test: reject unsorted rebalance dates

2026-08-21 21:25:11 +08:00
parent 0a236622f3
commit b4f7b74c04
1 changed files with 10 additions and 0 deletions
@@ -141,6 +141,16 @@ def test_weight_table_rejects_duplicate_rebalance_dates() -> None:
        scores_to_weight_table(scores, top_k=1)


+def test_weight_table_rejects_unsorted_rebalance_dates() -> None:
+    scores = pd.DataFrame(
+        {"A": [1.0, 2.0]},
+        index=pd.to_datetime(["2026-01-07", "2026-01-05"]),
+    )
+
+    with pytest.raises(ValueError, match="chronological order"):
+        scores_to_weight_table(scores, top_k=1)
+
+
 def test_weight_table_rejects_non_numeric_scores() -> None:
    scores = pd.DataFrame({"A": ["high"], "B": ["low"]})