Ejemplos de PythonLaunchDescriptionSource.get_launch_description en Python

Ejemplo n.º 1

def test_python_launch_description_source():
    """Test the PythonLaunchDescriptionSource class."""
    this_dir = os.path.dirname(os.path.abspath(__file__))
    simple_launch_file_path = os.path.join(this_dir, 'simple.launch.py')
    plds = PythonLaunchDescriptionSource(simple_launch_file_path)
    assert 'python launch file' in plds.method
    assert 'launch.substitutions.text_substitution.TextSubstitution' in plds.location
    ld = plds.get_launch_description(LaunchContext())
    assert plds.location == simple_launch_file_path
    assert 0 == len(ld.entities)

    with pytest.raises(InvalidPythonLaunchFileError):
        plds = PythonLaunchDescriptionSource(
            os.path.join(this_dir, 'loadable_python_module.py'))
        ld = plds.get_launch_description(LaunchContext())

    with pytest.raises(FileNotFoundError):
        plds = PythonLaunchDescriptionSource('does_not_exist')
        ld = plds.get_launch_description(LaunchContext())