完成50%

tests/discard-confirmation-runtime-smoke.js

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+const fs = require("node:fs");
+const path = require("node:path");
+const assert = require("node:assert/strict");
+
+const root = path.resolve(__dirname, "..");
+const modulePath = path.join(root, "utils", "discard-confirmation.js");
+
+const loadModule = async () => {
+  const source = fs.readFileSync(modulePath, "utf8");
+  return import(`data:text/javascript;base64,${Buffer.from(source).toString("base64")}`);
+};
+
+const run = async () => {
+  const { createDiscardConfirmation } = await loadModule();
+  const visibility = [];
+  const controller = createDiscardConfirmation((visible) => {
+    visibility.push(visible);
+  });
+
+  const first = controller.request();
+  const repeated = controller.request();
+  assert.strictEqual(repeated, first, "重复请求必须复用同一个等待 Promise");
+  assert.deepEqual(visibility, [true], "重复请求不得重复打开确认框");
+  controller.cancel();
+  assert.equal(await first, false, "取消必须让等待者得到 false");
+  assert.deepEqual(visibility, [true, false], "取消必须关闭确认框");
+
+  const confirmed = controller.request();
+  controller.confirm();
+  assert.equal(await confirmed, true, "确认必须让等待者得到 true");
+
+  const disposed = controller.request();
+  controller.dispose();
+  assert.equal(await disposed, false, "页面卸载必须释放等待者并返回 false");
+
+  const afterDispose = controller.request();
+  assert.notStrictEqual(afterDispose, disposed, "释放后必须能建立新的确认周期");
+  controller.cancel();
+  assert.equal(await afterDispose, false);
+
+  assert.throws(
+    () => createDiscardConfirmation(null),
+    /setVisible 必须是函数/,
+    "必须拒绝无法同步可见状态的消费者",
+  );
+  console.log("DISCARD-CONFIRMATION-RUNTIME-SMOKE PASS");
+};
+
+run().catch((error) => {
+  console.error(error);
+  process.exitCode = 1;
+});