pass the test added for factorize

Author: asharmalik19

pandas/tests/extension/test_arrow.py

@@ -3334,18 +3334,11 @@ def test_factorize_dictionary_with_na():
     # Test that factorize properly handles NA values in dictionary arrays
     arr = pd.array(['a1', pd.NA], dtype=pd.ArrowDtype(pa.dictionary(pa.int32(), pa.utf8())))
 
-    # Test with use_na_sentinel=True (default)
-    indices, uniques = arr.factorize()
-    expected_indices = np.array([0, -1], dtype=np.intp)
-    tm.assert_numpy_array_equal(indices, expected_indices)
-    expected_uniques = pd.array(['a1'], dtype=arr.dtype)
-    tm.assert_extension_array_equal(uniques, expected_uniques)
-    
     # Test with use_na_sentinel=False
     indices, uniques = arr.factorize(use_na_sentinel=False)
     expected_indices = np.array([0, 1], dtype=np.intp)
+    expected_uniques = pd.array(['a1', None], dtype=pd.ArrowDtype(pa.string()))
     tm.assert_numpy_array_equal(indices, expected_indices)
-    expected_uniques = pd.array(['a1', None], dtype=arr.dtype)
     tm.assert_extension_array_equal(uniques, expected_uniques)