18b680ad53
Promise.allSettled only catches rejected promises, not synchronous throws. Wrap handler calls in Promise.resolve().then() to isolate sync errors. Add 6 unit tests covering delivery, unsubscribe, error isolation, singleton, reset, and removeAll.
52 lines
1.7 KiB
TypeScript
52 lines
1.7 KiB
TypeScript
import { describe, it, expect, vi, beforeEach } from 'vitest';
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import { getEventBus, _resetEventBus } from './event-bus.js';
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describe('DomainEventBus', () => {
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beforeEach(() => { _resetEventBus(); });
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it('delivers event to subscriber', async () => {
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const bus = getEventBus();
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const handler = vi.fn();
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bus.on('note.created', handler);
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await bus.emit('note.created', { noteId: 'n1', workspaceId: 'w1', userId: 'u1', title: 'Test' });
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expect(handler).toHaveBeenCalledOnce();
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});
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it('unsubscribe stops delivery', async () => {
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const bus = getEventBus();
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const handler = vi.fn();
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const unsub = bus.on('note.created', handler);
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unsub();
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await bus.emit('note.created', { noteId: 'n1', workspaceId: 'w1', userId: 'u1', title: 'Test' });
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expect(handler).not.toHaveBeenCalled();
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});
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it('failing handler does not block others', async () => {
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const bus = getEventBus();
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const good = vi.fn();
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bus.on('note.created', () => { throw new Error('boom'); });
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bus.on('note.created', good);
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await bus.emit('note.created', { noteId: 'n1', workspaceId: 'w1', userId: 'u1', title: 'Test' });
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expect(good).toHaveBeenCalledOnce();
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});
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it('singleton returns same instance', () => {
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expect(getEventBus()).toBe(getEventBus());
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});
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it('_resetEventBus creates fresh instance', () => {
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const a = getEventBus();
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_resetEventBus();
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expect(getEventBus()).not.toBe(a);
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});
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it('removeAll clears handlers', async () => {
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const bus = getEventBus();
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const handler = vi.fn();
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bus.on('note.created', handler);
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bus.removeAll();
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await bus.emit('note.created', { noteId: 'n1', workspaceId: 'w1', userId: 'u1', title: 'Test' });
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expect(handler).not.toHaveBeenCalled();
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});
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});
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