Adjust tests in xml folder for new string option (#56198)

Author: phofl

pandas/tests/io/xml/test_xml.py

@@ -32,6 +32,7 @@
     ArrowStringArray,
     StringArray,
 )
+from pandas.core.arrays.string_arrow import ArrowStringArrayNumpySemantics
 
 from pandas.io.common import get_handle
 from pandas.io.xml import read_xml
@@ -2004,7 +2005,9 @@ def test_s3_parser_consistency(s3_public_bucket_with_data, s3so):
     tm.assert_frame_equal(df_lxml, df_etree)
 
 
-def test_read_xml_nullable_dtypes(parser, string_storage, dtype_backend):
+def test_read_xml_nullable_dtypes(
+    parser, string_storage, dtype_backend, using_infer_string
+):
     # GH#50500
     data = """<?xml version='1.0' encoding='utf-8'?>
 <data xmlns="http://example.com">
@@ -2032,7 +2035,12 @@ def test_read_xml_nullable_dtypes(parser, string_storage, dtype_backend):
 </row>
 </data>"""
 
-    if string_storage == "python":
+    if using_infer_string:
+        pa = pytest.importorskip("pyarrow")
+        string_array = ArrowStringArrayNumpySemantics(pa.array(["x", "y"]))
+        string_array_na = ArrowStringArrayNumpySemantics(pa.array(["x", None]))
+
+    elif string_storage == "python":
         string_array = StringArray(np.array(["x", "y"], dtype=np.object_))
         string_array_na = StringArray(np.array(["x", NA], dtype=np.object_))