feat: BinanceFuturesClient 구현

Made-with: Cursor

tests/test_exchange.py

@@ -0,0 +1,37 @@
+import pytest
+from unittest.mock import AsyncMock, MagicMock, patch
+from src.exchange import BinanceFuturesClient
+from src.config import Config
+import os
+
+
+@pytest.fixture
+def config():
+    os.environ.update({
+        "BINANCE_API_KEY": "test_key",
+        "BINANCE_API_SECRET": "test_secret",
+        "SYMBOL": "XRPUSDT",
+        "LEVERAGE": "10",
+        "RISK_PER_TRADE": "0.02",
+    })
+    return Config()
+
+
+@pytest.mark.asyncio
+async def test_set_leverage(config):
+    client = BinanceFuturesClient(config)
+    with patch.object(
+        client.client,
+        "futures_change_leverage",
+        return_value={"leverage": 10},
+    ):
+        result = await client.set_leverage(10)
+        assert result is not None
+
+
+def test_calculate_quantity(config):
+    client = BinanceFuturesClient(config)
+    # 잔고 1000 USDT, 리스크 2%, 레버리지 10, 가격 0.5
+    qty = client.calculate_quantity(balance=1000.0, price=0.5, leverage=10)
+    # 1000 * 0.02 * 10 / 0.5 = 400
+    assert qty == pytest.approx(400.0, rel=0.01)