feat(CORE-001D): close remaining boundary cleanup slices

tests/test_backtesting.py

@@ -10,6 +10,7 @@ from app.models.strategy_template import EntryPolicy, RollPolicy, StrategyTempla
 from app.services.backtesting.historical_provider import (
     DailyClosePoint,
     SyntheticHistoricalProvider,
+    SyntheticOptionQuote,
     YFinanceHistoricalPriceSource,
 )
 from app.services.backtesting.service import BacktestService
@@ -209,6 +210,50 @@ def test_backtest_rejects_unsupported_template_behaviors(field: str, value: obje
         service._validate_template_for_mvp(unsupported_template)
 
 
+def test_yfinance_price_source_normalizes_valid_daily_close_row() -> None:
+    point = YFinanceHistoricalPriceSource._normalize_daily_close_row(
+        row_date=pd.Timestamp("2024-01-03T00:00:00Z"),
+        close=96.0,
+    )
+
+    assert point == DailyClosePoint(date=date(2024, 1, 3), close=96.0)
+
+
+def test_yfinance_price_source_rejects_invalid_daily_close_row_types() -> None:
+    with pytest.raises(TypeError, match="historical row date must support .date"):
+        YFinanceHistoricalPriceSource._normalize_daily_close_row(row_date="2024-01-03", close=96.0)
+
+    with pytest.raises(ValueError, match="historical close must be finite"):
+        YFinanceHistoricalPriceSource._normalize_daily_close_row(
+            row_date=pd.Timestamp("2024-01-03T00:00:00Z"),
+            close=float("nan"),
+        )
+
+
+def test_synthetic_option_quote_rejects_invalid_field_types() -> None:
+    with pytest.raises(TypeError, match="spot must be a finite number"):
+        SyntheticOptionQuote(
+            position_id="pos-1",
+            leg_id="leg-1",
+            spot="bad",  # type: ignore[arg-type]
+            strike=100.0,
+            expiry=date(2025, 1, 1),
+            quantity=1.0,
+            mark=5.0,
+        )
+
+    with pytest.raises(ValueError, match="mark must be non-negative"):
+        SyntheticOptionQuote(
+            position_id="pos-1",
+            leg_id="leg-1",
+            spot=100.0,
+            strike=100.0,
+            expiry=date(2025, 1, 1),
+            quantity=1.0,
+            mark=-1.0,
+        )
+
+
 def test_yfinance_price_source_treats_end_date_inclusively(monkeypatch: pytest.MonkeyPatch) -> None:
     calls: list[tuple[str, str, str]] = []