import subprocess from unittest.mock import patch, MagicMock from gita import info @patch('subprocess.run') def test_run_quiet_diff(mock_run): mock_return = MagicMock() mock_run.return_value = mock_return got = info.run_quiet_diff(['--flags'], ['my', 'args']) mock_run.assert_called_once_with( ['git', '--flags', 'diff', '--quiet', 'my', 'args'], stderr=subprocess.DEVNULL, ) assert got == mock_return.returncode