Fixed issues 191 195

tests/test_client.py

@@ -0,0 +1,76 @@
+import pytest
+import asyncio
+from unittest.mock import AsyncMock, patch
+from agentic_security.mcp import ClientSession
+from ..agentic_security.mcp.client import run
+
+# Fixtures 
+@pytest.fixture(scope="session")
+def event_loop():
+    """Create an instance of the default event loop for each test case."""
+    loop = asyncio.get_event_loop_policy().new_event_loop()
+    yield loop
+    loop.close()
+
+@pytest.fixture
+async def mock_session():
+    with patch('mcp.client.stdio.stdio_client') as mock_client:
+       
+        mock_read = AsyncMock()
+        mock_write = AsyncMock()
+        
+        # Configures mock client such that mock responses are returned 
+        mock_client.return_value.__aenter__.return_value = (mock_read, mock_write)
+        
+        # Creates a mock session
+        mock_session = AsyncMock(spec=ClientSession)
+        
+        # Expected responses
+        mock_session.initialize = AsyncMock()
+        mock_session.list_prompts = AsyncMock(return_value=["test_prompt"])
+        mock_session.list_resources = AsyncMock(return_value=["test_resource"])
+        mock_session.list_tools = AsyncMock(return_value=["echo_tool"])
+        mock_session.call_tool = AsyncMock(return_value="Hello from client!")
+        
+        with patch('mcp.ClientSession', return_value=mock_session):
+            yield mock_session
+
+# Tests 
+
+@pytest.mark.asyncio
+async def test_initialization(mock_session):
+    """Test initialization success and failure cases"""
+    # Test initialization success case  
+    await run()
+    mock_session.initialize.assert_called_once()
+    
+    # Resetting the mock to test for failure case 
+    mock_session.initialize.reset_mock()
+    mock_session.initialize.side_effect = ConnectionError("Failed to connect")
+    
+    # Test connection error
+    with pytest.raises(ConnectionError):
+        await run()
+
+@pytest.mark.asyncio
+async def test_list_resources(mock_session):
+    """Test listing available resources"""
+    await run()
+    mock_session.list_resources.assert_called_once()
+    assert await mock_session.list_resources() == ["test_resource"]
+
+@pytest.mark.asyncio
+async def test_list_tools(mock_session):
+    """Test listing available tools"""
+    await run()
+    mock_session.list_tools.assert_called_once()
+    assert await mock_session.list_tools() == ["echo_tool"]
+
+@pytest.mark.asyncio
+async def test_echo_tool(mock_session):
+    """Test the echo tool functionality"""
+    await run()
+    mock_session.call_tool.assert_called_once_with(
+        "echo_tool", 
+        arguments={"message": "Hello from client!"}
+    )