svg-pathdata/src/tests/smoothcurveto.test.ts

Manipulate SVG path data (path[d] attribute content) simply and efficiently.

import { describe, test, expect } from '@jest/globals';
import { SVGPathData } from '../index.js';
import type { CommandS } from '../types.js';

describe('Parsing smooth curve to commands', () => {
  test('should not work when badly declared', () => {
    expect(() => new SVGPathData('S')).toThrow(
      new SyntaxError('Unterminated command at the path end.'),
    );

    expect(() => new SVGPathData('S10')).toThrow(
      new SyntaxError('Unterminated command at the path end.'),
    );

    expect(() => new SVGPathData('S10 10')).toThrow(
      new SyntaxError('Unterminated command at the path end.'),
    );

    expect(() => new SVGPathData('S10 10 10')).toThrow(
      new SyntaxError('Unterminated command at the path end.'),
    );

    expect(() => new SVGPathData('S10 10 10 10 10 10')).toThrow(
      new SyntaxError('Unterminated command at the path end.'),
    );

    expect(() => new SVGPathData('S10 10 10S10 10 10 10')).toThrow(
      new SyntaxError('Unterminated command at index 9.'),
    );
  });

  test('should work with comma separated coordinates', () => {
    const commands = new SVGPathData('S123,456 789,987').commands as CommandS[];

    expect(commands[0].type).toEqual(SVGPathData.SMOOTH_CURVE_TO);
    expect(commands[0].relative).toEqual(false);
    expect(commands[0].x2).toEqual(123);
    expect(commands[0].y2).toEqual(456);
    expect(commands[0].x).toEqual(789);
    expect(commands[0].y).toEqual(987);
  });

  test('should work with space separated coordinates', () => {
    const commands = new SVGPathData('S123 456 789 987').commands as CommandS[];

    expect(commands[0].type).toEqual(SVGPathData.SMOOTH_CURVE_TO);
    expect(commands[0].relative).toEqual(false);
    expect(commands[0].x2).toEqual(123);
    expect(commands[0].y2).toEqual(456);
    expect(commands[0].x).toEqual(789);
    expect(commands[0].y).toEqual(987);
  });

  test('should work with nested separated complexer coordinate pairs', () => {
    const commands = new SVGPathData(
      'S-10.0032e-5,-20.0032e-5 -30.0032e-5,-40.0032e-5',
    ).commands as CommandS[];

    expect(commands[0].type).toEqual(SVGPathData.SMOOTH_CURVE_TO);
    expect(commands[0].relative).toEqual(false);
    expect(commands[0].x2).toEqual(-10.0032e-5);
    expect(commands[0].y2).toEqual(-20.0032e-5);
    expect(commands[0].x).toEqual(-30.0032e-5);
    expect(commands[0].y).toEqual(-40.0032e-5);
  });

  test('should work with multiple pairs of coordinates', () => {
    const commands = new SVGPathData(
      'S-10.0032e-5,-20.0032e-5 -30.0032e-5,-40.0032e-5 -10.0032e-5,-20.0032e-5 -30.0032e-5,-40.0032e-5 -10.0032e-5,-20.0032e-5 -30.0032e-5,-40.0032e-5',
    ).commands as CommandS[];

    expect(commands[0].type).toEqual(SVGPathData.SMOOTH_CURVE_TO);
    expect(commands[0].relative).toEqual(false);
    expect(commands[0].x2).toEqual(-10.0032e-5);
    expect(commands[0].y2).toEqual(-20.0032e-5);
    expect(commands[0].x).toEqual(-30.0032e-5);
    expect(commands[0].y).toEqual(-40.0032e-5);
    expect(commands[1].type).toEqual(SVGPathData.SMOOTH_CURVE_TO);
    expect(commands[1].relative).toEqual(false);
    expect(commands[1].x2).toEqual(-10.0032e-5);
    expect(commands[1].y2).toEqual(-20.0032e-5);
    expect(commands[1].x).toEqual(-30.0032e-5);
    expect(commands[1].y).toEqual(-40.0032e-5);
    expect(commands[2].type).toEqual(SVGPathData.SMOOTH_CURVE_TO);
    expect(commands[2].relative).toEqual(false);
    expect(commands[2].x2).toEqual(-10.0032e-5);
    expect(commands[2].y2).toEqual(-20.0032e-5);
    expect(commands[2].x).toEqual(-30.0032e-5);
    expect(commands[2].y).toEqual(-40.0032e-5);
  });

  test('should work with multiple declared pairs of coordinates', () => {
    const commands = new SVGPathData(
      'S-10.0032e-5,-20.0032e-5 -30.0032e-5,-40.0032e-5 s-10.0032e-5,-20.0032e-5 -30.0032e-5,-40.0032e-5 S-10.0032e-5,-20.0032e-5 -30.0032e-5,-40.0032e-5',
    ).commands as CommandS[];

    expect(commands[0].type).toEqual(SVGPathData.SMOOTH_CURVE_TO);
    expect(commands[0].relative).toEqual(false);
    expect(commands[0].x2).toEqual(-10.0032e-5);
    expect(commands[0].y2).toEqual(-20.0032e-5);
    expect(commands[0].x).toEqual(-30.0032e-5);
    expect(commands[0].y).toEqual(-40.0032e-5);
    expect(commands[1].type).toEqual(SVGPathData.SMOOTH_CURVE_TO);
    expect(commands[1].relative).toEqual(true);
    expect(commands[1].x2).toEqual(-10.0032e-5);
    expect(commands[1].y2).toEqual(-20.0032e-5);
    expect(commands[1].x).toEqual(-30.0032e-5);
    expect(commands[1].y).toEqual(-40.0032e-5);
    expect(commands[2].type).toEqual(SVGPathData.SMOOTH_CURVE_TO);
    expect(commands[2].relative).toEqual(false);
    expect(commands[2].x2).toEqual(-10.0032e-5);
    expect(commands[2].y2).toEqual(-20.0032e-5);
    expect(commands[2].x).toEqual(-30.0032e-5);
    expect(commands[2].y).toEqual(-40.0032e-5);
  });
});