test: add unit tests for scheduled Bitcoin price job handler

backend/tests/test_price_history.py

@@ -1,5 +1,6 @@
 """Tests for price history feature."""
 
+from contextlib import asynccontextmanager
 from datetime import UTC, datetime
 from unittest.mock import AsyncMock, MagicMock, patch
 
@@ -7,6 +8,7 @@ import pytest
 
 from models import PriceHistory
 from price_fetcher import fetch_btc_eur_price
+from worker import process_bitcoin_price_job
 
 
 class TestFetchBtcEurPrice:
@@ -238,3 +240,91 @@ class TestManualFetch:
         data = response.json()
         assert len(data) == 1
         assert data[0]["price"] == 87654.32
+
+
+def create_mock_pool(mock_conn: AsyncMock) -> MagicMock:
+    """Create a mock asyncpg pool with proper async context manager behavior."""
+    mock_pool = MagicMock()
+
+    @asynccontextmanager
+    async def mock_acquire():
+        yield mock_conn
+
+    mock_pool.acquire = mock_acquire
+    return mock_pool
+
+
+class TestProcessBitcoinPriceJob:
+    """Tests for the scheduled Bitcoin price job handler."""
+
+    @pytest.mark.asyncio
+    async def test_stores_price_on_success(self):
+        """Verify price is stored in database on successful fetch."""
+        mock_response = MagicMock()
+        mock_response.json.return_value = [0, 0, 0, 0, 0, 0, 95000.0, 0, 0, 0]
+        mock_response.raise_for_status = MagicMock()
+
+        mock_http_client = AsyncMock()
+        mock_http_client.get.return_value = mock_response
+        mock_http_client.__aenter__.return_value = mock_http_client
+        mock_http_client.__aexit__.return_value = None
+
+        mock_conn = AsyncMock()
+        mock_pool = create_mock_pool(mock_conn)
+
+        with patch("price_fetcher.httpx.AsyncClient", return_value=mock_http_client):
+            await process_bitcoin_price_job(mock_pool)
+
+        # Verify execute was called with correct values
+        mock_conn.execute.assert_called_once()
+        call_args = mock_conn.execute.call_args
+
+        # Check the SQL parameters
+        assert call_args[0][1] == "bitfinex"  # source
+        assert call_args[0][2] == "BTC/EUR"  # pair
+        assert call_args[0][3] == 95000.0  # price
+
+    @pytest.mark.asyncio
+    async def test_fails_silently_on_api_error(self):
+        """Verify no exception is raised and no DB insert on API error."""
+        import httpx
+
+        mock_response = MagicMock()
+        mock_response.raise_for_status.side_effect = httpx.HTTPStatusError(
+            "Server Error", request=MagicMock(), response=MagicMock()
+        )
+
+        mock_http_client = AsyncMock()
+        mock_http_client.get.return_value = mock_response
+        mock_http_client.__aenter__.return_value = mock_http_client
+        mock_http_client.__aexit__.return_value = None
+
+        mock_conn = AsyncMock()
+        mock_pool = create_mock_pool(mock_conn)
+
+        with patch("price_fetcher.httpx.AsyncClient", return_value=mock_http_client):
+            # Should not raise an exception
+            await process_bitcoin_price_job(mock_pool)
+
+        # Should not have called execute
+        mock_conn.execute.assert_not_called()
+
+    @pytest.mark.asyncio
+    async def test_fails_silently_on_db_error(self):
+        """Verify no exception is raised on database error."""
+        mock_response = MagicMock()
+        mock_response.json.return_value = [0, 0, 0, 0, 0, 0, 95000.0, 0, 0, 0]
+        mock_response.raise_for_status = MagicMock()
+
+        mock_http_client = AsyncMock()
+        mock_http_client.get.return_value = mock_response
+        mock_http_client.__aenter__.return_value = mock_http_client
+        mock_http_client.__aexit__.return_value = None
+
+        mock_conn = AsyncMock()
+        mock_conn.execute.side_effect = Exception("Database connection error")
+        mock_pool = create_mock_pool(mock_conn)
+
+        with patch("price_fetcher.httpx.AsyncClient", return_value=mock_http_client):
+            # Should not raise an exception
+            await process_bitcoin_price_job(mock_pool)

backend/worker.py

@@ -98,6 +98,36 @@ def register_job_handlers(qm: QueueManager, db_pool: asyncpg.Pool) -> None:
         await process_random_number_job(job, db_pool)
 
 
+async def process_bitcoin_price_job(db_pool: asyncpg.Pool) -> None:
+    """
+    Fetch and store Bitcoin price from Bitfinex.
+
+    This function is designed to fail silently - exceptions are caught and logged
+    so the scheduler can continue with the next scheduled run.
+    """
+    try:
+        price, timestamp = await fetch_btc_eur_price()
+
+        async with db_pool.acquire() as conn:
+            await conn.execute(
+                """
+                INSERT INTO price_history
+                    (source, pair, price, timestamp, created_at)
+                VALUES ($1, $2, $3, $4, NOW())
+                ON CONFLICT (source, pair, timestamp) DO NOTHING
+                """,
+                "bitfinex",
+                "BTC/EUR",
+                price,
+                timestamp,
+            )
+
+        logger.info(f"Fetched BTC/EUR price: €{price:.2f}")
+    except Exception as e:
+        # Fail silently - next scheduled job will continue
+        logger.error(f"Failed to fetch Bitcoin price: {e}")
+
+
 def register_scheduled_jobs(sm: SchedulerManager, db_pool: asyncpg.Pool) -> None:
     """Register all scheduled jobs with the scheduler manager."""
 
@@ -105,27 +135,7 @@ def register_scheduled_jobs(sm: SchedulerManager, db_pool: asyncpg.Pool) -> None
     @sm.schedule(JOB_FETCH_BITCOIN_PRICE, "* * * * *")
     async def fetch_bitcoin_price(schedule: Schedule) -> None:
         """Fetch Bitcoin price from Bitfinex every minute."""
-        try:
-            price, timestamp = await fetch_btc_eur_price()
-
-            async with db_pool.acquire() as conn:
-                await conn.execute(
-                    """
-                    INSERT INTO price_history
-                        (source, pair, price, timestamp, created_at)
-                    VALUES ($1, $2, $3, $4, NOW())
-                    ON CONFLICT (source, pair, timestamp) DO NOTHING
-                    """,
-                    "bitfinex",
-                    "BTC/EUR",
-                    price,
-                    timestamp,
-                )
-
-            logger.info(f"Fetched BTC/EUR price: €{price:.2f}")
-        except Exception as e:
-            # Fail silently - next scheduled job will continue
-            logger.error(f"Failed to fetch Bitcoin price: {e}")
+        await process_bitcoin_price_job(db_pool)
 
 
 async def main() -> None: