feat(drive): add create_drive_folder tool and unit test

Co-authored-by: Cursor <cursoragent@cursor.com>

tests/gdrive/test_drive_tools.py

@@ -0,0 +1,42 @@
+"""
+Unit tests for Google Drive MCP tools.
+
+Tests create_drive_folder with mocked API responses.
+"""
+
+import pytest
+from unittest.mock import Mock, AsyncMock, patch
+import sys
+import os
+
+sys.path.insert(0, os.path.abspath(os.path.join(os.path.dirname(__file__), "../..")))
+
+
+@pytest.mark.asyncio
+async def test_create_drive_folder():
+    """Test create_drive_folder returns success message with folder id, name, and link."""
+    from gdrive.drive_tools import _create_drive_folder_impl
+
+    mock_service = Mock()
+    mock_response = {
+        "id": "folder123",
+        "name": "My Folder",
+        "webViewLink": "https://drive.google.com/drive/folders/folder123",
+    }
+    mock_request = Mock()
+    mock_request.execute.return_value = mock_response
+    mock_service.files.return_value.create.return_value = mock_request
+
+    with patch("gdrive.drive_tools.resolve_folder_id", new_callable=AsyncMock, return_value="root"):
+        result = await _create_drive_folder_impl(
+            service=mock_service,
+            user_google_email="user@example.com",
+            folder_name="My Folder",
+            parent_folder_id="root",
+        )
+
+    assert "Successfully created folder" in result
+    assert "My Folder" in result
+    assert "folder123" in result
+    assert "user@example.com" in result
+    assert "https://drive.google.com/drive/folders/folder123" in result