'Construct a test DriverManager
Test instances are passed a list of extensions to work from rather
than loading them from entry points.
:param extension: Pre-configured Extension instance
:type extension: :class:`~stevedore.extension.Extension`
:param namespace: The namespace for the manager; used only for
identification since the extensions are passed in.
:type namespace: str
:param propagate_map_exceptions: Boolean controlling whether exceptions
are propagated up through the map call or whether they are logged
and then ignored
:type propagate_map_exceptions: bool
:param on_load_failure_callback: Callback function that will
be called when a entrypoint can not be loaded. The
arguments that will be provided when this is called (when
an entrypoint fails to load) are (manager, entrypoint,
exception)
:type on_load_failure_callback: function
:param verify_requirements: Use setuptools to enforce the
dependencies of the plugin(s) being loaded. Defaults to False.
:type verify_requirements: bool
:return: The manager instance, initialized for testing'

@classmethod
def make_test_instance(cls, extension, namespace='TESTING', propagate_map_exceptions=False, on_load_failure_callback=None, verify_requirements=False):

    o = super(DriverManager, cls).make_test_instance([extension], namespace=namespace, propagate_map_exceptions=propagate_map_exceptions, on_load_failure_callback=on_load_failure_callback, verify_requirements=verify_requirements)
    return o
