_BUFFER, STREAM_DRAW);
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expect(b.getUsage()).to.be(STREAM_DRAW);
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});
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it('raises an error if an incorrect type is used', function (done) {
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try {
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new WebGLArrayBuffer(1234);
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} catch (e) {
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done();
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}
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done(true);
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});
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});
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describe('#getArrayClassForType', function () {
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it('returns the correct typed array constructor', function () {
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expect(getArrayClassForType(ARRAY_BUFFER)).to.be(Float32Array);
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expect(getArrayClassForType(ELEMENT_ARRAY_BUFFER)).to.be(Uint32Array);
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});
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});
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describe('populate methods', function () {
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let b;
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beforeEach(function () {
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b = new WebGLArrayBuffer(ARRAY_BUFFER);
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});
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it('initializes the array using a size', function () {
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b.ofSize(12);
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expect(b.getArray().length).to.be(12);
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expect(b.getArray()[0]).to.be(0);
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expect(b.getArray()[11]).to.be(0);
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});
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it('initializes the array using an array', function () {
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b.fromArray([1, 2, 3, 4, 5]);
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expect(b.getArray().length).to.be(5);
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expect(b.getArray()[0]).to.be(1);
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expect(b.getArray()[1]).to.be(2);
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expect(b.getArray()[2]).to.be(3);
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expect(b.getArray()[3]).to.be(4);
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expect(b.getArray()[4]).to.be(5);
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});
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it('initializes the array using a size', function () {
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const a = Float32Array.of(1, 2, 3, 4, 5);
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b.fromArrayBuffer(a.buffer);
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expect(b.getArray().length).to.be(5);
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expect(b.getArray()[0]).to.be(1);
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expect(b.getArray()[1]).to.be(2);
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expect(b.getArray()[2]).to.be(3);
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expect(b.getArray()[3]).to.be(4);
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expect(b.getArray()[4]).to.be(5);
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});
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});
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describe('#getSize', function () {
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let b;
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beforeEach(function () {
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b = new WebGLArrayBuffer(ARRAY_BUFFER);
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});
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it('returns 0 when the buffer array is not initialized', function () {
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expect(b.getSize()).to.be(0);
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});
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it('returns the size of the array otherwise', function () {
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b.ofSize(12);
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expect(b.getSize()).to.be(12);
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});
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});
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});
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