k88936
27f7375b51
- unhandledRejectionBridge：合成事件优先用 PromiseRejectionEvent（jsdom 没这个构造器时退回普通 Event），再把 reason / promise 都挂成实例访问器，jsdom 分支下 promise 也可读 - 判定调整为读 reason 或 promise 任一个都算 window 侧接手（原来只认 reason） - 补一条用例：事件带 promise 且读 promise 也算被消费
106 lines
3.6 KiB
TypeScript
106 lines
3.6 KiB
TypeScript
// @vitest-environment jsdom
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/**
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* jsdom `unhandledrejection` 桥的「只吞被消费的拒绝」语义。
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*
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* 桥接管 Node 监听器是为了让组件能收到 window 事件；但没人消费的拒绝必须交回原监听器，
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* 否则用例会静默吞掉真实的未处理拒绝。
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*/
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import { afterEach, expect, test } from 'vitest';
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import { installUnhandledRejectionBridge } from './unhandledRejectionBridge';
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const installed: Array<() => void> = [];
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const processListeners: Array<(reason: unknown, promise: unknown) => void> = [];
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const windowListeners: Array<(event: Event) => void> = [];
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let parkedListeners: Array<(reason: unknown, promise: unknown) => void> = [];
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afterEach(() => {
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while (installed.length > 0) installed.pop()?.();
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while (processListeners.length > 0) {
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process.removeListener('unhandledRejection', processListeners.pop()!);
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}
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while (windowListeners.length > 0) {
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window.removeEventListener('unhandledrejection', windowListeners.pop()!);
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}
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for (const listener of parkedListeners) {
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process.on('unhandledRejection', listener);
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}
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parkedListeners = [];
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});
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/** 停放 vitest 自己的监听器，好观察「交回原监听器」而不触发用例失败上报。 */
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function parkProcessListeners() {
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parkedListeners = process.listeners('unhandledRejection');
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process.removeAllListeners('unhandledRejection');
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}
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function trackProcessListener() {
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const forwarded: unknown[] = [];
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const listener = (reason: unknown) => {
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forwarded.push(reason);
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};
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processListeners.push(listener);
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process.on('unhandledRejection', listener);
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return forwarded;
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}
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test('没人读 reason 的拒绝会交回原监听器', () => {
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parkProcessListeners();
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const forwarded = trackProcessListener();
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installed.push(installUnhandledRejectionBridge());
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const reason = new Error('意外的拒绝');
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process.emit('unhandledRejection', reason, Promise.resolve());
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expect(forwarded).toEqual([reason]);
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});
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test('window 侧读过 reason 的拒绝不再交回原监听器', () => {
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const forwarded = trackProcessListener();
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const consumed: unknown[] = [];
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const listener = (event: Event) => {
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consumed.push((event as Event & { reason?: unknown }).reason);
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};
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windowListeners.push(listener);
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window.addEventListener('unhandledrejection', listener);
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installed.push(installUnhandledRejectionBridge());
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const reason = new Error('已接手的拒绝');
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process.emit('unhandledRejection', reason, Promise.resolve());
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expect(consumed).toEqual([reason]);
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expect(forwarded).toEqual([]);
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});
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test('交回原监听器时 this 绑成 process，和 Node EventEmitter 一致', () => {
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parkProcessListeners();
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const receivers: unknown[] = [];
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const listener = function (this: unknown) {
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receivers.push(this);
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};
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processListeners.push(listener);
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process.on('unhandledRejection', listener);
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installed.push(installUnhandledRejectionBridge());
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process.emit('unhandledRejection', new Error('需要交回'), Promise.resolve());
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expect(receivers).toEqual([process]);
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});
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test('合成事件同时带 reason 与 promise，读任一个都算被消费', () => {
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const forwarded = trackProcessListener();
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let received: unknown = null;
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const listener = (event: Event) => {
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received = (event as Event & { promise?: unknown }).promise;
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};
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windowListeners.push(listener);
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window.addEventListener('unhandledrejection', listener);
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installed.push(installUnhandledRejectionBridge());
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const promise = Promise.resolve();
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process.emit('unhandledRejection', new Error('带 promise 的拒绝'), promise);
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expect(received).toBe(promise);
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expect(forwarded).toEqual([]);
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});
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