Plugin API

Balder provides a separate class that helps to implement your own plugin.

The BalderPlugin

The main object to get access to the deep functionality of Balder is the BalderPlugin class. You can overwrite it in every balderglob.py file.

class balder.BalderPlugin(session: BalderSession)

This is the balder plugin class. You can create your own plugin, by creating a subclass of it. With that you are able to overwrite the methods you want to use in your plugin.

addoption(argument_parser: argparse.ArgumentParser)

The callback will be executed while the ArgumentParser is being created.

Parameters

argument_parser – the argument parser object

filter_executor_tree(executor_tree: ExecutorTree) → None

This callback will be executed before the ExecutorTree runs. It contains the current representation of the ExecutorTree, that will be executed in the next step. With this callback it is possible to manipulate the ExecutorTree. You have not to return something, the given executor_tree is a reference.

Parameters

executor_tree – the reference to the main ExecutorTree object balder uses for this session

modify_collected_classes(scenarios: List[Type[Scenario]], setups: List[Type[Setup]]) → Tuple[List[Type[Scenario]], List[Type[Setup]]]

This callback will be executed after the Collector has collected the Scenario classes and the Setup classes.

Parameters

• scenarios – all collected Scenario classes that are currently in the collected list

• setups – all collected Setup classes that are currently in the collected list

Returns

a tuple of lists, where the first list is the new list with all Scenario classes, the second element is a list with all Setup classes

modify_collected_pyfiles(pyfiles: List[pathlib.Path]) → List[pathlib.Path]

This callback will be executed after the Collector has collected all python files that are inside the current working directory.

Note

Note that these files are not filtered yet. The list will contain every existing python file.

Parameters

pyfiles – a list with all python filepaths

Returns

the new list of all filepaths

session_finished(executor_tree: Union[ExecutorTree, None])

This callback will be executed at the end of every session. The callback will run in a collect-only and resolve-only session too. Note, that the executor_tree argument is None in a collect-only session.

Parameters

executor_tree – the reference to the main ExecutorTree object that balder uses for this session