tests: add more tests

tests/test_marcxml_parser.py

@@ -4,8 +4,11 @@ import xml.etree.ElementTree as ET
 
 import pytest
 
+from bibapi.schemas.marcxml import (
+    DataField,
+    SubField,
+)
 from bibapi.sru import (
-    NS,
     _smart_join_title,
     _text,
     controlfield_value,
@@ -15,20 +18,11 @@ from bibapi.sru import (
     first_subfield_value,
     first_subfield_value_from_fields,
     iter_datafields,
-    parse_echoed_request,
     parse_marc_record,
-    parse_record,
     parse_search_retrieve_response,
     subfield_values,
     subfield_values_from_fields,
 )
-from bibapi.schemas.marcxml import (
-    ControlField,
-    DataField,
-    MarcRecord,
-    SubField,
-)
-
 
 # --- Fixtures for sample XML data ---
 
@@ -490,4 +484,3 @@ class TestSmartJoinTitle:
     def test_join_strips_whitespace(self):
         result = _smart_join_title("  Main Title  ", "  Subtitle  ")
         assert result == "Main Title : Subtitle"
-