Fix bug on prepared request in graph client

msgraph/core/_graph_client.py

@@ -142,7 +142,17 @@ def _graph_url(self, url: str) -> str:
 
     @attach_context
     def prepare_request(self, method, url, **kwargs):
-        req = Request(method, url, **kwargs)
+        req = Request(
+            method,
+            url,
+            headers=kwargs.get('headers'),
+            files=kwargs.get('files'),
+            data=kwargs.get('data'),
+            json=kwargs.get('json'),
+            params=kwargs.get('params'),
+            cookies=kwargs.get('cookies'),
+            hooks=kwargs.get('hooks'),
+        )
         prepared = Session().prepare_request(req)
         return prepared
 

tests/integration/test_graphclient.py

@@ -96,3 +96,19 @@ def test_graph_client_picks_options_from_kwargs():
     assert response.status_code == 200
     assert 'scopes' in response.request.context.middleware_control.keys()
     assert response.request.context.middleware_control['scopes'] == scopes
+
+
+def test_graph_client_allows_passing_optional_kwargs():
+    """
+    Test the graph client allows passing optional kwargs native to the requests library
+    such as stream, proxy and cert.
+    """
+    credential = _CustomTokenCredential()
+    scopes = ['User.Read.All']
+    client = GraphClient(credential=credential)
+    response = client.get(
+        'https://proxy.apisandbox.msdn.microsoft.com/svc?url=https://graph.microsoft.com/v1.0/me',
+        scopes=scopes,
+        stream=True
+    )
+    assert response.status_code == 200