reading test html file in test class set up method

src/mwfin/functions.py

@@ -11,6 +11,8 @@ 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]]]
 
+HTML_PARSER = 'html.parser'
+
 
 async def soup_from_url(url: str, session: ClientSession = None) -> BeautifulSoup:
     """

tests/test_functions.py

@@ -1,3 +1,4 @@
+from pathlib import Path
 from unittest import IsolatedAsyncioTestCase
 from unittest.mock import patch, MagicMock, AsyncMock, call
 
@@ -5,14 +6,21 @@ from bs4 import BeautifulSoup
 
 from mwfin import functions
 
-# boiled down & accurate structure of a relevant data table
-# https://www.marketwatch.com/investing/stock/aapl/financials/cash-flow
-# view page source @ line 2055
-TEST_HTML = ''
-TEST_SOUP = BeautifulSoup(TEST_HTML, 'html.parser')
+
+THIS_DIR = Path(__file__).parent
 
 
 class FunctionsTestCase(IsolatedAsyncioTestCase):
+    # boiled down & accurate structure of a relevant data table
+    # https://www.marketwatch.com/investing/stock/aapl/financials/cash-flow
+    # view page source @ line 2055
+    TEST_HTML_FILE_PATH = Path(THIS_DIR, 'test_structure.html')
+
+    @classmethod
+    def setUpClass(cls) -> None:
+        with open(cls.TEST_HTML_FILE_PATH, 'r') as f:
+            test_html = f.read()
+        cls.test_soup = BeautifulSoup(test_html, functions.HTML_PARSER)
 
     @patch.object(functions, 'ClientSession')
     async def test_soup_from_url(self, mock_session_cls):
@@ -33,7 +41,7 @@ class FunctionsTestCase(IsolatedAsyncioTestCase):
 
     def test_extract_end_dates(self):
         expected_output = ('End_Date_1', 'End_Date_2')
-        output = functions.extract_end_dates(TEST_SOUP)
+        output = functions.extract_end_dates(self.test_soup)
         self.assertTupleEqual(expected_output, output)
 
     def test_find_relevant_table_rows(self):