Add type annotations to TLSUpgradeProto

Author: DanielNoord

asyncpg/connect_utils.py

@@ -764,14 +764,21 @@ def _parse_connect_arguments(*, dsn, host, port, user, password, passfile,
 
 
 class TLSUpgradeProto(asyncio.Protocol):
-    def __init__(self, loop, host, port, ssl_context, ssl_is_advisory):
+    def __init__(
+        self,
+        loop: asyncio.AbstractEventLoop,
+        host: str,
+        port: int,
+        ssl_context: ssl_module.SSLContext,
+        ssl_is_advisory: bool,
+    ) -> None:
         self.on_data = _create_future(loop)
         self.host = host
         self.port = port
         self.ssl_context = ssl_context
         self.ssl_is_advisory = ssl_is_advisory
 
-    def data_received(self, data):
+    def data_received(self, data: bytes) -> None:
         if data == b'S':
             self.on_data.set_result(True)
         elif (self.ssl_is_advisory and
@@ -789,7 +796,7 @@ def data_received(self, data):
                     'rejected SSL upgrade'.format(
                         host=self.host, port=self.port)))
 
-    def connection_lost(self, exc):
+    def connection_lost(self, exc: typing.Optional[Exception]) -> None:
         if not self.on_data.done():
             if exc is None:
                 exc = ConnectionError('unexpected connection_lost() call')