Addressed typing warnings from pyright

src/microdot/test_client.py

@@ -19,7 +19,7 @@ class TestResponse:
         #: explicitly sets it on the response object.
         self.reason = None
         #: A dictionary with the response headers.
-        self.headers = None
+        self.headers = {}
         #: The body of the response, as a bytes object.
         self.body = None
         #: The body of the response, decoded to a UTF-8 string. Set to
@@ -195,7 +195,7 @@ class TestClient:
                                    ('127.0.0.1', 1234))
         res = await self.app.dispatch_request(req)
         if res == Response.already_handled:
-            return None
+            return TestResponse()
         res.complete()
 
         self._update_cookies(res)

tests/test_microdot.py

@@ -771,7 +771,7 @@ class TestMicrodot(unittest.TestCase):
 
         client = TestClient(app)
         res = self._run(client.get('/'))
-        self.assertEqual(res, None)
+        self.assertEqual(res.body, None)
 
     def test_mount(self):
         subapp = Microdot()

tests/test_websocket.py

@@ -46,11 +46,11 @@ class TestWebSocket(unittest.TestCase):
 
         client = TestClient(app)
         res = self._run(client.websocket('/echo', ws))
-        self.assertIsNone(res)
+        self.assertIsNone(res.body)
         self.assertEqual(results, ['hello', b'bye', b'*' * 300, b'+' * 65537])
 
         res = self._run(client.websocket('/divzero', ws))
-        self.assertIsNone(res)
+        self.assertIsNone(res.body)
         WebSocket.max_message_length = -1
 
     @unittest.skipIf(sys.implementation.name == 'micropython',
@@ -74,7 +74,7 @@ class TestWebSocket(unittest.TestCase):
 
         client = TestClient(app)
         res = self._run(client.websocket('/echo', ws))
-        self.assertIsNone(res)
+        self.assertIsNone(res.body)
         self.assertEqual(results, [])
         Request.max_body_length = saved_max_body_length