async scheduler 1

solutions/test-async-scheduler-pause.js

@@ -0,0 +1,32 @@
+const TaskScheduler = require('./async-scheduler');
+
+function wait(ms, label) {
+  return () => new Promise((resolve) => {
+    console.log(`${label} started`);
+    setTimeout(() => {
+      console.log(`${label} finished`);
+      resolve(label);
+    }, ms);
+  });
+}
+
+(async () => {
+  const scheduler = new TaskScheduler(1);
+
+  scheduler.play();
+  const p1 = scheduler.addTask(wait(200, 'A'));
+  const p2 = scheduler.addTask(wait(50, 'B'));
+
+  // Pause immediately; B should not start until play()
+  scheduler.pause();
+
+  await p1;
+  console.log('p1 done');
+
+  // Wait 100ms to see if B started (it shouldn't)
+  await new Promise(r => setTimeout(r, 100));
+  console.log('After wait, now play again');
+  scheduler.play();
+  await p2;
+  console.log('p2 done');
+})();