121 lines
4.1 KiB
JavaScript
121 lines
4.1 KiB
JavaScript
import _ol_transform_ from '../../../src/ol/transform.js';
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describe('ol.transform', function() {
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function assertRoughlyEqual(t1, t2) {
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t1.forEach(function(item, index) {
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expect(item).to.roughlyEqual(t2[index], 1e-8);
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});
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}
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describe('ol.transform.create()', function() {
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it('creates an identity transform', function() {
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expect(_ol_transform_.create()).to.eql([1, 0, 0, 1, 0, 0]);
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});
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});
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describe('ol.transform.reset()', function() {
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it('resets tansform to an identity transform', function() {
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var transform = [1, 2, 3, 4, 5, 6];
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expect(_ol_transform_.reset(transform)).to.eql([1, 0, 0, 1, 0, 0]);
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expect(transform).to.eql([1, 0, 0, 1, 0, 0]);
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});
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});
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describe('ol.transform.set()', function() {
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it('sets the given values', function() {
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var transform = _ol_transform_.create();
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expect(_ol_transform_.set(transform, 1, 2, 3, 4, 5, 6)).to.eql([1, 2, 3, 4, 5, 6]);
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expect(transform).to.eql([1, 2, 3, 4, 5, 6]);
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});
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});
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describe('ol.transform.setFromArray()', function() {
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it('sets values of 2nd transform on 1st transform', function() {
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var transform1 = _ol_transform_.create();
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var transform2 = [1, 2, 3, 4, 5, 6];
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expect(_ol_transform_.setFromArray(transform1, transform2)).to.eql(transform2);
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expect(transform1).to.eql(transform2);
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});
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});
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describe('ol.transform.translate()', function() {
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it('applies translation to a transform', function() {
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var transform = _ol_transform_.create();
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expect(_ol_transform_.translate(transform, 3, 4)).to.eql([1, 0, 0, 1, 3, 4]);
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expect(transform).to.eql([1, 0, 0, 1, 3, 4]);
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});
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});
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describe('ol.transform.scale()', function() {
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it('applies scaling to a transform', function() {
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var transform = _ol_transform_.create();
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expect(_ol_transform_.scale(transform, 3, 4)).to.eql([3, 0, 0, 4, 0, 0]);
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expect(transform).to.eql([3, 0, 0, 4, 0, 0]);
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});
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});
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describe('ol.transform.rotate()', function() {
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it('applies rotation to a transform', function() {
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var transform = _ol_transform_.create();
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assertRoughlyEqual(_ol_transform_.rotate(transform, Math.PI / 2), [0, 1, -1, 0, 0, 0]);
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assertRoughlyEqual(transform, [0, 1, -1, 0, 0, 0]);
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});
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});
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describe('ol.transform.multiply()', function() {
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it('multiplies two transforms', function() {
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var transform1 = [1, 2, 1, 2, 1, 2];
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var transform2 = [1, 2, 1, 2, 1, 2];
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expect(_ol_transform_.multiply(transform1, transform2)).to.eql([3, 6, 3, 6, 4, 8]);
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expect(transform1).to.eql([3, 6, 3, 6, 4, 8]);
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});
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});
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describe('ol.transform.compose()', function() {
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it('composes a translate, scale, rotate, translate transform', function() {
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var dx1 = 3;
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var dy1 = 4;
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var sx = 1.5;
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var sy = -1.5;
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var angle = Math.PI / 3;
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var dx2 = -dx1 / 2;
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var dy2 = -dy1 / 2;
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var expected = _ol_transform_.create();
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_ol_transform_.translate(expected, dx1, dy1);
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_ol_transform_.scale(expected, sx, sy);
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_ol_transform_.rotate(expected, angle);
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_ol_transform_.translate(expected, dx2, dy2);
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var composed = _ol_transform_.create();
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var composedReturn = _ol_transform_.compose(composed, dx1, dy1, sx, sy, angle, dx2, dy2);
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expect(composed).to.equal(composedReturn);
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expect(composed).to.eql(expected);
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});
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});
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describe('ol.transform.invert()', function() {
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it('inverts a transform', function() {
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var transform = [1, 0, 1, 0, 1, 0];
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expect(function() {
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_ol_transform_.invert(transform);
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}).to.throwException();
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transform = [1, 1, 1, 2, 2, 0];
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expect(_ol_transform_.invert(transform)).to.eql([2, -1, -1, 1, -4, 2]);
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expect(transform).to.eql([2, -1, -1, 1, -4, 2]);
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});
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});
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describe('ol.transform.apply()', function() {
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it('applies a transform to a 2d vector', function() {
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var transform = _ol_transform_.translate(_ol_transform_.create(), 2, 3);
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var point = [1, 2];
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expect(_ol_transform_.apply(transform, point)).to.eql([3, 5]);
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expect(point).to.eql([3, 5]);
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});
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});
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});
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