TST: un-xfail string tests specific to object

Author: jbrockmendel

pandas/tests/copy_view/test_interp_fillna.py

@@ -1,8 +1,6 @@
 import numpy as np
 import pytest
 
-from pandas._config import using_string_dtype
-
 from pandas import (
     NA,
     DataFrame,
@@ -112,18 +110,18 @@ def test_interp_fill_functions_inplace(func, dtype):
     assert view._mgr._has_no_reference(0)
 
 
-@pytest.mark.xfail(using_string_dtype(), reason="TODO(infer_string)")
 def test_interpolate_cannot_with_object_dtype():
     df = DataFrame({"a": ["a", np.nan, "c"], "b": 1})
+    df["a"] = df["a"].astype(object)
 
     msg = "DataFrame cannot interpolate with object dtype"
     with pytest.raises(TypeError, match=msg):
         df.interpolate()
 
 
-@pytest.mark.xfail(using_string_dtype(), reason="TODO(infer_string)")
 def test_interpolate_object_convert_no_op():
     df = DataFrame({"a": ["a", "b", "c"], "b": 1})
+    df["a"] = df["a"].astype(object)
     arr_a = get_array(df, "a")
 
     # Now CoW makes a copy, it should not!

pandas/tests/copy_view/test_replace.py

@@ -257,10 +257,9 @@ def test_replace_empty_list():
     assert not df2._mgr._has_no_reference(0)
 
 
-@pytest.mark.xfail(using_string_dtype(), reason="TODO(infer_string)")
 @pytest.mark.parametrize("value", ["d", None])
 def test_replace_object_list_inplace(value):
-    df = DataFrame({"a": ["a", "b", "c"]})
+    df = DataFrame({"a": ["a", "b", "c"]}, dtype=object)
     arr = get_array(df, "a")
     df.replace(["c"], value, inplace=True)
     assert np.shares_memory(arr, get_array(df, "a"))