test: check weights match (#4649)

* test: check weights match

* sort weights for sparse

* lint

test/run_tests_model_gen_and_load.py

@@ -179,7 +179,15 @@ def load_model(
         weights_dir = working_dir / "test_weights"
         weights_dir.mkdir(parents=True, exist_ok=True)
         weight_file = str(weights_dir / f"weights_{test_id}.json")
+
+        # Load old weights
         old_weights = json.load(open(weight_file))
+
+        # Sort the weights inside both dictionaries based on 'index'
+        new_weights["weights"].sort(key=lambda x: x["index"])
+        old_weights["weights"].sort(key=lambda x: x["index"])
+
+        # Assert if both sorted weights are equal
         assert new_weights == old_weights
         vw.finish()
     except Exception as e: