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:
     """

tests/test_functions.py

@@ -1,13 +1,45 @@
 from unittest import IsolatedAsyncioTestCase
+from unittest.mock import patch, MagicMock, AsyncMock, call
+
+from bs4 import BeautifulSoup
+
+from mwfin import functions
 
 
 class FunctionsTestCase(IsolatedAsyncioTestCase):
 
-    def test_soup_from_url(self):
-        pass
+    @patch.object(functions, 'ClientSession')
+    async def test_soup_from_url(self, mock_session_cls):
+        test_html = '<b>foo</b>'
+        mock_response = MagicMock()
+        mock_response.text = AsyncMock(return_value=test_html)
+        mock_get_return = MagicMock()
+        mock_get_return.__aenter__ = AsyncMock(return_value=mock_response)
+        mock_session_obj = MagicMock()
+        mock_session_obj.get = MagicMock(return_value=mock_get_return)
+        mock_session_cls.return_value = mock_session_obj
+
+        expected_output = BeautifulSoup(test_html, 'html.parser')
+        output = await functions.soup_from_url('baz')
+        self.assertEqual(expected_output, output)
+        output = await functions.soup_from_url('baz', mock_session_obj)
+        self.assertEqual(expected_output, output)
 
     def test_extract_end_dates(self):
-        pass
+        test_html = '<tr>' \
+                    '<th><div> ITEM </div></th>' \
+                    '<th><div> 30-SEP-2020 </div></th>' \
+                    '<th><div> 31-DEC-2020 </div></th>' \
+                    '<th><div> 31-MAR-2021 </div></th>' \
+                    '<th><div> 30-JUN-2021 </div></th>' \
+                    '<th><div> 30-SEP-2021 </div></th>' \
+                    '</tr>'
+        test_soup = BeautifulSoup(test_html, 'html.parser')
+
+        expected_output = ('30-SEP-2020', '31-DEC-2020', '31-MAR-2021',
+                           '30-JUN-2021', '30-SEP-2021')
+        output = functions.extract_end_dates(test_soup)
+        self.assertTupleEqual(expected_output, output)
 
     def test_find_relevant_table_rows(self):
         pass