svg-pathdata/src/tests/matrix.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';

describe("Matrix transformation should be the same than it's equivalent transformation", () => {
  test('should fail with bad args', () => {
    expect(() =>
      new SVGPathData('m20,30l10,10z')
        .matrix(...([] as unknown as Parameters<SVGPathData['matrix']>))
        .encode(),
    ).toThrow(
      new Error(
        'assertNumbers arguments[0] is not a number. undefined == typeof undefined',
      ),
    );

    expect(() =>
      new SVGPathData('m20,30l10,10z')
        .matrix(...([1] as unknown as Parameters<SVGPathData['matrix']>))
        .encode(),
    ).toThrow(
      new Error(
        'assertNumbers arguments[1] is not a number. undefined == typeof undefined',
      ),
    );

    expect(() =>
      new SVGPathData('m20,30l10,10z')
        .matrix(...([1, 1] as unknown as Parameters<SVGPathData['matrix']>))
        .encode(),
    ).toThrow(
      new Error(
        'assertNumbers arguments[2] is not a number. undefined == typeof undefined',
      ),
    );

    expect(() =>
      new SVGPathData('m20,30l10,10z')
        .matrix(...([1, 1, 1] as unknown as Parameters<SVGPathData['matrix']>))
        .encode(),
    ).toThrow(
      new Error(
        'assertNumbers arguments[3] is not a number. undefined == typeof undefined',
      ),
    );

    expect(() =>
      new SVGPathData('m20,30l10,10z')
        .matrix(
          ...([1, 1, 1, 1] as unknown as Parameters<SVGPathData['matrix']>),
        )
        .encode(),
    ).toThrow(
      new Error(
        'assertNumbers arguments[4] is not a number. undefined == typeof undefined',
      ),
    );

    expect(() =>
      new SVGPathData('m20,30l10,10z')
        .matrix(
          ...([1, 1, 1, 1, 1] as unknown as Parameters<SVGPathData['matrix']>),
        )
        .encode(),
    ).toThrow(
      new Error(
        'assertNumbers arguments[5] is not a number. undefined == typeof undefined',
      ),
    );
  });

  test('for scale', () => {
    expect(
      new SVGPathData('m20 30c0 0 10 20 15 30z').scale(10, 10).encode(),
    ).toEqual(
      new SVGPathData('m20 30c0 0 10 20 15 30z')
        .matrix(10, 0, 0, 10, 0, 0)
        .encode(),
    );
  });
});