Merged in bugfix/uom (pull request #661)

Bugfix/uom

* Add "Per Procedure" to valid unit of measure list

* Enhance unit of measure prompt for clarity and specificity in reimbursement methodologies

* Refine unit of measure prompt to ensure defaulting to 'Per Unit' regardless of procedure codes for flat rate methodologies

* Merge remote-tracking branch 'origin/main' into bugfix/uom

* Merged main into bugfix/uom

* Enhance logic for setting UNIT_OF_MEASURE to 'Per Unit' for Flat Rate reimbursement, handling all edge cases including NaN and empty strings.

* Enhance is_empty function to handle additional empty value cases for pd.Series and strings

* Enhance test cases for is_empty function to cover additional whitespace and null-like values

* Merge branch 'bugfix/uom' of https://bitbucket.org/aarete/doczy.ai into bugfix/uom

* Enhance type checking for is_empty function with overloads for str, list, and pd.Series

* Overload fix

* Merged main into bugfix/uom


Approved-by: Katon Minhas

fieldExtraction/tests/test_string_utils.py

@@ -5,11 +5,15 @@ import pytest
 import src.utils as utils
 import src.utils.llm_utils as llm_utils
 from constants.delimiters import Delimiter
-from src.utils.string_utils import (contains_reimbursement,
-                                    count_reimbursements_in_exhibit,
-                                    extract_signature_page,
-                                    extract_text_from_delimiters, is_empty,
-                                    json_parsing_search, page_key_sort)
+from src.utils.string_utils import (
+    contains_reimbursement,
+    count_reimbursements_in_exhibit,
+    extract_signature_page,
+    extract_text_from_delimiters,
+    is_empty,
+    json_parsing_search,
+    page_key_sort,
+)
 
 
 class TestStringUtils:
@@ -168,6 +172,17 @@ class TestStringUtils:
             (pd.NA, True),
             ("This is not empty.", False),
             (42, False),
+            ("   ", True),  # Whitespace-only string
+            ("\t", True),  # Tab character
+            ("\n", True),  # Newline character
+            ("n/a", True),  # Lowercase N/A
+            ("na", True),  # Lowercase NA
+            ("NULL", True),  # Uppercase NULL
+            ("NONE", True),  # Uppercase NONE
+            ("None", True),  # Mixed case None (already in empty_values)
+            ("UNKNOWN", False),  # Should NOT be empty
+            ("unknown", False),  # Should NOT be empty
+            ("  N/A  ", True),  # N/A with whitespace
         ],
     )
     def test_is_empty(self, value, expected):