refactor: 复用持久设备工作线程 (#110)

client/test/test_pdd_ui_event.py

@@ -1153,6 +1153,36 @@ class PDDTaskPageEventTest(unittest.TestCase):
         events.shutdown()
         page.deleteLater()
 
+    def test_auto_fetch_reuses_one_fixed_worker_thread_across_cycles(self):
+        gateway = RecordingClaimGateway()
+        page = PDDTaskPage()
+        events = PDDTaskPageEvent(
+            page,
+            self.repository,
+            claim_gateway=gateway,
+            settings_repository=self._saved_settings(),
+            collect_service_factory=fake_collect_factory,
+            no_task_delay_ms=10,
+        )
+
+        page.autoFetchRequested.emit()
+        self.assertTrue(
+            wait_until(self.app, lambda: len(gateway.thread_ids) >= 2),
+            "自动获取没有完成两轮串行调度",
+        )
+        executor_thread = events._claim_thread
+        page.autoFetchRequested.emit()
+        self.assertTrue(wait_until(self.app, lambda: not events._claim_busy))
+
+        self.assertIs(events._claim_thread, executor_thread)
+        self.assertTrue(
+            executor_thread is not None and executor_thread.isRunning()
+        )
+        self.assertEqual(len(set(gateway.thread_ids)), 1)
+        events.shutdown()
+        self.assertFalse(executor_thread.isRunning())
+        page.deleteLater()
+
     def test_new_claim_refreshes_table_before_collection_finishes(self):
         gateway = RecordingClaimGateway(collect_admin_task("COL-EARLY"))
         collect_started = threading.Event()