additional test fixes (for tests that changed or no longer exist on main)

Author: jorisvandenbossche

pandas/tests/frame/methods/test_align.py

@@ -3,6 +3,8 @@
 import numpy as np
 import pytest
 
+from pandas._config import using_string_dtype
+
 import pandas as pd
 from pandas import (
     DataFrame,
@@ -155,6 +157,7 @@ def test_align_series_condition(self):
         expected = DataFrame({"a": [0, 2, 0], "b": [0, 5, 0]})
         tm.assert_frame_equal(result, expected)
 
+    @pytest.mark.xfail(using_string_dtype(), reason="TODO(infer_string)")
     def test_align_int(self, int_frame):
         # test other non-float types
         other = DataFrame(index=range(5), columns=["A", "B", "C"])

pandas/tests/frame/methods/test_to_csv.py

@@ -35,6 +35,7 @@ def read_csv(self, path, **kwargs):
 
         return read_csv(path, **params)
 
+    @pytest.mark.xfail(using_string_dtype(), reason="TODO(infer_string)")
     def test_to_csv_from_csv1(self, float_frame, datetime_frame):
         with tm.ensure_clean("__tmp_to_csv_from_csv1__") as path:
             float_frame.iloc[:5, float_frame.columns.get_loc("A")] = np.nan

pandas/tests/groupby/test_raises.py

@@ -219,7 +219,7 @@ def func(x):
         getattr(gb, how)(func)
 
 
-@pytest.mark.xfail(using_string_dtype(), reason="TODO(infer_string)")
+@pytest.mark.xfail(using_string_dtype(), reason="TODO(infer_string)", strict=False)
 @pytest.mark.parametrize("how", ["agg", "transform"])
 @pytest.mark.parametrize("groupby_func_np", [np.sum, np.mean])
 def test_groupby_raises_string_np(

pandas/tests/io/test_pickle.py

@@ -413,10 +413,16 @@ def test_read(self, protocol, get_random_path):
 @pytest.mark.parametrize(
     ["pickle_file", "excols"],
     [
-        ("test_py27.pkl", Index(["a", "b", "c"])),
+        ("test_py27.pkl", Index(["a", "b", "c"], dtype=object)),
         (
             "test_mi_py27.pkl",
-            pd.MultiIndex.from_arrays([["a", "b", "c"], ["A", "B", "C"]]),
+            pd.MultiIndex(
+                [
+                    Index(["a", "b", "c"], dtype=object),
+                    Index(["A", "B", "C"], dtype=object),
+                ],
+                [np.array([0, 1, 2]), np.array([0, 1, 2])],
+            ),
         ),
     ],
 )

pandas/tests/io/test_stata.py

@@ -1563,8 +1563,8 @@ def test_path_pathlib(self):
     def test_pickle_path_localpath(self):
         df = DataFrame(
             1.1 * np.arange(120).reshape((30, 4)),
-            columns=pd.Index(list("ABCD"), dtype=object),
-            index=pd.Index([f"i-{i}" for i in range(30)], dtype=object),
+            columns=pd.Index(list("ABCD")),
+            index=pd.Index([f"i-{i}" for i in range(30)]),
         )
         df.index.name = "index"
         reader = lambda x: read_stata(x).set_index("index")

pandas/tests/tools/test_to_datetime.py

@@ -1207,10 +1207,8 @@ def test_out_of_bounds_errors_ignore2(self):
         # GH#12424
         msg = "errors='ignore' is deprecated"
         with tm.assert_produces_warning(FutureWarning, match=msg):
-            res = to_datetime(
-                Series(["2362-01-01", np.nan], dtype=object), errors="ignore"
-            )
-        exp = Series(["2362-01-01", np.nan], dtype=object)
+            res = to_datetime(Series(["2362-01-01", np.nan]), errors="ignore")
+        exp = Series(["2362-01-01", np.nan])
         tm.assert_series_equal(res, exp)
 
     def test_to_datetime_tz(self, cache):