fix: refresh same-day OHLCV bars

tests/unit/test_ingestion_service.py

@@ -6,6 +6,8 @@ from datetime import date, timedelta
 
 import pytest
 
+from app.models.ohlcv import OHLCVRecord
+from app.models.settings import IngestionProgress
 from app.models.ticker import Ticker
 from app.providers.protocol import OHLCVData
 from app.services import ingestion_service as svc
@@ -18,9 +20,12 @@ async def session():
         yield s
 
 
-async def _add_ticker(session, symbol: str) -> None:
-    session.add(Ticker(symbol=symbol))
+async def _add_ticker(session, symbol: str) -> Ticker:
+    ticker = Ticker(symbol=symbol)
+    session.add(ticker)
     await session.commit()
+    await session.refresh(ticker)
+    return ticker
 
 
 def _bars(symbol: str, n: int) -> list[OHLCVData]:
@@ -51,6 +56,50 @@ async def test_happy_path_ingests_bars(session):
     assert result.records_ingested == 3
 
 
+async def test_incremental_fetch_overlaps_latest_session_and_updates_partial_bar(session):
+    """Once today exists, a live refresh must fetch and overwrite it again."""
+    ticker = await _add_ticker(session, "LIVE")
+    today = date.today()
+    session.add_all([
+        OHLCVRecord(
+            ticker_id=ticker.id,
+            date=today - timedelta(days=i),
+            open=100.0,
+            high=101.0,
+            low=99.0,
+            close=100.0,
+            volume=1000,
+        )
+        for i in range(200)
+    ])
+    session.add(IngestionProgress(ticker_id=ticker.id, last_ingested_date=today))
+    await session.commit()
+
+    provider = MockMarketDataProvider(ohlcv_data=[
+        OHLCVData(
+            ticker="LIVE",
+            date=today,
+            open=100.0,
+            high=124.0,
+            low=99.0,
+            close=123.0,
+            volume=2000,
+        )
+    ])
+    result = await svc.fetch_and_ingest(session, provider, "LIVE")
+
+    assert provider.calls == [{
+        "ticker": "LIVE",
+        "start_date": today,
+        "end_date": today,
+    }]
+    assert result.status == "complete"
+    assert result.records_ingested == 1
+    records = await svc.price_service.query_ohlcv(session, "LIVE", today, today)
+    assert records[0].close == 123.0
+    assert records[0].volume == 2000
+
+
 async def test_empty_fetch_with_existing_history_is_up_to_date(session):
     # Covered ticker, just no new bars in the window → complete, not no_data.
     await _add_ticker(session, "BBB")