Remove deprecated modules and files related to the backtesting framework, including backtest.py, cli.py, config.py, data.py, intrabar.py, logging_utils.py, market_costs.py, metrics.py, trade.py, and supertrend indicators. Introduce a new structure for the backtesting engine with improved organization and functionality, including a CLI handler, data manager, and reporting capabilities. Update dependencies in pyproject.toml to support the new architecture.

tests/test_data_manager.py

@@ -0,0 +1,69 @@
+"""Tests for DataManager functionality."""
+import pytest
+
+from engine.data_manager import DataManager
+from engine.market import MarketType
+
+
+class TestDataManager:
+    """Test suite for DataManager class."""
+    
+    def test_init_creates_data_dir(self, tmp_path):
+        """Test that DataManager creates data directory on init."""
+        data_dir = tmp_path / "test_data"
+        dm = DataManager(data_dir=str(data_dir))
+        assert data_dir.exists()
+    
+    def test_get_data_path_spot(self, tmp_path):
+        """Test data path generation for spot market."""
+        dm = DataManager(data_dir=str(tmp_path))
+        path = dm._get_data_path("okx", "BTC/USDT", "1m", MarketType.SPOT)
+        
+        expected = tmp_path / "okx" / "spot" / "BTC-USDT" / "1m.csv"
+        assert path == expected
+    
+    def test_get_data_path_perpetual(self, tmp_path):
+        """Test data path generation for perpetual market."""
+        dm = DataManager(data_dir=str(tmp_path))
+        path = dm._get_data_path("okx", "BTC/USDT", "1h", MarketType.PERPETUAL)
+        
+        expected = tmp_path / "okx" / "perpetual" / "BTC-USDT" / "1h.csv"
+        assert path == expected
+    
+    def test_load_data_file_not_found(self, tmp_path):
+        """Test that load_data raises FileNotFoundError for missing data."""
+        dm = DataManager(data_dir=str(tmp_path))
+        
+        with pytest.raises(FileNotFoundError):
+            dm.load_data("okx", "BTC/USDT", "1m", MarketType.SPOT)
+
+
+@pytest.mark.network
+class TestDataManagerDownload:
+    """Tests requiring network access (marked for selective running)."""
+    
+    def test_download_spot_data(self):
+        """Test downloading spot market data."""
+        dm = DataManager()
+        df = dm.download_data(
+            "okx", "BTC/USDT", "1m", 
+            start_date="2025-01-01", 
+            market_type=MarketType.SPOT
+        )
+        
+        assert df is not None
+        assert 'open' in df.columns
+        assert 'close' in df.columns
+    
+    def test_download_perpetual_data(self):
+        """Test downloading perpetual market data."""
+        dm = DataManager()
+        df = dm.download_data(
+            "okx", "BTC/USDT", "1m", 
+            start_date="2025-01-01", 
+            market_type=MarketType.PERPETUAL
+        )
+        
+        assert df is not None
+        assert 'open' in df.columns
+        assert 'close' in df.columns