File Patch MCP Server

"""Manual test for MCP server functionality. This script demonstrates how to test the MCP server by calling all tools through the MCP protocol using the stdio client. NOTE: This is for manual/integration testing. The automated unit tests are in test_server.py. Usage: python tests/manual_test_server.py """ import asyncio import json import tempfile from pathlib import Path from mcp import ClientSession, StdioServerParameters from mcp.client.stdio import stdio_client async def test_server() -> None: """Test MCP server by calling all tools.""" print("Starting MCP Server Manual Test") print("=" * 60) # Configure server server_params = StdioServerParameters( command="python", args=["-m", "patch_mcp"], ) async with stdio_client(server_params) as (read, write): async with ClientSession(read, write) as session: # Initialize await session.initialize() print("\nServer initialized successfully") # Test 1: List tools print("\n1. LISTING TOOLS") print("-" * 60) tools = await session.list_tools() print(f"Available tools: {len(tools.tools)}") for tool in tools.tools: print(f" - {tool.name}: {tool.description}") # Test 2: inspect_patch (no file needed) print("\n2. TESTING inspect_patch") print("-" * 60) test_patch = """--- test.txt +++ test.txt @@ -1,3 +1,4 @@ line1 +line1.5 line2 line3 """ result = await session.call_tool("inspect_patch", arguments={"patch": test_patch}) data = json.loads(result.content[0].text) print(f"Success: {data['success']}") print(f"Files affected: {data['summary']['total_files']}") print(f"Lines added: {data['summary']['total_lines_added']}") print(f"Lines removed: {data['summary']['total_lines_removed']}") # Create temporary test files with tempfile.TemporaryDirectory() as tmpdir: tmp_path = Path(tmpdir) # Test 3: generate_patch print("\n3. TESTING generate_patch") print("-" * 60) original = tmp_path / "original.txt" modified = tmp_path / "modified.txt" original.write_text("line1\nline2\nline3\n") modified.write_text("line1\nline2_modified\nline3\n") result = await session.call_tool( "generate_patch", arguments={ "original_file": str(original), "modified_file": str(modified), }, ) data = json.loads(result.content[0].text) print(f"Success: {data['success']}") print(f"Lines added: {data['changes']['lines_added']}") print(f"Lines removed: {data['changes']['lines_removed']}") generated_patch = data["patch"] # Test 4: validate_patch print("\n4. TESTING validate_patch") print("-" * 60) result = await session.call_tool( "validate_patch", arguments={ "file_path": str(original), "patch": generated_patch, }, ) data = json.loads(result.content[0].text) print(f"Success: {data['success']}") print(f"Can apply: {data['can_apply']}") print(f"Preview lines to add: {data['preview']['lines_to_add']}") # Test 5: backup_file print("\n5. TESTING backup_file") print("-" * 60) test_file = tmp_path / "backup_test.txt" test_file.write_text("important content\n") result = await session.call_tool( "backup_file", arguments={"file_path": str(test_file)}, ) data = json.loads(result.content[0].text) print(f"Success: {data['success']}") print(f"Backup file: {Path(data['backup_file']).name}") print(f"Backup size: {data['backup_size']} bytes") backup_file = data["backup_file"] # Test 6: apply_patch (dry run) print("\n6. TESTING apply_patch (dry_run=True)") print("-" * 60) result = await session.call_tool( "apply_patch", arguments={ "file_path": str(original), "patch": generated_patch, "dry_run": True, }, ) data = json.loads(result.content[0].text) print(f"Success: {data['success']}") print(f"Applied (dry run): {data['applied']}") print(f"Message: {data['message']}") # Test 7: apply_patch (real) print("\n7. TESTING apply_patch (real)") print("-" * 60) result = await session.call_tool( "apply_patch", arguments={ "file_path": str(original), "patch": generated_patch, }, ) data = json.loads(result.content[0].text) print(f"Success: {data['success']}") print(f"Applied: {data['applied']}") print(f"Lines added: {data['changes']['lines_added']}") # Test 8: revert_patch print("\n8. TESTING revert_patch") print("-" * 60) result = await session.call_tool( "revert_patch", arguments={ "file_path": str(original), "patch": generated_patch, }, ) data = json.loads(result.content[0].text) print(f"Success: {data['success']}") print(f"Reverted: {data['reverted']}") print(f"Lines added (revert): {data['changes']['lines_added']}") # Test 9: restore_backup print("\n9. TESTING restore_backup") print("-" * 60) # Modify the file first test_file.write_text("modified content\n") result = await session.call_tool( "restore_backup", arguments={ "backup_file": backup_file, "force": True, }, ) data = json.loads(result.content[0].text) print(f"Success: {data['success']}") print(f"Restored to: {Path(data['restored_to']).name}") print(f"Restored size: {data['restored_size']} bytes") # Verify restoration restored_content = test_file.read_text() print(f"Content restored correctly: {restored_content == 'important content\n'}") print("\n" + "=" * 60) print("ALL TESTS COMPLETED SUCCESSFULLY") print("=" * 60) async def test_error_handling() -> None: """Test error handling in the server.""" print("\n\nTesting Error Handling") print("=" * 60) server_params = StdioServerParameters( command="python", args=["-m", "patch_mcp"], ) async with stdio_client(server_params) as (read, write): async with ClientSession(read, write) as session: await session.initialize() # Test 1: Unknown tool print("\n1. Testing unknown tool error") print("-" * 60) try: await session.call_tool("unknown_tool", arguments={}) print("ERROR: Should have raised an exception") except Exception as e: print(f"Correctly raised error: {type(e).__name__}") # Test 2: Invalid patch format print("\n2. Testing invalid patch error") print("-" * 60) result = await session.call_tool( "inspect_patch", arguments={"patch": "not a valid patch"}, ) data = json.loads(result.content[0].text) print(f"Success: {data['success']}") print(f"Error type: {data.get('error_type', 'N/A')}") # Test 3: File not found print("\n3. Testing file not found error") print("-" * 60) result = await session.call_tool( "validate_patch", arguments={ "file_path": "/nonexistent/file.txt", "patch": "--- file\n+++ file\n", }, ) data = json.loads(result.content[0].text) print(f"Success: {data['success']}") print(f"Error type: {data.get('error_type', 'N/A')}") print("\n" + "=" * 60) print("ERROR HANDLING TESTS COMPLETED") print("=" * 60) async def main() -> None: """Run all manual tests.""" try: await test_server() await test_error_handling() except Exception as e: print(f"\n\nFATAL ERROR: {e}") import traceback traceback.print_exc() if __name__ == "__main__": print(__doc__) asyncio.run(main())