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/monitor/tests/test_edge_cases_monitor.py

@@ -0,0 +1,216 @@
+"""Edge case and error handling tests for monitor service"""
+
+import sys
+import pytest
+import sys
+from unittest.mock import Mock, patch, MagicMock, mock_open
+from pathlib import Path
+import json
+
+# Create a proper psutil mock with Error exception class
+class PsutilError(Exception):
+    pass
+
+mock_psutil = MagicMock()
+mock_psutil.cpu_percent = Mock(return_value=45.5)
+mock_psutil.virtual_memory = Mock(return_value=MagicMock(percent=60.2))
+mock_psutil.Error = PsutilError
+sys.modules['psutil'] = mock_psutil
+
+import monitor
+
+
+@pytest.mark.unit
+def test_json_decode_error_handling():
+    """Test JSON decode error is handled correctly"""
+    with patch('monitor.logging') as mock_logging, \
+         patch('monitor.time.sleep', side_effect=[None, KeyboardInterrupt]), \
+         patch('monitor.Path') as mock_path, \
+         patch('builtins.open', mock_open(read_data='invalid json{')):
+        
+        # Mock blockchain file exists
+        blockchain_path = Mock()
+        blockchain_path.exists.return_value = True
+        marketplace_path = Mock()
+        marketplace_path.exists.return_value = False
+        
+        mock_path.side_effect = lambda x: blockchain_path if 'blockchain' in str(x) else marketplace_path
+        
+        logger = mock_logging.getLogger.return_value
+        mock_logging.basicConfig.return_value = None
+        
+        try:
+            monitor.main()
+        except KeyboardInterrupt:
+            pass
+        
+        # Verify error was logged
+        error_calls = [call for call in logger.error.call_args_list if 'JSONDecodeError' in str(call)]
+        assert len(error_calls) > 0
+
+
+@pytest.mark.unit
+def test_file_not_found_error_handling():
+    """Test FileNotFoundError is handled correctly"""
+    with patch('monitor.logging') as mock_logging, \
+         patch('monitor.time.sleep', side_effect=[None, KeyboardInterrupt]), \
+         patch('monitor.Path') as mock_path, \
+         patch('builtins.open', side_effect=FileNotFoundError("File not found")):
+        
+        # Mock blockchain file exists
+        blockchain_path = Mock()
+        blockchain_path.exists.return_value = True
+        marketplace_path = Mock()
+        marketplace_path.exists.return_value = False
+        
+        mock_path.side_effect = lambda x: blockchain_path if 'blockchain' in str(x) else marketplace_path
+        
+        logger = mock_logging.getLogger.return_value
+        mock_logging.basicConfig.return_value = None
+        
+        try:
+            monitor.main()
+        except KeyboardInterrupt:
+            pass
+        
+        # Verify error was logged
+        error_calls = [call for call in logger.error.call_args_list if 'FileNotFoundError' in str(call)]
+        assert len(error_calls) > 0
+
+
+@pytest.mark.unit
+def test_permission_error_handling():
+    """Test PermissionError is handled correctly"""
+    with patch('monitor.logging') as mock_logging, \
+         patch('monitor.time.sleep', side_effect=[None, KeyboardInterrupt]), \
+         patch('monitor.Path') as mock_path, \
+         patch('builtins.open', side_effect=PermissionError("Permission denied")):
+        
+        # Mock blockchain file exists
+        blockchain_path = Mock()
+        blockchain_path.exists.return_value = True
+        marketplace_path = Mock()
+        marketplace_path.exists.return_value = False
+        
+        mock_path.side_effect = lambda x: blockchain_path if 'blockchain' in str(x) else marketplace_path
+        
+        logger = mock_logging.getLogger.return_value
+        mock_logging.basicConfig.return_value = None
+        
+        try:
+            monitor.main()
+        except KeyboardInterrupt:
+            pass
+        
+        # Verify error was logged
+        error_calls = [call for call in logger.error.call_args_list if 'PermissionError' in str(call)]
+        assert len(error_calls) > 0
+
+
+@pytest.mark.unit
+def test_io_error_handling():
+    """Test IOError is handled correctly"""
+    with patch('monitor.logging') as mock_logging, \
+         patch('monitor.time.sleep', side_effect=[None, KeyboardInterrupt]), \
+         patch('monitor.Path') as mock_path, \
+         patch('builtins.open', side_effect=IOError("I/O error")):
+        
+        # Mock blockchain file exists
+        blockchain_path = Mock()
+        blockchain_path.exists.return_value = True
+        marketplace_path = Mock()
+        marketplace_path.exists.return_value = False
+        
+        mock_path.side_effect = lambda x: blockchain_path if 'blockchain' in str(x) else marketplace_path
+        
+        logger = mock_logging.getLogger.return_value
+        mock_logging.basicConfig.return_value = None
+        
+        try:
+            monitor.main()
+        except KeyboardInterrupt:
+            pass
+        
+        # Verify error was logged
+        error_calls = [call for call in logger.error.call_args_list if 'IOError' in str(call) or 'OSError' in str(call)]
+        assert len(error_calls) > 0
+
+
+@pytest.mark.unit
+def test_psutil_error_handling():
+    """Test psutil.Error is handled correctly"""
+    with patch('monitor.logging') as mock_logging, \
+         patch('monitor.time.sleep', side_effect=[None, KeyboardInterrupt]), \
+         patch('monitor.psutil.cpu_percent', side_effect=PsutilError("psutil error")):
+        
+        logger = mock_logging.getLogger.return_value
+        mock_logging.basicConfig.return_value = None
+        
+        try:
+            monitor.main()
+        except KeyboardInterrupt:
+            pass
+        
+        # Verify error was logged
+        error_calls = [call for call in logger.error.call_args_list if 'psutil error' in str(call)]
+        assert len(error_calls) > 0
+
+
+@pytest.mark.unit
+def test_empty_blocks_array():
+    """Test handling of empty blocks array in blockchain data"""
+    with patch('monitor.logging') as mock_logging, \
+         patch('monitor.time.sleep', side_effect=KeyboardInterrupt), \
+         patch('monitor.Path') as mock_path, \
+         patch('builtins.open', mock_open(read_data='{"blocks": []}')):
+        
+        # Mock blockchain file exists
+        blockchain_path = Mock()
+        blockchain_path.exists.return_value = True
+        marketplace_path = Mock()
+        marketplace_path.exists.return_value = False
+        
+        mock_path.side_effect = lambda x: blockchain_path if 'blockchain' in str(x) else marketplace_path
+        
+        logger = mock_logging.getLogger.return_value
+        mock_logging.basicConfig.return_value = None
+        
+        try:
+            monitor.main()
+        except KeyboardInterrupt:
+            pass
+        
+        # Verify blockchain stats were logged with 0 blocks
+        blockchain_calls = [call for call in logger.info.call_args_list if 'Blockchain' in str(call)]
+        assert len(blockchain_calls) > 0
+        assert '0 blocks' in str(blockchain_calls[0])
+
+
+@pytest.mark.unit
+def test_missing_blocks_key():
+    """Test handling of missing blocks key in blockchain data"""
+    with patch('monitor.logging') as mock_logging, \
+         patch('monitor.time.sleep', side_effect=KeyboardInterrupt), \
+         patch('monitor.Path') as mock_path, \
+         patch('builtins.open', mock_open(read_data='{"height": 100}')):
+        
+        # Mock blockchain file exists
+        blockchain_path = Mock()
+        blockchain_path.exists.return_value = True
+        marketplace_path = Mock()
+        marketplace_path.exists.return_value = False
+        
+        mock_path.side_effect = lambda x: blockchain_path if 'blockchain' in str(x) else marketplace_path
+        
+        logger = mock_logging.getLogger.return_value
+        mock_logging.basicConfig.return_value = None
+        
+        try:
+            monitor.main()
+        except KeyboardInterrupt:
+            pass
+        
+        # Verify blockchain stats were logged with 0 blocks (default)
+        blockchain_calls = [call for call in logger.info.call_args_list if 'Blockchain' in str(call)]
+        assert len(blockchain_calls) > 0
+        assert '0 blocks' in str(blockchain_calls[0])