import { EventHandlers } from '@/models/eventHandlers';

describe('eventHandlers tests', () => {
  it('should add the same key and handler only once', async () => {
    const handlers = new EventHandlers();
    const fn = vi.fn();
    handlers.add('fn', fn);
    handlers.add('fn', fn);
    await handlers.call('fn');
    expect(fn).toHaveBeenCalledOnce();
  });

  it('should add different handlers', async () => {
    const handlers = new EventHandlers();
    const a = vi.fn();
    const b = vi.fn();
    handlers.add('fn', a);
    handlers.add('fn', b);
    await handlers.call('fn');
    expect(a).toHaveBeenCalledOnce();
    expect(b).toHaveBeenCalledOnce();
  });

  it('should add/remove the same key and handler', () => {
    const handlers = new EventHandlers();
    const fn = vi.fn();
    handlers.add('fn', fn);
    expect(handlers.remove('fn', fn)).toBeTruthy();
  });

  it('should not remove handler of different key', () => {
    const handlers = new EventHandlers();
    const fn = vi.fn();
    handlers.add('foo', fn);
    expect(handlers.remove('bar', vi.fn() as any)).toBeFalsy();
  });
});