TST: avoid/suppress DeprecationWarnings (#37570)

Author: jbrockmendel

pandas/core/arrays/boolean.py

@@ -664,6 +664,11 @@ def _arith_method(self, other, op):
                 dtype = "bool"
             result = np.zeros(len(self._data), dtype=dtype)
         else:
+            if op_name in {"pow", "rpow"} and isinstance(other, np.bool_):
+                # Avoid DeprecationWarning: In future, it will be an error
+                #  for 'np.bool_' scalars to be interpreted as an index
+                other = bool(other)
+
             with np.errstate(all="ignore"):
                 result = op(self._data, other)
 

pandas/tests/indexes/test_index_new.py

@@ -90,16 +90,25 @@ def test_constructor_infer_nat_dt_like(
         data = [ctor]
         data.insert(pos, nulls_fixture)
 
+        warn = None
         if nulls_fixture is NA:
             expected = Index([NA, NaT])
             mark = pytest.mark.xfail(reason="Broken with np.NaT ctor; see GH 31884")
             request.node.add_marker(mark)
+            # GH#35942 numpy will emit a DeprecationWarning within the
+            #  assert_index_equal calls.  Since we can't do anything
+            #  about it until GH#31884 is fixed, we suppress that warning.
+            warn = DeprecationWarning
 
         result = Index(data)
-        tm.assert_index_equal(result, expected)
+
+        with tm.assert_produces_warning(warn):
+            tm.assert_index_equal(result, expected)
 
         result = Index(np.array(data, dtype=object))
-        tm.assert_index_equal(result, expected)
+
+        with tm.assert_produces_warning(warn):
+            tm.assert_index_equal(result, expected)
 
     @pytest.mark.parametrize("swap_objs", [True, False])
     def test_constructor_mixed_nat_objs_infers_object(self, swap_objs):