def test_no_function_no_matching_child(self):
child = {'command': 'child', 'function': dummy}
node = {'command': 'test', 'children': [child]}
menu_node = MenuNode(**node)
with pytest.raises(InvalidArgError):
menu_node.process_arg('prompt')
def test_calls_child_function(self):
child = {'command': 'child', 'function': lambda: 42}
node = {'command': 'test', 'children': [child]}
menu_node = MenuNode(**node)
assert menu_node.process_arg('child') == 42
def test_calls_function(self):
node = {'command': 'test', 'function': lambda: 42}
menu_node = MenuNode(**node)
assert menu_node.process_arg('') == 42