iter(g217): 补 frame 内核冒烟并修复 effect 注销

2026-10-26 19:58:40 +08:00
parent d7ad79963b
commit 34985fff43
4 changed files with 119 additions and 5 deletions
@@ -0,0 +1,99 @@
+/*** 作用：@ui-arch/frame 内核冒烟——信号 / 副作用 / 计算值的语义断言（纯 JS，无需 DOM；跑 npm run smoke 执行） ***/
+import { computed, effect, signal } from '../dist/signal.js';
+
+let pass = 0;
+let fail = 0;
+
+/*** 断言：失败也继续跑完，最后统一给退出码（否则第一个红就看不到后面） ***/
+const ok = (label, cond) => {
+  if (cond) {
+    pass += 1;
+    console.log(`ok - ${label}`);
+    return;
+  }
+  fail += 1;
+  console.error(`NOT OK - ${label}`);
+};
+
+// —— 1. 信号的读写与同值短路 ——
+const count = signal(0);
+let hits = 0;
+effect(() => {
+  count();
+  hits += 1;
+});
+ok('effect 创建时立即执行一次', hits === 1);
+count(1);
+ok('写值后重跑', hits === 2);
+count(1);
+ok('写入相同值不触发（Object.is 短路）', hits === 2);
+
+// —— 2. 注销后不再重跑 ——
+const live = signal('a');
+let liveHits = 0;
+const dispose = effect(() => {
+  live();
+  liveHits += 1;
+});
+live('b');
+ok('注销前正常重跑', liveHits === 2);
+dispose();
+live('c');
+ok('注销后写值不再重跑（dispose 必须真的摘订阅）', liveHits === 2);
+
+// —— 3. 条件分支重追踪：上一轮读过、这一轮不读的信号不该再唤它 ——
+const flag = signal(true);
+const left = signal(0);
+const right = signal(0);
+let branchHits = 0;
+effect(() => {
+  branchHits += 1;
+  if (flag()) left();
+  else right();
+});
+const afterInit = branchHits;
+flag(false);
+ok('切分支本身触发一次重跑', branchHits === afterInit + 1);
+const afterSwitch = branchHits;
+left(9);
+ok('切走后旧的依赖不再唤它（重追踪要清旧订阅）', branchHits === afterSwitch);
+right(9);
+ok('切走后新依赖仍唤它', branchHits === afterSwitch + 1);
+
+// —— 4. computed：派生、链式、同值短路 ——
+const price = signal(10);
+const qty = signal(2);
+const total = computed(() => price() * qty());
+ok('computed 首次读即得派生值', total() === 20);
+price(3);
+ok('源变化后 computed 立即跟着变', total() === 6);
+let derivedHits = 0;
+effect(() => {
+  total();
+  derivedHits += 1;
+});
+const derivedBase = derivedHits;
+qty(3);
+ok('computed 变更会唤上层 effect（链式依赖成立）', derivedHits === derivedBase + 1);
+ok('链式计算值正确', total() === 9);
+
+// —— 5. 多订阅者：扇出与互不影响 ——
+const fan = signal(0);
+let a = 0;
+let b = 0;
+const disposeA = effect(() => {
+  fan();
+  a += 1;
+});
+effect(() => {
+  fan();
+  b += 1;
+});
+fan(1);
+ok('一次写值唤全部订阅者', a === 2 && b === 2);
+disposeA();
+fan(2);
+ok('注销一个订阅者不影响另一个', a === 2 && b === 3);
+
+console.log(`\n${fail === 0 ? 'SMOKE OK' : 'SMOKE FAILED'}（${pass} 通过 / ${fail} 失败）`);
+process.exit(fail === 0 ? 0 : 1);