test/ut/spec/util/graphic.test.ts

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* to you under the Apache License, Version 2.0 (the
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*
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import {
    subPixelOptimize, subPixelOptimizeLine, subPixelOptimizeRect
} from 'zrender/src/graphic/helper/subPixelOptimize';
import { lineLineIntersect } from '@/src/util/graphic';


describe('util/graphic', function () {

    describe('subPixelOptimize', function () {

        it('subPixelOptimize_base', function () {
            expect(subPixelOptimize(5, 1)).toEqual(4.5);
            expect(subPixelOptimize(5, 2)).toEqual(5);
            expect(subPixelOptimize(5, 43)).toEqual(4.5);
            expect(subPixelOptimize(7.5, 1)).toEqual(7.5);
            expect(subPixelOptimize(7.5, 2)).toEqual(7);
            expect(subPixelOptimize(14, 1, true)).toEqual(14.5);
            expect(subPixelOptimize(14, 2, true)).toEqual(14);
            expect(subPixelOptimize(-11, 1)).toEqual(-11.5);
            expect(subPixelOptimize(-11, 2)).toEqual(-11);
            expect(subPixelOptimize(0, 2)).toEqual(0);
            expect(subPixelOptimize(0, 1)).toEqual(-0.5);
            expect(subPixelOptimize(5, 0)).toEqual(5);
        });

        it('subPixelOptimize_line', function () {
            function doSubPixelOptimizeLine(x: number, y: number, width: number, height: number, lineWidth: number) {
                const params = makeParam(x, y, width, height, lineWidth);
                return subPixelOptimizeLine(params.shape, params.shape, params.style);
            }
            function makeParam(x1: number, y1: number, x2: number, y2: number, lineWidth: number) {
                return {
                    shape: {x1: x1, y1: y1, x2: x2, y2: y2},
                    style: {lineWidth: lineWidth}
                };
            }
            expect(doSubPixelOptimizeLine(5, 11, 3, 7, 1)).toEqual(makeParam(5, 11, 3, 7, 1).shape);
            expect(doSubPixelOptimizeLine(5, 11, 5, 7, 1)).toEqual(makeParam(5.5, 11, 5.5, 7, 1).shape);
            expect(doSubPixelOptimizeLine(5, 11, 5, 7, 2)).toEqual(makeParam(5, 11, 5, 7, 2).shape);
            expect(doSubPixelOptimizeLine(5, 11, 15, 11, 1)).toEqual(makeParam(5, 11.5, 15, 11.5, 1).shape);
            expect(doSubPixelOptimizeLine(5, 11, 15, 11, 2)).toEqual(makeParam(5, 11, 15, 11, 2).shape);
            expect(doSubPixelOptimizeLine(5, 11, 15, 11, 3)).toEqual(makeParam(5, 11.5, 15, 11.5, 3).shape);
            expect(doSubPixelOptimizeLine(5, 11, 15, 11.5, 3)).toEqual(makeParam(5, 11, 15, 11.5, 3).shape);
            expect(doSubPixelOptimizeLine(5, 11.5, 15, 11.5, 3)).toEqual(makeParam(5, 11.5, 15, 11.5, 3).shape);
            expect(doSubPixelOptimizeLine(5, 11.5, 15, 11.5, 4)).toEqual(makeParam(5, 12, 15, 12, 4).shape);
        });

        it('subPixelOptimize_rect', function () {
            function doSubPixelOptimizeRect(x: number, y: number, width: number, height: number, lineWidth: number) {
                const params = makeParam(x, y, width, height, lineWidth);
                return subPixelOptimizeRect(params.shape, params.shape, params.style);
            }
            function makeParam(x: number, y: number, width: number, height: number, lineWidth: number) {
                return {
                    shape: {x: x, y: y, width: width, height: height},
                    style: {lineWidth: lineWidth}
                };
            }
            expect(doSubPixelOptimizeRect(5, 11, 3, 7, 1)).toEqual(makeParam(5.5, 11.5, 2, 6, 1).shape);
            expect(doSubPixelOptimizeRect(5, 11, 3, 7, 2)).toEqual(makeParam(5, 11, 3, 7, 2).shape);
            expect(doSubPixelOptimizeRect(5, 11, 3, 7, 3)).toEqual(makeParam(5.5, 11.5, 2, 6, 3).shape);
            // Boundary value tests
            expect(doSubPixelOptimizeRect(5, 11, 1, 7, 1)).toEqual(makeParam(5.5, 11.5, 1, 6, 1).shape);
            expect(doSubPixelOptimizeRect(5, 11, 1, 0, 1)).toEqual(makeParam(5.5, 11.5, 1, 0, 1).shape);
        });

    });

    describe('lineLineIntersect', function () {

        it('extreme', function () {
            expect(lineLineIntersect(10, 10, 30, 30, 10, 10, 10, 10)).toEqual(false);
        });

        it('parallel and colinear', function () {
            expect(lineLineIntersect(10, 20, 30, 40, 100, 220, 120, 240)).toEqual(false);
            expect(lineLineIntersect(10, 10, 30, 30, 40, 40, 50, 50)).toEqual(false);
            expect(lineLineIntersect(10, 10, 30, 30, 10, 10, 30, 30)).toEqual(false);
            expect(lineLineIntersect(10, 10, 30, 30, 20, 20, 30, 30)).toEqual(false);
            expect(lineLineIntersect(10, 10, 30, 30, 20, 20, 22, 22)).toEqual(false);
        });

        it('intersect', function () {
            expect(lineLineIntersect(10, 20, 30, 40, 12, 20, 30, 40)).toEqual(true);
            expect(lineLineIntersect(10, 20, 30, 40, 12, 20, 20, 42)).toEqual(true);
        });
    });

});