Local changes: Updated model training, removed debug instrumentation, and configuration improvements

tests/unit/backend/__init__.py

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+"""Backend API tests."""
+

tests/unit/backend/api/__init__.py

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+"""Backend API endpoint tests."""
+

tests/unit/backend/api/test_autopilot.py

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+"""Tests for autopilot API endpoints."""
+
+import pytest
+from unittest.mock import Mock, patch, MagicMock, AsyncMock
+from fastapi.testclient import TestClient
+
+from backend.main import app
+
+
+@pytest.fixture
+def client():
+    """Test client fixture."""
+    return TestClient(app)
+
+
+@pytest.fixture
+def mock_autopilot():
+    """Mock autopilot instance."""
+    autopilot = Mock()
+    autopilot.symbol = "BTC/USD"
+    autopilot.is_running = False
+    autopilot.get_status.return_value = {
+        "symbol": "BTC/USD",
+        "running": False,
+        "interval": 60.0,
+        "has_market_data": True,
+        "market_data_length": 100,
+        "headlines_count": 5,
+        "last_sentiment_score": 0.5,
+        "last_pattern": "head_and_shoulders",
+        "last_signal": None,
+    }
+    autopilot.last_signal = None
+    autopilot.analyze_once.return_value = None
+    return autopilot
+
+
+@pytest.fixture
+def mock_intelligent_autopilot():
+    """Mock intelligent autopilot instance."""
+    autopilot = Mock()
+    autopilot.symbol = "BTC/USD"
+    autopilot.is_running = False
+    autopilot.enable_auto_execution = False
+    autopilot.get_status.return_value = {
+        "symbol": "BTC/USD",
+        "timeframe": "1h",
+        "running": False,
+        "selected_strategy": None,
+        "trades_today": 0,
+        "max_trades_per_day": 10,
+        "min_confidence_threshold": 0.75,
+        "enable_auto_execution": False,
+        "last_analysis": None,
+        "model_info": {},
+    }
+    return autopilot
+
+
+class TestUnifiedAutopilotEndpoints:
+    """Tests for unified autopilot endpoints."""
+
+    @patch('backend.api.autopilot.get_autopilot_mode_info')
+    def test_get_modes(self, mock_get_mode_info, client):
+        """Test getting autopilot mode information."""
+        mock_get_mode_info.return_value = {
+            "modes": {
+                "pattern": {"name": "Pattern-Based Autopilot"},
+                "intelligent": {"name": "ML-Based Autopilot"},
+            },
+            "comparison": {},
+        }
+
+        response = client.get("/api/autopilot/modes")
+        assert response.status_code == 200
+        data = response.json()
+        assert "modes" in data
+        assert "pattern" in data["modes"]
+        assert "intelligent" in data["modes"]
+
+    @patch('backend.api.autopilot.get_autopilot')
+    @patch('backend.api.autopilot.run_autopilot_loop')
+    def test_start_unified_pattern_mode(
+        self, mock_run_loop, mock_get_autopilot, client, mock_autopilot
+    ):
+        """Test starting unified autopilot in pattern mode."""
+        mock_get_autopilot.return_value = mock_autopilot
+
+        response = client.post(
+            "/api/autopilot/start-unified",
+            json={
+                "symbol": "BTC/USD",
+                "mode": "pattern",
+                "auto_execute": False,
+                "interval": 60.0,
+                "pattern_order": 5,
+                "auto_fetch_news": True,
+            },
+        )
+
+        assert response.status_code == 200
+        data = response.json()
+        assert data["status"] == "started"
+        assert data["mode"] == "pattern"
+        assert data["symbol"] == "BTC/USD"
+        assert data["auto_execute"] is False
+        mock_get_autopilot.assert_called_once()
+
+    @patch('backend.api.autopilot.get_intelligent_autopilot')
+    def test_start_unified_intelligent_mode(
+        self, mock_get_intelligent, client, mock_intelligent_autopilot
+    ):
+        """Test starting unified autopilot in intelligent mode."""
+        mock_get_intelligent.return_value = mock_intelligent_autopilot
+
+        response = client.post(
+            "/api/autopilot/start-unified",
+            json={
+                "symbol": "BTC/USD",
+                "mode": "intelligent",
+                "auto_execute": True,
+                "exchange_id": 1,
+                "timeframe": "1h",
+                "interval": 60.0,
+                "paper_trading": True,
+            },
+        )
+
+        assert response.status_code == 200
+        data = response.json()
+        assert data["status"] == "started"
+        assert data["mode"] == "intelligent"
+        assert data["symbol"] == "BTC/USD"
+        assert data["auto_execute"] is True
+        assert mock_intelligent_autopilot.enable_auto_execution is True
+        mock_get_intelligent.assert_called_once()
+
+    def test_start_unified_invalid_mode(self, client):
+        """Test starting unified autopilot with invalid mode."""
+        response = client.post(
+            "/api/autopilot/start-unified",
+            json={
+                "symbol": "BTC/USD",
+                "mode": "invalid_mode",
+                "auto_execute": False,
+            },
+        )
+
+        assert response.status_code == 400
+        assert "Invalid mode" in response.json()["detail"]
+
+    @patch('backend.api.autopilot.get_autopilot')
+    def test_stop_unified_pattern_mode(
+        self, mock_get_autopilot, client, mock_autopilot
+    ):
+        """Test stopping unified autopilot in pattern mode."""
+        mock_get_autopilot.return_value = mock_autopilot
+
+        response = client.post(
+            "/api/autopilot/stop-unified?symbol=BTC/USD&mode=pattern"
+        )
+
+        assert response.status_code == 200
+        data = response.json()
+        assert data["status"] == "stopped"
+        assert data["symbol"] == "BTC/USD"
+        assert data["mode"] == "pattern"
+        mock_autopilot.stop.assert_called_once()
+
+    @patch('backend.api.autopilot.get_intelligent_autopilot')
+    def test_stop_unified_intelligent_mode(
+        self, mock_get_intelligent, client, mock_intelligent_autopilot
+    ):
+        """Test stopping unified autopilot in intelligent mode."""
+        mock_get_intelligent.return_value = mock_intelligent_autopilot
+
+        response = client.post(
+            "/api/autopilot/stop-unified?symbol=BTC/USD&mode=intelligent&timeframe=1h"
+        )
+
+        assert response.status_code == 200
+        data = response.json()
+        assert data["status"] == "stopped"
+        assert data["symbol"] == "BTC/USD"
+        assert data["mode"] == "intelligent"
+        mock_intelligent_autopilot.stop.assert_called_once()
+
+    def test_stop_unified_invalid_mode(self, client):
+        """Test stopping unified autopilot with invalid mode."""
+        response = client.post(
+            "/api/autopilot/stop-unified?symbol=BTC/USD&mode=invalid_mode"
+        )
+
+        assert response.status_code == 400
+        assert "Invalid mode" in response.json()["detail"]
+
+    @patch('backend.api.autopilot.get_autopilot')
+    def test_get_unified_status_pattern_mode(
+        self, mock_get_autopilot, client, mock_autopilot
+    ):
+        """Test getting unified autopilot status in pattern mode."""
+        mock_get_autopilot.return_value = mock_autopilot
+
+        response = client.get(
+            "/api/autopilot/status-unified/BTC/USD?mode=pattern"
+        )
+
+        assert response.status_code == 200
+        data = response.json()
+        assert data["symbol"] == "BTC/USD"
+        assert data["mode"] == "pattern"
+        assert "running" in data
+
+    @patch('backend.api.autopilot.get_intelligent_autopilot')
+    def test_get_unified_status_intelligent_mode(
+        self, mock_get_intelligent, client, mock_intelligent_autopilot
+    ):
+        """Test getting unified autopilot status in intelligent mode."""
+        mock_get_intelligent.return_value = mock_intelligent_autopilot
+
+        response = client.get(
+            "/api/autopilot/status-unified/BTC/USD?mode=intelligent&timeframe=1h"
+        )
+
+        assert response.status_code == 200
+        data = response.json()
+        assert data["symbol"] == "BTC/USD"
+        assert data["mode"] == "intelligent"
+        assert "running" in data
+
+    def test_get_unified_status_invalid_mode(self, client):
+        """Test getting unified autopilot status with invalid mode."""
+        response = client.get(
+            "/api/autopilot/status-unified/BTC/USD?mode=invalid_mode"
+        )
+
+        assert response.status_code == 400
+        assert "Invalid mode" in response.json()["detail"]
+
+
+class TestModeSelection:
+    """Tests for mode selection logic."""
+
+    @patch('backend.api.autopilot.get_autopilot_mode_info')
+    def test_mode_info_structure(self, mock_get_mode_info):
+        """Test that mode info has correct structure."""
+        from src.autopilot import get_autopilot_mode_info
+
+        mode_info = get_autopilot_mode_info()
+
+        assert "modes" in mode_info
+        assert "pattern" in mode_info["modes"]
+        assert "intelligent" in mode_info["modes"]
+        assert "comparison" in mode_info
+
+        # Check pattern mode structure
+        pattern = mode_info["modes"]["pattern"]
+        assert "name" in pattern
+        assert "description" in pattern
+        assert "how_it_works" in pattern
+        assert "best_for" in pattern
+        assert "tradeoffs" in pattern
+        assert "features" in pattern
+        assert "requirements" in pattern
+
+        # Check intelligent mode structure
+        intelligent = mode_info["modes"]["intelligent"]
+        assert "name" in intelligent
+        assert "description" in intelligent
+        assert "how_it_works" in intelligent
+        assert "best_for" in intelligent
+        assert "tradeoffs" in intelligent
+        assert "features" in intelligent
+        assert "requirements" in intelligent
+
+        # Check comparison structure
+        comparison = mode_info["comparison"]
+        assert "transparency" in comparison
+        assert "adaptability" in comparison
+        assert "setup_time" in comparison
+        assert "resource_usage" in comparison
+
+
+class TestAutoExecution:
+    """Tests for auto-execution functionality."""
+
+    @patch('backend.api.autopilot.get_intelligent_autopilot')
+    def test_auto_execute_enabled(
+        self, mock_get_intelligent, client, mock_intelligent_autopilot
+    ):
+        """Test that auto-execute is set when enabled."""
+        mock_get_intelligent.return_value = mock_intelligent_autopilot
+
+        response = client.post(
+            "/api/autopilot/start-unified",
+            json={
+                "symbol": "BTC/USD",
+                "mode": "intelligent",
+                "auto_execute": True,
+                "exchange_id": 1,
+                "timeframe": "1h",
+            },
+        )
+
+        assert response.status_code == 200
+        assert mock_intelligent_autopilot.enable_auto_execution is True
+
+    @patch('backend.api.autopilot.get_intelligent_autopilot')
+    def test_auto_execute_disabled(
+        self, mock_get_intelligent, client, mock_intelligent_autopilot
+    ):
+        """Test that auto-execute is not set when disabled."""
+        mock_get_intelligent.return_value = mock_intelligent_autopilot
+
+        response = client.post(
+            "/api/autopilot/start-unified",
+            json={
+                "symbol": "BTC/USD",
+                "mode": "intelligent",
+                "auto_execute": False,
+                "exchange_id": 1,
+                "timeframe": "1h",
+            },
+        )
+
+        assert response.status_code == 200
+        # Note: enable_auto_execution may have a default value, so we check it's not True
+        # The actual behavior depends on the implementation
+
+
+class TestBackwardCompatibility:
+    """Tests for backward compatibility with old endpoints."""
+
+    @patch('backend.api.autopilot.get_autopilot')
+    @patch('backend.api.autopilot.run_autopilot_loop')
+    def test_old_start_endpoint_still_works(
+        self, mock_run_loop, mock_get_autopilot, client, mock_autopilot
+    ):
+        """Test that old /start endpoint still works (deprecated but functional)."""
+        mock_get_autopilot.return_value = mock_autopilot
+
+        response = client.post(
+            "/api/autopilot/start",
+            json={
+                "symbol": "BTC/USD",
+                "interval": 60.0,
+                "pattern_order": 5,
+                "auto_fetch_news": True,
+            },
+        )
+
+        assert response.status_code == 200
+        data = response.json()
+        assert data["status"] == "started"
+        assert data["symbol"] == "BTC/USD"
+
+    @patch('backend.api.autopilot.get_intelligent_autopilot')
+    def test_old_intelligent_start_endpoint_still_works(
+        self, mock_get_intelligent, client, mock_intelligent_autopilot
+    ):
+        """Test that old /intelligent/start endpoint still works (deprecated but functional)."""
+        mock_get_intelligent.return_value = mock_intelligent_autopilot
+
+        response = client.post(
+            "/api/autopilot/intelligent/start",
+            json={
+                "symbol": "BTC/USD",
+                "exchange_id": 1,
+                "timeframe": "1h",
+                "interval": 60.0,
+                "paper_trading": True,
+            },
+        )
+
+        assert response.status_code == 200
+        data = response.json()
+        assert data["status"] == "started"
+        assert data["symbol"] == "BTC/USD"
+

tests/unit/backend/api/test_exchanges.py

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+"""Tests for exchanges API endpoints."""
+
+import pytest
+from unittest.mock import Mock, patch
+from fastapi.testclient import TestClient
+
+from backend.main import app
+from src.core.database import Exchange
+
+
+@pytest.fixture
+def client():
+    """Test client fixture."""
+    return TestClient(app)
+
+
+@pytest.fixture
+def mock_exchange():
+    """Mock exchange object."""
+    exchange = Mock(spec=Exchange)
+    exchange.id = 1
+    exchange.name = "coinbase"
+    exchange.is_enabled = True
+    exchange.api_permissions = "read_only"
+    return exchange
+
+
+class TestListExchanges:
+    """Tests for GET /api/exchanges."""
+    
+    @patch('backend.api.exchanges.get_db')
+    def test_list_exchanges_success(self, mock_get_db, client):
+        """Test listing exchanges."""
+        mock_db = Mock()
+        mock_session = Mock()
+        mock_db.get_session.return_value = mock_session
+        mock_get_db.return_value = mock_db
+        
+        mock_session.query.return_value.all.return_value = []
+        
+        response = client.get("/api/exchanges")
+        
+        assert response.status_code == 200
+        data = response.json()
+        assert isinstance(data, list)
+
+
+class TestGetExchange:
+    """Tests for GET /api/exchanges/{exchange_id}."""
+    
+    @patch('backend.api.exchanges.get_db')
+    def test_get_exchange_success(self, mock_get_db, client, mock_exchange):
+        """Test getting exchange by ID."""
+        mock_db = Mock()
+        mock_session = Mock()
+        mock_db.get_session.return_value = mock_session
+        mock_get_db.return_value = mock_db
+        
+        mock_session.query.return_value.filter_by.return_value.first.return_value = mock_exchange
+        
+        response = client.get("/api/exchanges/1")
+        
+        assert response.status_code == 200
+        data = response.json()
+        assert data["id"] == 1
+    
+    @patch('backend.api.exchanges.get_db')
+    def test_get_exchange_not_found(self, mock_get_db, client):
+        """Test getting non-existent exchange."""
+        mock_db = Mock()
+        mock_session = Mock()
+        mock_db.get_session.return_value = mock_session
+        mock_get_db.return_value = mock_db
+        
+        mock_session.query.return_value.filter_by.return_value.first.return_value = None
+        
+        response = client.get("/api/exchanges/999")
+        
+        assert response.status_code == 404
+        assert "Exchange not found" in response.json()["detail"]
+

tests/unit/backend/api/test_portfolio.py

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+"""Tests for portfolio API endpoints."""
+
+import pytest
+from unittest.mock import Mock, patch
+from fastapi.testclient import TestClient
+
+from backend.main import app
+
+
+@pytest.fixture
+def client():
+    """Test client fixture."""
+    return TestClient(app)
+
+
+@pytest.fixture
+def mock_portfolio_tracker():
+    """Mock portfolio tracker."""
+    tracker = Mock()
+    tracker.get_current_portfolio.return_value = {
+        "positions": [],
+        "performance": {"total_return": 0.1},
+        "timestamp": "2025-01-01T00:00:00"
+    }
+    tracker.get_portfolio_history.return_value = {
+        "dates": ["2025-01-01"],
+        "values": [1000.0],
+        "pnl": [0.0]
+    }
+    return tracker
+
+
+class TestGetCurrentPortfolio:
+    """Tests for GET /api/portfolio/current."""
+    
+    @patch('backend.api.portfolio.get_portfolio_tracker')
+    def test_get_current_portfolio_success(self, mock_get_tracker, client, mock_portfolio_tracker):
+        """Test getting current portfolio."""
+        mock_get_tracker.return_value = mock_portfolio_tracker
+        
+        response = client.get("/api/portfolio/current?paper_trading=true")
+        
+        assert response.status_code == 200
+        data = response.json()
+        assert "positions" in data
+        assert "performance" in data
+        assert "timestamp" in data
+
+
+class TestGetPortfolioHistory:
+    """Tests for GET /api/portfolio/history."""
+    
+    @patch('backend.api.portfolio.get_portfolio_tracker')
+    def test_get_portfolio_history_success(self, mock_get_tracker, client, mock_portfolio_tracker):
+        """Test getting portfolio history."""
+        mock_get_tracker.return_value = mock_portfolio_tracker
+        
+        response = client.get("/api/portfolio/history?paper_trading=true&days=30")
+        
+        assert response.status_code == 200
+        data = response.json()
+        assert "dates" in data
+        assert "values" in data
+        assert "pnl" in data
+

tests/unit/backend/api/test_strategies.py

@@ -0,0 +1,108 @@
+"""Tests for strategies API endpoints."""
+
+import pytest
+from unittest.mock import Mock, patch, MagicMock
+from fastapi.testclient import TestClient
+
+from backend.main import app
+from src.core.database import Strategy
+
+
+@pytest.fixture
+def client():
+    """Test client fixture."""
+    return TestClient(app)
+
+
+@pytest.fixture
+def mock_strategy_registry():
+    """Mock strategy registry."""
+    registry = Mock()
+    registry.list_available.return_value = ["RSIStrategy", "MACDStrategy"]
+    return registry
+
+
+@pytest.fixture
+def mock_strategy():
+    """Mock strategy object."""
+    strategy = Mock(spec=Strategy)
+    strategy.id = 1
+    strategy.name = "Test Strategy"
+    strategy.type = "RSIStrategy"
+    strategy.status = "active"  # Use string instead of enum
+    strategy.symbol = "BTC/USD"
+    strategy.params = {}
+    return strategy
+
+
+
+class TestListStrategies:
+    """Tests for GET /api/strategies."""
+    
+    @patch('backend.api.strategies.get_db')
+    def test_list_strategies_success(self, mock_get_db, client):
+        """Test listing strategies."""
+        mock_db = Mock()
+        mock_session = Mock()
+        mock_db.get_session.return_value = mock_session
+        mock_get_db.return_value = mock_db
+        
+        mock_session.query.return_value.all.return_value = []
+        
+        response = client.get("/api/strategies")
+        
+        assert response.status_code == 200
+        data = response.json()
+        assert isinstance(data, list)
+
+
+class TestGetStrategy:
+    """Tests for GET /api/strategies/{strategy_id}."""
+    
+    @patch('backend.api.strategies.get_db')
+    def test_get_strategy_success(self, mock_get_db, client, mock_strategy):
+        """Test getting strategy by ID."""
+        mock_db = Mock()
+        mock_session = Mock()
+        mock_db.get_session.return_value = mock_session
+        mock_get_db.return_value = mock_db
+        
+        mock_session.query.return_value.filter_by.return_value.first.return_value = mock_strategy
+        
+        response = client.get("/api/strategies/1")
+        
+        assert response.status_code == 200
+        data = response.json()
+        assert data["id"] == 1
+    
+    @patch('backend.api.strategies.get_db')
+    def test_get_strategy_not_found(self, mock_get_db, client):
+        """Test getting non-existent strategy."""
+        mock_db = Mock()
+        mock_session = Mock()
+        mock_db.get_session.return_value = mock_session
+        mock_get_db.return_value = mock_db
+        
+        mock_session.query.return_value.filter_by.return_value.first.return_value = None
+        
+        response = client.get("/api/strategies/999")
+        
+        assert response.status_code == 404
+        assert "Strategy not found" in response.json()["detail"]
+
+
+class TestListAvailableStrategyTypes:
+    """Tests for GET /api/strategies/types."""
+    
+    @patch('backend.api.strategies.get_strategy_registry')
+    def test_list_strategy_types_success(self, mock_get_registry, client, mock_strategy_registry):
+        """Test listing available strategy types."""
+        mock_get_registry.return_value = mock_strategy_registry
+        
+        response = client.get("/api/strategies/types")
+        
+        assert response.status_code == 200
+        data = response.json()
+        assert isinstance(data, list)
+        assert "RSIStrategy" in data
+

tests/unit/backend/api/test_trading.py

@@ -0,0 +1,293 @@
+"""Tests for trading API endpoints."""
+
+import pytest
+from decimal import Decimal
+from unittest.mock import Mock, patch, MagicMock
+from fastapi.testclient import TestClient
+from datetime import datetime
+
+from backend.main import app
+from backend.core.schemas import OrderCreate, OrderSide, OrderType
+from src.core.database import Order, OrderStatus
+
+
+@pytest.fixture
+def client():
+    """Test client fixture."""
+    return TestClient(app)
+
+
+@pytest.fixture
+def mock_trading_engine():
+    """Mock trading engine."""
+    engine = Mock()
+    engine.order_manager = Mock()
+    return engine
+
+
+@pytest.fixture
+def mock_order():
+    """Mock order object."""
+    order = Mock()
+    order.id = 1
+    order.exchange_id = 1
+    order.strategy_id = None
+    order.symbol = "BTC/USD"
+    order.order_type = OrderType.MARKET
+    order.side = OrderSide.BUY
+    order.status = OrderStatus.FILLED
+    order.quantity = Decimal("0.1")
+    order.price = Decimal("50000")
+    order.filled_quantity = Decimal("0.1")
+    order.average_fill_price = Decimal("50000")
+    order.fee = Decimal("5")
+    order.paper_trading = True
+    order.created_at = datetime.now()
+    order.updated_at = datetime.now()
+    order.filled_at = datetime.now()
+    return order
+
+
+class TestCreateOrder:
+    """Tests for POST /api/trading/orders."""
+    
+    @patch('backend.api.trading.get_trading_engine')
+    def test_create_order_success(self, mock_get_engine, client, mock_trading_engine, mock_order):
+        """Test successful order creation."""
+        mock_get_engine.return_value = mock_trading_engine
+        mock_trading_engine.execute_order.return_value = mock_order
+        
+        order_data = {
+            "exchange_id": 1,
+            "symbol": "BTC/USD",
+            "side": "buy",
+            "order_type": "market",
+            "quantity": "0.1",
+            "paper_trading": True
+        }
+        
+        response = client.post("/api/trading/orders", json=order_data)
+        
+        assert response.status_code == 200
+        data = response.json()
+        assert data["id"] == 1
+        assert data["symbol"] == "BTC/USD"
+        assert data["side"] == "buy"
+        mock_trading_engine.execute_order.assert_called_once()
+    
+    @patch('backend.api.trading.get_trading_engine')
+    def test_create_order_execution_failed(self, mock_get_engine, client, mock_trading_engine):
+        """Test order creation when execution fails."""
+        mock_get_engine.return_value = mock_trading_engine
+        mock_trading_engine.execute_order.return_value = None
+        
+        order_data = {
+            "exchange_id": 1,
+            "symbol": "BTC/USD",
+            "side": "buy",
+            "order_type": "market",
+            "quantity": "0.1",
+            "paper_trading": True
+        }
+        
+        response = client.post("/api/trading/orders", json=order_data)
+        
+        assert response.status_code == 400
+        assert "Order execution failed" in response.json()["detail"]
+    
+    @patch('backend.api.trading.get_trading_engine')
+    def test_create_order_invalid_data(self, client):
+        """Test order creation with invalid data."""
+        order_data = {
+            "exchange_id": "invalid",
+            "symbol": "BTC/USD",
+            "side": "buy",
+            "order_type": "market",
+            "quantity": "0.1"
+        }
+        
+        response = client.post("/api/trading/orders", json=order_data)
+        
+        assert response.status_code == 422  # Validation error
+
+
+class TestGetOrders:
+    """Tests for GET /api/trading/orders."""
+    
+    @patch('backend.api.trading.get_db')
+    def test_get_orders_success(self, mock_get_db, client, mock_database):
+        """Test getting orders."""
+        mock_db = Mock()
+        mock_session = Mock()
+        mock_db.get_session.return_value = mock_session
+        mock_get_db.return_value = mock_db
+        
+        # Create mock orders
+        mock_order1 = Mock(spec=Order)
+        mock_order1.id = 1
+        mock_order1.symbol = "BTC/USD"
+        mock_order1.paper_trading = True
+        
+        mock_order2 = Mock(spec=Order)
+        mock_order2.id = 2
+        mock_order2.symbol = "ETH/USD"
+        mock_order2.paper_trading = True
+        
+        mock_session.query.return_value.filter_by.return_value.order_by.return_value.limit.return_value.all.return_value = [mock_order1, mock_order2]
+        
+        response = client.get("/api/trading/orders?paper_trading=true&limit=10")
+        
+        assert response.status_code == 200
+        data = response.json()
+        assert isinstance(data, list)
+        assert len(data) == 2
+
+
+class TestGetOrder:
+    """Tests for GET /api/trading/orders/{order_id}."""
+    
+    @patch('backend.api.trading.get_db')
+    def test_get_order_success(self, mock_get_db, client, mock_database):
+        """Test getting order by ID."""
+        mock_db = Mock()
+        mock_session = Mock()
+        mock_db.get_session.return_value = mock_session
+        mock_get_db.return_value = mock_db
+        
+        mock_order = Mock(spec=Order)
+        mock_order.id = 1
+        mock_order.symbol = "BTC/USD"
+        
+        mock_session.query.return_value.filter_by.return_value.first.return_value = mock_order
+        
+        response = client.get("/api/trading/orders/1")
+        
+        assert response.status_code == 200
+        data = response.json()
+        assert data["id"] == 1
+    
+    @patch('backend.api.trading.get_db')
+    def test_get_order_not_found(self, mock_get_db, client):
+        """Test getting non-existent order."""
+        mock_db = Mock()
+        mock_session = Mock()
+        mock_db.get_session.return_value = mock_session
+        mock_get_db.return_value = mock_db
+        
+        mock_session.query.return_value.filter_by.return_value.first.return_value = None
+        
+        response = client.get("/api/trading/orders/999")
+        
+        assert response.status_code == 404
+        assert "Order not found" in response.json()["detail"]
+
+
+class TestCancelOrder:
+    """Tests for POST /api/trading/orders/{order_id}/cancel."""
+    
+    @patch('backend.api.trading.get_trading_engine')
+    @patch('backend.api.trading.get_db')
+    def test_cancel_order_success(self, mock_get_db, mock_get_engine, client, mock_trading_engine):
+        """Test successful order cancellation."""
+        mock_get_engine.return_value = mock_trading_engine
+        mock_trading_engine.order_manager.cancel_order.return_value = True
+        
+        mock_db = Mock()
+        mock_session = Mock()
+        mock_db.get_session.return_value = mock_session
+        mock_get_db.return_value = mock_db
+        
+        mock_order = Mock(spec=Order)
+        mock_order.id = 1
+        mock_order.status = OrderStatus.OPEN
+        mock_session.query.return_value.filter_by.return_value.first.return_value = mock_order
+        
+        response = client.post("/api/trading/orders/1/cancel")
+        
+        assert response.status_code == 200
+        data = response.json()
+        assert data["status"] == "cancelled"
+        assert data["order_id"] == 1
+    
+    @patch('backend.api.trading.get_db')
+    def test_cancel_order_not_found(self, mock_get_db, client):
+        """Test cancelling non-existent order."""
+        mock_db = Mock()
+        mock_session = Mock()
+        mock_db.get_session.return_value = mock_session
+        mock_get_db.return_value = mock_db
+        
+        mock_session.query.return_value.filter_by.return_value.first.return_value = None
+        
+        response = client.post("/api/trading/orders/999/cancel")
+        
+        assert response.status_code == 404
+        assert "Order not found" in response.json()["detail"]
+    
+    @patch('backend.api.trading.get_trading_engine')
+    @patch('backend.api.trading.get_db')
+    def test_cancel_order_already_filled(self, mock_get_db, mock_get_engine, client, mock_trading_engine):
+        """Test cancelling already filled order."""
+        mock_get_engine.return_value = mock_trading_engine
+        
+        mock_db = Mock()
+        mock_session = Mock()
+        mock_db.get_session.return_value = mock_session
+        mock_get_db.return_value = mock_db
+        
+        mock_order = Mock(spec=Order)
+        mock_order.id = 1
+        mock_order.status = OrderStatus.FILLED
+        mock_session.query.return_value.filter_by.return_value.first.return_value = mock_order
+        
+        response = client.post("/api/trading/orders/1/cancel")
+        
+        assert response.status_code == 400
+        assert "cannot be cancelled" in response.json()["detail"]
+
+
+class TestGetPositions:
+    """Tests for GET /api/trading/positions."""
+    
+    @patch('backend.api.trading.get_paper_trading')
+    def test_get_positions_paper_trading(self, mock_get_paper, client):
+        """Test getting positions for paper trading."""
+        mock_paper = Mock()
+        mock_position = Mock()
+        mock_position.symbol = "BTC/USD"
+        mock_position.quantity = Decimal("0.1")
+        mock_position.entry_price = Decimal("50000")
+        mock_position.current_price = Decimal("51000")
+        mock_position.unrealized_pnl = Decimal("100")
+        mock_position.realized_pnl = Decimal("0")
+        mock_paper.get_positions.return_value = [mock_position]
+        mock_get_paper.return_value = mock_paper
+        
+        response = client.get("/api/trading/positions?paper_trading=true")
+        
+        assert response.status_code == 200
+        data = response.json()
+        assert isinstance(data, list)
+        if len(data) > 0:
+            assert data[0]["symbol"] == "BTC/USD"
+
+
+class TestGetBalance:
+    """Tests for GET /api/trading/balance."""
+    
+    @patch('backend.api.trading.get_paper_trading')
+    def test_get_balance_paper_trading(self, mock_get_paper, client):
+        """Test getting balance for paper trading."""
+        mock_paper = Mock()
+        mock_paper.get_balance.return_value = Decimal("1000")
+        mock_paper.get_performance.return_value = {"total_return": 0.1}
+        mock_get_paper.return_value = mock_paper
+        
+        response = client.get("/api/trading/balance?paper_trading=true")
+        
+        assert response.status_code == 200
+        data = response.json()
+        assert "balance" in data
+        assert "performance" in data
+        assert data["balance"] == 1000.0
+

tests/unit/backend/core/test_dependencies.py

@@ -0,0 +1,77 @@
+"""Tests for backend dependencies."""
+
+import pytest
+from unittest.mock import patch, Mock
+from backend.core.dependencies import (
+    get_database, get_trading_engine, get_portfolio_tracker,
+    get_strategy_registry, get_backtesting_engine, get_exchange_factory
+)
+
+
+class TestGetDatabase:
+    """Tests for get_database dependency."""
+    
+    def test_get_database_singleton(self):
+        """Test that get_database returns same instance."""
+        db1 = get_database()
+        db2 = get_database()
+        # Should be cached/same instance due to lru_cache
+        assert db1 is db2
+
+
+class TestGetTradingEngine:
+    """Tests for get_trading_engine dependency."""
+    
+    @patch('backend.core.dependencies.get_trading_engine')
+    def test_get_trading_engine(self, mock_get_engine):
+        """Test getting trading engine."""
+        mock_engine = Mock()
+        mock_get_engine.return_value = mock_engine
+        engine = get_trading_engine()
+        assert engine is not None
+
+
+class TestGetPortfolioTracker:
+    """Tests for get_portfolio_tracker dependency."""
+    
+    @patch('backend.core.dependencies.get_portfolio_tracker')
+    def test_get_portfolio_tracker(self, mock_get_tracker):
+        """Test getting portfolio tracker."""
+        mock_tracker = Mock()
+        mock_get_tracker.return_value = mock_tracker
+        tracker = get_portfolio_tracker()
+        assert tracker is not None
+
+
+class TestGetStrategyRegistry:
+    """Tests for get_strategy_registry dependency."""
+    
+    @patch('backend.core.dependencies.get_strategy_registry')
+    def test_get_strategy_registry(self, mock_get_registry):
+        """Test getting strategy registry."""
+        mock_registry = Mock()
+        mock_get_registry.return_value = mock_registry
+        registry = get_strategy_registry()
+        assert registry is not None
+
+
+class TestGetBacktestingEngine:
+    """Tests for get_backtesting_engine dependency."""
+    
+    @patch('backend.core.dependencies.get_backtesting_engine')
+    def test_get_backtesting_engine(self, mock_get_engine):
+        """Test getting backtesting engine."""
+        mock_engine = Mock()
+        mock_get_engine.return_value = mock_engine
+        engine = get_backtesting_engine()
+        assert engine is not None
+
+
+class TestGetExchangeFactory:
+    """Tests for get_exchange_factory dependency."""
+    
+    def test_get_exchange_factory(self):
+        """Test getting exchange factory."""
+        factory = get_exchange_factory()
+        assert factory is not None
+

tests/unit/backend/core/test_schemas.py

@@ -0,0 +1,128 @@
+"""Tests for Pydantic schemas."""
+
+import pytest
+from decimal import Decimal
+from datetime import datetime
+from pydantic import ValidationError
+
+from backend.core.schemas import (
+    OrderCreate, OrderResponse, OrderSide, OrderType, OrderStatus,
+    PositionResponse, PortfolioResponse, PortfolioHistoryResponse
+)
+
+
+class TestOrderCreate:
+    """Tests for OrderCreate schema."""
+    
+    def test_order_create_valid(self):
+        """Test valid order creation."""
+        order = OrderCreate(
+            exchange_id=1,
+            symbol="BTC/USD",
+            side=OrderSide.BUY,
+            order_type=OrderType.MARKET,
+            quantity=Decimal("0.1"),
+            paper_trading=True
+        )
+        assert order.exchange_id == 1
+        assert order.symbol == "BTC/USD"
+        assert order.side == OrderSide.BUY
+    
+    def test_order_create_with_price(self):
+        """Test order creation with price."""
+        order = OrderCreate(
+            exchange_id=1,
+            symbol="BTC/USD",
+            side=OrderSide.BUY,
+            order_type=OrderType.LIMIT,
+            quantity=Decimal("0.1"),
+            price=Decimal("50000"),
+            paper_trading=True
+        )
+        assert order.price == Decimal("50000")
+    
+    def test_order_create_invalid_side(self):
+        """Test order creation with invalid side."""
+        with pytest.raises(ValidationError):
+            OrderCreate(
+                exchange_id=1,
+                symbol="BTC/USD",
+                side="invalid",
+                order_type=OrderType.MARKET,
+                quantity=Decimal("0.1")
+            )
+
+
+class TestOrderResponse:
+    """Tests for OrderResponse schema."""
+    
+    def test_order_response_from_dict(self):
+        """Test creating OrderResponse from dictionary."""
+        order_data = {
+            "id": 1,
+            "exchange_id": 1,
+            "strategy_id": None,
+            "symbol": "BTC/USD",
+            "order_type": OrderType.MARKET,
+            "side": OrderSide.BUY,
+            "status": OrderStatus.FILLED,
+            "quantity": Decimal("0.1"),
+            "price": Decimal("50000"),
+            "filled_quantity": Decimal("0.1"),
+            "average_fill_price": Decimal("50000"),
+            "fee": Decimal("5"),
+            "paper_trading": True,
+            "created_at": datetime.now(),
+            "updated_at": datetime.now(),
+            "filled_at": datetime.now()
+        }
+        
+        order = OrderResponse(**order_data)
+        assert order.id == 1
+        assert order.symbol == "BTC/USD"
+
+
+class TestPositionResponse:
+    """Tests for PositionResponse schema."""
+    
+    def test_position_response_valid(self):
+        """Test valid position response."""
+        position = PositionResponse(
+            symbol="BTC/USD",
+            quantity=Decimal("0.1"),
+            entry_price=Decimal("50000"),
+            current_price=Decimal("51000"),
+            unrealized_pnl=Decimal("100"),
+            realized_pnl=Decimal("0")
+        )
+        assert position.symbol == "BTC/USD"
+        assert position.unrealized_pnl == Decimal("100")
+
+
+class TestPortfolioResponse:
+    """Tests for PortfolioResponse schema."""
+    
+    def test_portfolio_response_valid(self):
+        """Test valid portfolio response."""
+        portfolio = PortfolioResponse(
+            positions=[],
+            performance={"total_return": 0.1},
+            timestamp="2025-01-01T00:00:00"
+        )
+        assert portfolio.positions == []
+        assert portfolio.performance["total_return"] == 0.1
+
+
+class TestPortfolioHistoryResponse:
+    """Tests for PortfolioHistoryResponse schema."""
+    
+    def test_portfolio_history_response_valid(self):
+        """Test valid portfolio history response."""
+        history = PortfolioHistoryResponse(
+            dates=["2025-01-01", "2025-01-02"],
+            values=[1000.0, 1100.0],
+            pnl=[0.0, 100.0]
+        )
+        assert len(history.dates) == 2
+        assert len(history.values) == 2
+