first two unit tests

src/mwfin/functions.py

@@ -11,6 +11,9 @@ from bs4.element import ResultSet, Tag
 # the end dates of the reporting periods as strings (either years or quarters).
 ResultDict = dict[str, Union[tuple[int], tuple[str]]]
 
+DOMAIN = 'www.marketwatch.com'
+HTML_PARSER = 'html.parser'
+
 
 async def soup_from_url(url: str, session: ClientSession = None) -> BeautifulSoup:
     """