Backport PR #50129 on branch 1.5.x (CI: fix with new numpy nightly) (#50167)

Backport PR #50129: CI: fix with new numpy nightly

Author: MarcoGorelli

pandas/tests/dtypes/test_missing.py

@@ -9,6 +9,7 @@
 
 from pandas._libs import missing as libmissing
 from pandas._libs.tslibs import iNaT
+from pandas.compat import is_numpy_dev
 
 from pandas.core.dtypes.common import (
     is_float,
@@ -461,7 +462,7 @@ def test_array_equivalent_series(val):
     cm = (
         # stacklevel is chosen to make sense when called from .equals
         tm.assert_produces_warning(FutureWarning, match=msg, check_stacklevel=False)
-        if isinstance(val, str)
+        if isinstance(val, str) and not is_numpy_dev
         else nullcontext()
     )
     with cm:

pandas/tests/indexes/object/test_indexing.py

@@ -128,6 +128,13 @@ def test_get_indexer_non_unique_np_nats(self, np_nat_fixture, np_nat_fixture2):
             tm.assert_numpy_array_equal(missing, expected_missing)
         # dt64nat vs td64nat
         else:
+            try:
+                np_nat_fixture == np_nat_fixture2
+            except (TypeError, OverflowError):
+                # Numpy will raise on uncomparable types, like
+                # np.datetime64('NaT', 'Y') and np.datetime64('NaT', 'ps')
+                # https://github.com/numpy/numpy/issues/22762
+                return
             index = Index(
                 np.array(
                     [

pandas/tests/series/methods/test_equals.py

@@ -5,6 +5,7 @@
 import pytest
 
 from pandas._libs.missing import is_matching_na
+from pandas.compat import is_numpy_dev
 
 from pandas.core.dtypes.common import is_float
 
@@ -50,7 +51,7 @@ def test_equals_list_array(val):
 
     cm = (
         tm.assert_produces_warning(FutureWarning, check_stacklevel=False)
-        if isinstance(val, str)
+        if isinstance(val, str) and not is_numpy_dev
         else nullcontext()
     )
     with cm: