Correct mypy issue

A function was marked as returning `Optional`, and it didn't need to be.

Also added tests for that function, because I thought I would have to change the
actual function.

Author: BryceStevenWilley

docassemble/ALWeaver/list_taxonomy.py

@@ -51,7 +51,7 @@ def get_order(prefix: str) -> int:
     )
 
     # Define a function to create the desired dictionary for each row
-    def create_dict(row: pd.Series) -> Optional[Dict[str, str]]:
+    def create_dict(row: pd.Series) -> Dict[str, str]:
         # row["Suffix"] != "-00-00-00-00":
         return {
             "label": row["Title"],

docassemble/ALWeaver/test_map_names.py

@@ -1,10 +1,12 @@
 # do not pre-load
 import unittest
+import pathlib
 
 from .interview_generator import map_raw_to_final_display, DAField
+from .list_taxonomy import get_LIST_codes
 from docassemble.base.util import log
 
-__all__ = ["TestMapNames"]
+__all__ = ["TestMapNames", "TestListTaxonomy"]
 
 # Some basic test input pdf label strings (left) with desired results (right)
 attachment_scenarios = {
@@ -232,5 +234,19 @@ def run_scenarios(self, scenarios, function):
         return passed, errored
 
 
+taxonomy_file = pathlib.Path(__file__).parent / "data" / "sources" / "list-taxonomy.csv"
+
+
+class TestListTaxonomy(unittest.TestCase):
+    def setUp(self):
+        pass
+
+    def test_taxonomy(self):
+        codes = get_LIST_codes(taxonomy_file)
+        self.assertEqual(len(codes), 224)
+        self.assertEqual(len(set(c["group"] for c in codes)), 20)
+        self.assertEqual(len(set(c["label"] for c in codes)), 224)
+
+
 if __name__ == "__main__":
     unittest.main()