svgedit/test/math_test.js

122 lines
3.9 KiB
JavaScript

/* eslint-env qunit */
import {NS} from '../editor/namespaces.js';
import * as math from '../editor/math.js';
// log function
QUnit.log((details) => {
if (window.console && window.console.log) {
window.console.log(details.result + ' :: ' + details.message);
}
});
const svg = document.createElementNS(NS.SVG, 'svg');
QUnit.module('svgedit.math');
QUnit.test('Test svgedit.math package', function (assert) {
assert.expect(7);
assert.ok(math);
assert.ok(math.transformPoint);
assert.ok(math.isIdentity);
assert.ok(math.matrixMultiply);
assert.equal(typeof math.transformPoint, typeof function () { /* */ });
assert.equal(typeof math.isIdentity, typeof function () { /* */ });
assert.equal(typeof math.matrixMultiply, typeof function () { /* */ });
});
QUnit.test('Test svgedit.math.transformPoint() function', function (assert) {
assert.expect(6);
const {transformPoint} = math;
const m = svg.createSVGMatrix();
m.a = 1; m.b = 0;
m.c = 0; m.d = 1;
m.e = 0; m.f = 0;
let pt = transformPoint(100, 200, m);
assert.equal(pt.x, 100);
assert.equal(pt.y, 200);
m.e = 300; m.f = 400;
pt = transformPoint(100, 200, m);
assert.equal(pt.x, 400);
assert.equal(pt.y, 600);
m.a = 0.5; m.b = 0.75;
m.c = 1.25; m.d = 2;
pt = transformPoint(100, 200, m);
assert.equal(pt.x, 100 * m.a + 200 * m.c + m.e);
assert.equal(pt.y, 100 * m.b + 200 * m.d + m.f);
});
QUnit.test('Test svgedit.math.isIdentity() function', function (assert) {
assert.expect(2);
assert.ok(math.isIdentity(svg.createSVGMatrix()));
const m = svg.createSVGMatrix();
m.a = 1; m.b = 0;
m.c = 0; m.d = 1;
m.e = 0; m.f = 0;
assert.ok(math.isIdentity(m));
});
QUnit.test('Test svgedit.math.matrixMultiply() function', function (assert) {
assert.expect(5);
const mult = math.matrixMultiply;
const {isIdentity} = math;
// translate there and back
const tr1 = svg.createSVGMatrix().translate(100, 50),
tr2 = svg.createSVGMatrix().translate(-90, 0),
tr3 = svg.createSVGMatrix().translate(-10, -50);
let I = mult(tr1, tr2, tr3);
assert.ok(isIdentity(I), 'Expected identity matrix when translating there and back');
// rotate there and back
// TODO: currently Mozilla fails this when rotating back at -50 and then -40 degrees
// (b and c are *almost* zero, but not zero)
const rotThere = svg.createSVGMatrix().rotate(90),
rotBack = svg.createSVGMatrix().rotate(-90), // TODO: set this to -50
rotBackMore = svg.createSVGMatrix().rotate(0); // TODO: set this to -40
I = mult(rotThere, rotBack, rotBackMore);
assert.ok(isIdentity(I), 'Expected identity matrix when rotating there and back');
// scale up and down
const scaleUp = svg.createSVGMatrix().scale(4),
scaleDown = svg.createSVGMatrix().scaleNonUniform(0.25, 1),
scaleDownMore = svg.createSVGMatrix().scaleNonUniform(1, 0.25);
I = mult(scaleUp, scaleDown, scaleDownMore);
assert.ok(isIdentity(I), 'Expected identity matrix when scaling up and down');
// test multiplication with its inverse
I = mult(rotThere, rotThere.inverse());
assert.ok(isIdentity(I), 'Expected identity matrix when multiplying a matrix by its inverse');
I = mult(rotThere.inverse(), rotThere);
assert.ok(isIdentity(I), 'Expected identity matrix when multiplying a matrix by its inverse');
});
QUnit.test('Test svgedit.math.transformBox() function', function (assert) {
assert.expect(12);
const {transformBox} = math;
const m = svg.createSVGMatrix();
m.a = 1; m.b = 0;
m.c = 0; m.d = 1;
m.e = 0; m.f = 0;
const r = transformBox(10, 10, 200, 300, m);
assert.equal(r.tl.x, 10);
assert.equal(r.tl.y, 10);
assert.equal(r.tr.x, 210);
assert.equal(r.tr.y, 10);
assert.equal(r.bl.x, 10);
assert.equal(r.bl.y, 310);
assert.equal(r.br.x, 210);
assert.equal(r.br.y, 310);
assert.equal(r.aabox.x, 10);
assert.equal(r.aabox.y, 10);
assert.equal(r.aabox.width, 200);
assert.equal(r.aabox.height, 300);
});