bpo-36801: Fix waiting in StreamWriter.drain for closing SSL transport (GH-13098)

https://bugs.python.org/issue36801

Lib/test/test_asyncio/test_streams.py

@@ -109,6 +109,29 @@ class StreamTests(test_utils.TestCase):
 
             self._basetest_open_connection_no_loop_ssl(conn_fut)
 
+    @unittest.skipIf(ssl is None, 'No ssl module')
+    def test_drain_on_closed_writer_ssl(self):
+
+        async def inner(httpd):
+            reader, writer = await asyncio.open_connection(
+                *httpd.address,
+                ssl=test_utils.dummy_ssl_context())
+
+            messages = []
+            self.loop.set_exception_handler(lambda loop, ctx: messages.append(ctx))
+            writer.write(b'GET / HTTP/1.0\r\n\r\n')
+            data = await reader.read()
+            self.assertTrue(data.endswith(b'\r\n\r\nTest message'))
+
+            writer.close()
+            with self.assertRaises(ConnectionResetError):
+                await writer.drain()
+
+            self.assertEqual(messages, [])
+
+        with test_utils.run_test_server(use_ssl=True) as httpd:
+            self.loop.run_until_complete(inner(httpd))
+
     def _basetest_open_connection_error(self, open_connection_fut):
         messages = []
         self.loop.set_exception_handler(lambda loop, ctx: messages.append(ctx))