from unittest.mock import patch from src import single_mock # Replaces "aws_lambda_powertools.utilities.parameters.get_parameter" with a Mock object @patch("aws_lambda_powertools.utilities.parameters.get_parameter") def test_handler(get_parameter_mock): get_parameter_mock.return_value = "mock_value" return_val = single_mock.handler({}, {}) get_parameter_mock.assert_called_with("my-parameter-name") assert return_val.get("message") == "mock_value"