Add schema.execute test, too

Author: rmosolgo

lib/graphql/schema.rb

@@ -1117,7 +1117,7 @@ def possible_types(type = nil, context = GraphQL::Query::NullContext)
               next true unless type.kind.interface?
               next true unless possible_type.kind.object?
 
-              # Use `.graphql_name` comparison to match legacy vs class-based types. 
+              # Use `.graphql_name` comparison to match legacy vs class-based types.
               # When we don't need to support legacy `.define` types, use `.include?(type)` instead.
               possible_type.interfaces(context).any? { |interface| interface.graphql_name == type.graphql_name }
             end if stored_possible_types

spec/graphql/analysis/ast/max_query_depth_spec.rb

@@ -145,6 +145,10 @@
 
     it "returns an error" do
       assert_equal ["This query is too large to execute."], query.result["errors"].map { |err| err["message"] }
+
+      # Make sure `Schema.execute` works too
+      execute_result = schema.execute(query_string)
+      assert_equal ["This query is too large to execute."], execute_result["errors"].map { |err| err["message"] }
     end
   end
 end