@uppy/utils/lib/AbortController.test.js

Shared utility functions for Uppy Core and plugins maintained by the Uppy team.

import { describe, expect, it, vi } from 'vitest';
import { AbortController, AbortSignal } from './AbortController.js';
function flushInstantTimeouts() {
    return new Promise((resolve) => setTimeout(resolve, 0));
}
describe('AbortController', () => {
    it('has the expected shape', () => {
        const controller = new AbortController();
        expect(typeof controller.abort).toBe('function');
        expect(controller.signal).toBeInstanceOf(AbortSignal);
    });
    it('emits "abort" when abort() is called', async () => {
        const controller = new AbortController();
        const callback = vi.fn();
        controller.signal.addEventListener('abort', callback);
        controller.abort();
        await flushInstantTimeouts();
        expect(callback).toHaveBeenCalled();
        expect(callback.mock.calls[0][0]).toBeInstanceOf(Event);
    });
    it('add and remove events', async () => {
        const controller = new AbortController();
        const callback = vi.fn();
        const callback2 = vi.fn();
        controller.signal.addEventListener('abort', callback);
        controller.signal.addEventListener('abort', callback2);
        controller.signal.removeEventListener('abort', callback);
        controller.abort();
        await flushInstantTimeouts();
        expect(callback2).toHaveBeenCalled();
        expect(callback2.mock.calls[0][0]).toBeInstanceOf(Event);
        expect(callback).not.toHaveBeenCalled();
    });
    it('sets `signal.aborted` property when abort() is called', () => {
        const controller = new AbortController();
        expect(controller.signal.aborted).toBe(false);
        controller.abort();
        expect(controller.signal.aborted).toBe(true);
    });
});