Make more tests pass

Author: syrusakbary

src/graphql_server/http/async_base_view.py

@@ -350,6 +350,11 @@ async def run(
         ):
             raise HTTPException(400, "Variables must be a JSON object")
 
+        if request_data.extensions is not None and not isinstance(
+            request_data.extensions, dict
+        ):
+            raise HTTPException(400, "Extensions must be a JSON object")
+
         allowed_operation_types = operation_type_from_http(request_adapter.method)
 
         if request_adapter.method == "GET":

src/graphql_server/http/sync_base_view.py

@@ -212,6 +212,11 @@ def run(
         ):
             raise HTTPException(400, "Variables must be a JSON object")
 
+        if request_data.extensions is not None and not isinstance(
+            request_data.extensions, dict
+        ):
+            raise HTTPException(400, "Extensions must be a JSON object")
+
         allowed_operation_types = operation_type_from_http(request_adapter.method)
 
         if request_adapter.method == "GET":

src/tests/http/test_graphql_over_http_spec.py

@@ -455,9 +455,6 @@ async def test_6a70(http_client):
     assert "errors" not in response.json
 
 
-@pytest.mark.xfail(
-    reason="OPTIONAL - Currently not supported by GraphQL-Server", raises=AssertionError
-)
 @pytest.mark.parametrize(
     "invalid",
     ["string", 0, False, ["array"]],