97 lines
3.8 KiB
JavaScript
97 lines
3.8 KiB
JavaScript
describe('PathKit\'s SVG Behavior', function() {
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it('can create a path from an SVG string', function(done) {
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LoadPathKit.then(catchException(done, () => {
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//.This is a parallelagram from
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// https://upload.wikimedia.org/wikipedia/commons/e/e7/Simple_parallelogram.svg
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let path = PathKit.FromSVGString('M 205,5 L 795,5 L 595,295 L 5,295 L 205,5 z');
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let cmds = path.toCmds();
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expect(cmds).toBeTruthy();
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// 1 move, 4 lines, 1 close
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// each element in cmds is an array, with index 0 being the verb, and the rest being args
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expect(cmds.length).toBe(6);
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expect(cmds).toEqual([[PathKit.MOVE_VERB, 205, 5],
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[PathKit.LINE_VERB, 795, 5],
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[PathKit.LINE_VERB, 595, 295],
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[PathKit.LINE_VERB, 5, 295],
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[PathKit.LINE_VERB, 205, 5],
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[PathKit.CLOSE_VERB]]);
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path.delete();
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done();
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}));
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});
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it('can create an SVG string from a path', function(done) {
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LoadPathKit.then(catchException(done, () => {
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let cmds = [[PathKit.MOVE_VERB, 205, 5],
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[PathKit.LINE_VERB, 795, 5],
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[PathKit.LINE_VERB, 595, 295],
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[PathKit.LINE_VERB, 5, 295],
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[PathKit.LINE_VERB, 205, 5],
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[PathKit.CLOSE_VERB]];
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let path = PathKit.FromCmds(cmds);
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let svgStr = path.toSVGString();
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// We output it in terse form, which is different than Wikipedia's version
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expect(svgStr).toEqual('M205 5L795 5L595 295L5 295L205 5Z');
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path.delete();
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done();
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}));
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});
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it('can create an SVG string from hex values', function(done) {
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LoadPathKit.then(catchException(done, () => {
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let cmds = [[PathKit.MOVE_VERB, "0x15e80300", "0x400004dc"], // 9.37088e-26f, 2.0003f
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[PathKit.LINE_VERB, 795, 5],
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[PathKit.LINE_VERB, 595, 295],
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[PathKit.LINE_VERB, 5, 295],
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[PathKit.LINE_VERB, "0x15e80300", "0x400004dc"], // 9.37088e-26f, 2.0003f
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[PathKit.CLOSE_VERB]];
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let path = PathKit.FromCmds(cmds);
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let svgStr = path.toSVGString();
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expect(svgStr).toEqual('M9.37088e-26 2.0003L795 5L595 295L5 295L9.37088e-26 2.0003Z');
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path.delete();
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done();
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}));
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});
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it('should have input and the output be the same', function(done) {
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LoadPathKit.then(catchException(done, () => {
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let testCases = [
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'M0 0L1075 0L1075 242L0 242L0 0Z'
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];
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for(let svg of testCases) {
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let path = PathKit.FromSVGString(svg);
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let output = path.toSVGString();
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expect(svg).toEqual(output);
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path.delete();
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}
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done();
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}));
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});
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it('approximates arcs (conics) with quads', function(done) {
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LoadPathKit.then(catchException(done, () => {
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let path = PathKit.NewPath();
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path.moveTo(50, 120);
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path.arc(50, 120, 45, 0, 1.75 * Math.PI);
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path.lineTo(50, 120);
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let svgStr = path.toSVGString();
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// Q stands for quad. No need to check the whole path, as that's more
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// what the gold correctness tests are for (can account for changes we make
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// to the approximation algorithms).
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expect(svgStr).toContain('Q');
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path.delete();
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reportSVGString(svgStr, 'conics_quads_approx').then(() => {
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done();
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}).catch(reportError(done));
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}));
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});
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});
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