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/global-ai-agents/tests/test_unit_global_ai_agents.py

@@ -0,0 +1,158 @@
+"""Unit tests for global AI agents service"""
+
+import pytest
+import sys
+import sys
+from pathlib import Path
+from datetime import datetime
+
+
+from main import app, Agent, AgentMessage, CollaborationSession, AgentPerformance
+
+
+@pytest.mark.unit
+def test_app_initialization():
+    """Test that the FastAPI app initializes correctly"""
+    assert app is not None
+    assert app.title == "AITBC Global AI Agent Communication Service"
+    assert app.version == "1.0.0"
+
+
+@pytest.mark.unit
+def test_agent_model():
+    """Test Agent model"""
+    agent = Agent(
+        agent_id="agent_123",
+        name="Test Agent",
+        type="ai",
+        region="us-east-1",
+        capabilities=["trading", "analysis"],
+        status="active",
+        languages=["english", "chinese"],
+        specialization="trading",
+        performance_score=4.5
+    )
+    assert agent.agent_id == "agent_123"
+    assert agent.name == "Test Agent"
+    assert agent.type == "ai"
+    assert agent.status == "active"
+    assert agent.performance_score == 4.5
+
+
+@pytest.mark.unit
+def test_agent_empty_capabilities():
+    """Test Agent with empty capabilities"""
+    agent = Agent(
+        agent_id="agent_123",
+        name="Test Agent",
+        type="ai",
+        region="us-east-1",
+        capabilities=[],
+        status="active",
+        languages=["english"],
+        specialization="general",
+        performance_score=4.5
+    )
+    assert agent.capabilities == []
+
+
+@pytest.mark.unit
+def test_agent_message_model():
+    """Test AgentMessage model"""
+    message = AgentMessage(
+        message_id="msg_123",
+        sender_id="agent_123",
+        recipient_id="agent_456",
+        message_type="request",
+        content={"data": "test"},
+        priority="high",
+        language="english",
+        timestamp=datetime.utcnow()
+    )
+    assert message.message_id == "msg_123"
+    assert message.sender_id == "agent_123"
+    assert message.recipient_id == "agent_456"
+    assert message.message_type == "request"
+    assert message.priority == "high"
+
+
+@pytest.mark.unit
+def test_agent_message_broadcast():
+    """Test AgentMessage with None recipient (broadcast)"""
+    message = AgentMessage(
+        message_id="msg_123",
+        sender_id="agent_123",
+        recipient_id=None,
+        message_type="broadcast",
+        content={"data": "test"},
+        priority="medium",
+        language="english",
+        timestamp=datetime.utcnow()
+    )
+    assert message.recipient_id is None
+
+
+@pytest.mark.unit
+def test_collaboration_session_model():
+    """Test CollaborationSession model"""
+    session = CollaborationSession(
+        session_id="session_123",
+        participants=["agent_123", "agent_456"],
+        session_type="task_force",
+        objective="Complete trading task",
+        created_at=datetime.utcnow(),
+        expires_at=datetime.utcnow(),
+        status="active"
+    )
+    assert session.session_id == "session_123"
+    assert session.participants == ["agent_123", "agent_456"]
+    assert session.session_type == "task_force"
+
+
+@pytest.mark.unit
+def test_collaboration_session_empty_participants():
+    """Test CollaborationSession with empty participants"""
+    session = CollaborationSession(
+        session_id="session_123",
+        participants=[],
+        session_type="research",
+        objective="Research task",
+        created_at=datetime.utcnow(),
+        expires_at=datetime.utcnow(),
+        status="active"
+    )
+    assert session.participants == []
+
+
+@pytest.mark.unit
+def test_agent_performance_model():
+    """Test AgentPerformance model"""
+    performance = AgentPerformance(
+        agent_id="agent_123",
+        timestamp=datetime.utcnow(),
+        tasks_completed=10,
+        response_time_ms=50.5,
+        accuracy_score=0.95,
+        collaboration_score=0.9,
+        resource_usage={"cpu": 50.0, "memory": 60.0}
+    )
+    assert performance.agent_id == "agent_123"
+    assert performance.tasks_completed == 10
+    assert performance.response_time_ms == 50.5
+    assert performance.accuracy_score == 0.95
+
+
+@pytest.mark.unit
+def test_agent_performance_negative_values():
+    """Test AgentPerformance with negative values"""
+    performance = AgentPerformance(
+        agent_id="agent_123",
+        timestamp=datetime.utcnow(),
+        tasks_completed=-10,
+        response_time_ms=-50.5,
+        accuracy_score=-0.95,
+        collaboration_score=-0.9,
+        resource_usage={}
+    )
+    assert performance.tasks_completed == -10
+    assert performance.response_time_ms == -50.5