voluptasquisquam/src/image/transform/__tests__/rotateFree.js

Image processing and manipulation in JavaScript

import {Image} from 'test/common';
import 'should';

describe('check the rotate transform with free rotation', function () {
    it('GREY image', function () {
        let image = new Image(5, 5,
            [
                0, 0, 0, 0, 0,
                0, 1, 1, 1, 1,
                0, 1, 2, 2, 2,
                0, 1, 2, 4, 3,
                0, 1, 2, 3, 3
            ],
            {kind: 'GREY'}
        );

        let result = image.rotate(45);

        Array.from(result.data).should.eql([
            255, 255, 255, 0, 255, 255, 255,
            255, 255,  0,  1,  0,  255, 255,
            255,  0,   1,  1,  1,   0,  255,
            0,   1,   1,  2,  1,   1,   0,
            255,   1,   2,  4,  2,   1,   255,
            255,  255,   3,  4,  3,   255,  255,
            255, 255,  255,  3,  255,  255, 255
        ]);
    });
});