jest.setup.ts

import { TextEncoder, TextDecoder } from 'util';

// Polyfill TextEncoder and TextDecoder for jsom.
Object.assign(global, { TextDecoder, TextEncoder });

// Mock svg functions that jsdom does not implement.
Object.defineProperty(global.SVGSVGElement.prototype, 'createSVGMatrix', {
    writable: true,
    value: jest.fn().mockImplementation(() => ({
        martix: jest.fn(() => [[]]),
        a: 0,
        b: 0,
        c: 0,
        d: 0,
        e: 0,
        f: 0,
        flipX: jest.fn().mockImplementation(() => global.SVGSVGElement),
        flipY: jest.fn().mockImplementation(() => global.SVGSVGElement),
        inverse: jest.fn().mockImplementation(() => global.SVGSVGElement),
        multiply: jest.fn().mockImplementation(() => global.SVGSVGElement),
        rotate: jest.fn().mockImplementation(() => ({
            translate: jest.fn().mockImplementation(() => ({
                rotate: jest.fn(),
            })),
        })),
        rotateFromVector: jest.fn().mockImplementation(
            () => global.SVGSVGElement
        ),
        scale: jest.fn().mockImplementation(() => global.SVGSVGElement),
        scaleNonUniform: jest.fn().mockImplementation(
            () => global.SVGSVGElement
        ),
        skewX: jest.fn().mockImplementation(() => global.SVGSVGElement),
        skewY: jest.fn().mockImplementation(() => global.SVGSVGElement),
        translate: jest.fn().mockImplementation(() => ({
            multiply: jest.fn().mockImplementation(() => ({
                multiply: jest.fn().mockImplementation(
                    () => global.SVGSVGElement
                ),
            })),
        })),
    })),
});

Object.defineProperty(global.SVGSVGElement.prototype, 'createSVGPoint', {
    writable: true,
    value: jest.fn().mockImplementation(() => ({
        x: 0,
        y: 0,
        matrixTransform: jest.fn().mockImplementation(() => ({
            x: 0,
            y: 0,
        })),
    })),
});

Object.defineProperty(global.SVGSVGElement.prototype, 'createSVGTransform', {
    writable: true,
    value: jest.fn().mockImplementation(() => ({
        angle: 0,
        matrix: {
            a: 1,
            b: 0,
            c: 0,
            d: 1,
            e: 0,
            f: 0,
            multiply: jest.fn(),
        },
        setMatrix: jest.fn(),
        setTranslate: jest.fn(),
    })),
});

// Mock the ResizeObserver API, which is not implemented in jsdom.
global.ResizeObserver = jest.fn().mockImplementation(() => ({
    observe: jest.fn(),
    unobserve: jest.fn(),
    disconnect: jest.fn(),
}));