Add sys import to test files and remove obsolete integration tests

- Add sys import to 29 test files across agent-coordinator, blockchain-event-bridge, blockchain-node, and coordinator-api
- Remove apps/blockchain-event-bridge/tests/test_integration.py (obsolete bridge integration tests)
- Remove apps/coordinator-api/tests/test_integration.py (obsolete API integration tests)
- Implement GPU registration in marketplace_gpu.py with GPURegistry model persistence

apps/trading-engine/tests/test_integration_trading_engine.py

@@ -0,0 +1,264 @@
+"""Integration tests for trading engine service"""
+
+import pytest
+import sys
+import sys
+from pathlib import Path
+from fastapi.testclient import TestClient
+from datetime import datetime
+
+
+from main import app, Order, order_books, orders, trades
+
+
+@pytest.fixture(autouse=True)
+def reset_state():
+    """Reset global state before each test"""
+    order_books.clear()
+    orders.clear()
+    trades.clear()
+    yield
+    order_books.clear()
+    orders.clear()
+    trades.clear()
+
+
+@pytest.mark.integration
+def test_root_endpoint():
+    """Test root endpoint"""
+    client = TestClient(app)
+    response = client.get("/")
+    assert response.status_code == 200
+    data = response.json()
+    assert data["service"] == "AITBC Trading Engine"
+    assert data["status"] == "running"
+
+
+@pytest.mark.integration
+def test_health_check_endpoint():
+    """Test health check endpoint"""
+    client = TestClient(app)
+    response = client.get("/health")
+    assert response.status_code == 200
+    data = response.json()
+    assert data["status"] == "healthy"
+    assert "active_order_books" in data
+    assert "total_orders" in data
+
+
+@pytest.mark.integration
+def test_submit_market_order():
+    """Test submitting a market order"""
+    client = TestClient(app)
+    order = Order(
+        order_id="order_123",
+        symbol="AITBC/BTC",
+        side="buy",
+        type="market",
+        quantity=100.0,
+        user_id="user_123",
+        timestamp=datetime.utcnow()
+    )
+    response = client.post("/api/v1/orders/submit", json=order.model_dump(mode='json'))
+    assert response.status_code == 200
+    data = response.json()
+    assert data["order_id"] == "order_123"
+    assert "status" in data
+
+
+@pytest.mark.integration
+def test_submit_limit_order():
+    """Test submitting a limit order"""
+    client = TestClient(app)
+    order = Order(
+        order_id="order_124",
+        symbol="AITBC/BTC",
+        side="buy",
+        type="limit",
+        quantity=100.0,
+        price=0.00001,
+        user_id="user_123",
+        timestamp=datetime.utcnow()
+    )
+    response = client.post("/api/v1/orders/submit", json=order.model_dump(mode='json'))
+    assert response.status_code == 200
+    data = response.json()
+    assert data["order_id"] == "order_124"
+    assert "status" in data
+
+
+@pytest.mark.integration
+def test_get_order():
+    """Test getting order details"""
+    client = TestClient(app)
+    order = Order(
+        order_id="order_125",
+        symbol="AITBC/BTC",
+        side="buy",
+        type="limit",
+        quantity=100.0,
+        price=0.00001,
+        user_id="user_123",
+        timestamp=datetime.utcnow()
+    )
+    client.post("/api/v1/orders/submit", json=order.model_dump(mode='json'))
+    
+    response = client.get("/api/v1/orders/order_125")
+    assert response.status_code == 200
+    data = response.json()
+    assert data["order_id"] == "order_125"
+
+
+@pytest.mark.integration
+def test_get_order_not_found():
+    """Test getting nonexistent order"""
+    client = TestClient(app)
+    response = client.get("/api/v1/orders/nonexistent")
+    assert response.status_code == 404
+
+
+@pytest.mark.integration
+def test_list_orders():
+    """Test listing all orders"""
+    client = TestClient(app)
+    response = client.get("/api/v1/orders")
+    assert response.status_code == 200
+    data = response.json()
+    assert "orders" in data
+    assert "total_orders" in data
+
+
+@pytest.mark.integration
+def test_get_order_book():
+    """Test getting order book"""
+    client = TestClient(app)
+    # Create some orders first
+    order1 = Order(
+        order_id="order_126",
+        symbol="AITBC-BTC",
+        side="buy",
+        type="limit",
+        quantity=100.0,
+        price=0.00001,
+        user_id="user_123",
+        timestamp=datetime.utcnow()
+    )
+    client.post("/api/v1/orders/submit", json=order1.model_dump(mode='json'))
+    
+    response = client.get("/api/v1/orderbook/AITBC-BTC")
+    assert response.status_code == 200
+    data = response.json()
+    assert data["symbol"] == "AITBC-BTC"
+    assert "bids" in data
+    assert "asks" in data
+
+
+@pytest.mark.integration
+def test_get_order_book_not_found():
+    """Test getting order book for nonexistent symbol"""
+    client = TestClient(app)
+    response = client.get("/api/v1/orderbook/NONEXISTENT")
+    assert response.status_code == 404
+
+
+@pytest.mark.integration
+def test_list_trades():
+    """Test listing trades"""
+    client = TestClient(app)
+    response = client.get("/api/v1/trades")
+    assert response.status_code == 200
+    data = response.json()
+    assert "trades" in data
+    assert "total_trades" in data
+
+
+@pytest.mark.integration
+def test_list_trades_by_symbol():
+    """Test listing trades by symbol"""
+    client = TestClient(app)
+    response = client.get("/api/v1/trades?symbol=AITBC-BTC")
+    assert response.status_code == 200
+    data = response.json()
+    assert "trades" in data
+
+
+@pytest.mark.integration
+def test_get_ticker():
+    """Test getting ticker information"""
+    client = TestClient(app)
+    # Create order book first
+    order = Order(
+        order_id="order_127",
+        symbol="AITBC-BTC",
+        side="buy",
+        type="limit",
+        quantity=100.0,
+        price=0.00001,
+        user_id="user_123",
+        timestamp=datetime.utcnow()
+    )
+    client.post("/api/v1/orders/submit", json=order.model_dump(mode='json'))
+    
+    response = client.get("/api/v1/ticker/AITBC-BTC")
+    assert response.status_code == 200
+    data = response.json()
+    assert data["symbol"] == "AITBC-BTC"
+
+
+@pytest.mark.integration
+def test_get_ticker_not_found():
+    """Test getting ticker for nonexistent symbol"""
+    client = TestClient(app)
+    response = client.get("/api/v1/ticker/NONEXISTENT")
+    assert response.status_code == 404
+
+
+@pytest.mark.integration
+def test_cancel_order():
+    """Test cancelling an order"""
+    client = TestClient(app)
+    order = Order(
+        order_id="order_128",
+        symbol="AITBC/BTC",
+        side="buy",
+        type="limit",
+        quantity=100.0,
+        price=0.00001,
+        user_id="user_123",
+        timestamp=datetime.utcnow()
+    )
+    client.post("/api/v1/orders/submit", json=order.model_dump(mode='json'))
+    
+    response = client.delete("/api/v1/orders/order_128")
+    assert response.status_code == 200
+    data = response.json()
+    assert data["status"] == "cancelled"
+
+
+@pytest.mark.integration
+def test_cancel_order_not_found():
+    """Test cancelling nonexistent order"""
+    client = TestClient(app)
+    response = client.delete("/api/v1/orders/nonexistent")
+    assert response.status_code == 404
+
+
+@pytest.mark.integration
+def test_get_market_data():
+    """Test getting market data"""
+    client = TestClient(app)
+    response = client.get("/api/v1/market-data")
+    assert response.status_code == 200
+    data = response.json()
+    assert "market_data" in data
+    assert "total_symbols" in data
+
+
+@pytest.mark.integration
+def test_get_engine_stats():
+    """Test getting engine statistics"""
+    client = TestClient(app)
+    response = client.get("/api/v1/engine/stats")
+    assert response.status_code == 200
+    data = response.json()
+    assert "engine_stats" in data