def __init__(self, file=None, url=None):
"""
Initializes runner instance.
:param file: RST file with documentation.
:type file: str
:param url: URL against which requests are made.
:type url: str
"""
load_directives()
self.file = settings.file = file or settings.file
self.url = settings.url = url or settings.url
self.rendered = None