add tests

Author: kumaraditya303

Lib/test/test_asyncio/test_futures.py

@@ -750,6 +750,10 @@ def test_future_cancelled_exception_refcycles(self):
         self.assertIsNotNone(exc)
         self.assertListEqual(gc.get_referrers(exc), [])
 
+    def test_future_disallow_multiple_initialization(self):
+        f = self._new_future(loop=self.loop)
+        with self.assertRaises(RuntimeError, msg="is already initialized"):
+            f.__init__(loop=self.loop)
 
 @unittest.skipUnless(hasattr(futures, '_CFuture'),
                      'requires the C _asyncio module')

Lib/test/test_asyncio/test_tasks.py

@@ -2776,6 +2776,18 @@ def test_get_context(self):
         finally:
             loop.close()
 
+    def test_task_disallow_multiple_initialization(self):
+        async def foo():
+            pass
+
+        coro = foo()
+        self.addCleanup(coro.close)
+        task = self.new_task(self.loop, coro)
+        task._log_destroy_pending = False
+
+        with self.assertRaises(RuntimeError, msg="is already initialized"):
+            task.__init__(coro, loop=self.loop)
+
 def add_subclass_tests(cls):
     BaseTask = cls.Task
     BaseFuture = cls.Future