Function test_restore_termios_settings

tests/test_cmd2.py:1076–1112

Test that terminal settings are restored after a command and that errors are suppressed.

(base_app, monkeypatch, is_tty, settings_set, raised_exception, should_call)

    ],
)
def test_restore_termios_settings(base_app, monkeypatch, is_tty, settings_set, raised_exception, should_call):
    """Test that terminal settings are restored after a command and that errors are suppressed."""
    import io
    import termios  # Mock termios since it's imported within the method

    termios_mock = mock.MagicMock()
    # The error attribute needs to be the actual exception for isinstance checks
    termios_mock.error = termios.error
    monkeypatch.setitem(sys.modules, "termios", termios_mock)

    # Set the exception to be raised by tcsetattr
    if raised_exception == "termios_error":
        termios_mock.tcsetattr.side_effect = termios.error("test termios error")
    elif raised_exception == "unsupported_operation":
        termios_mock.tcsetattr.side_effect = io.UnsupportedOperation("test io error")

    # Set initial termios settings so the logic will run
    if settings_set:
        termios_settings = ["dummy settings"]
        base_app._initial_termios_settings = termios_settings
    else:
        base_app._initial_termios_settings = None
        termios_settings = None  # for the assert

    # Mock stdin to make it look like a TTY
    monkeypatch.setattr(base_app.stdin, "isatty", lambda: is_tty)
    monkeypatch.setattr(base_app.stdin, "fileno", lambda: 0)

    # Run a command to trigger _run_cmdfinalization_hooks
    # This should not raise an exception
    base_app.onecmd_plus_hooks("help")

    # Verify that tcsetattr was called with the correct arguments
    if should_call:
        termios_mock.tcsetattr.assert_called_once_with(0, termios_mock.TCSANOW, termios_settings)
    else:
        termios_mock.tcsetattr.assert_not_called()


def test_sigint_handler(base_app) -> None: