annotate weight for SPLIT reasons

Author: khvn26

flag_engine/segments/evaluator.py

@@ -153,13 +153,13 @@ def get_flag_result_from_feature_context(
         start_percentage = 0.0
 
         for variant in variants:
-            limit = variant["weight"] + start_percentage
+            limit = (weight := variant["weight"]) + start_percentage
             if start_percentage <= percentage_value < limit:
                 return {
                     "enabled": feature_context["enabled"],
                     "feature_key": feature_context["feature_key"],
                     "name": feature_context["name"],
-                    "reason": "SPLIT",
+                    "reason": f"SPLIT; weight={weight}",
                     "value": variant["value"],
                 }
 

tests/unit/segments/test_segments_evaluator.py

@@ -676,7 +676,7 @@ def test_get_evaluation_result__returns_expected(
                 "enabled": False,
                 "feature_key": "1",
                 "name": "my_feature",
-                "reason": "SPLIT",
+                "reason": "SPLIT; weight=30",
                 "value": "foo",
             },
         ),
@@ -686,7 +686,7 @@ def test_get_evaluation_result__returns_expected(
                 "enabled": False,
                 "feature_key": "1",
                 "name": "my_feature",
-                "reason": "SPLIT",
+                "reason": "SPLIT; weight=30",
                 "value": "bar",
             },
         ),