DEPR: remove deprecated extension test classes (#58053)

Author: jbrockmendel

doc/source/whatsnew/v3.0.0.rst

@@ -212,6 +212,7 @@ Removal of prior version deprecations/changes
 - Disallow units other than "s", "ms", "us", "ns" for datetime64 and timedelta64 dtypes in :func:`array` (:issue:`53817`)
 - Removed "freq" keyword from :class:`PeriodArray` constructor, use "dtype" instead (:issue:`52462`)
 - Removed deprecated "method" and "limit" keywords from :meth:`Series.replace` and :meth:`DataFrame.replace` (:issue:`53492`)
+- Removed extension test classes ``BaseNoReduceTests``, ``BaseNumericReduceTests``, ``BaseBooleanReduceTests`` (:issue:`54663`)
 - Removed the "closed" and "normalize" keywords in :meth:`DatetimeIndex.__new__` (:issue:`52628`)
 - Stopped performing dtype inference with in :meth:`Index.insert` with object-dtype index; this often affects the index/columns that result when setting new entries into an empty :class:`Series` or :class:`DataFrame` (:issue:`51363`)
 - Removed the "closed" and "unit" keywords in :meth:`TimedeltaIndex.__new__` (:issue:`52628`, :issue:`55499`)

pandas/tests/extension/base/__init__.py

@@ -64,9 +64,7 @@ class TestMyDtype(BaseDtypeTests):
 
 # One test class that you can inherit as an alternative to inheriting all the
 # test classes above.
-# Note 1) this excludes Dim2CompatTests and NDArrayBacked2DTests.
-# Note 2) this uses BaseReduceTests and and _not_ BaseBooleanReduceTests,
-#  BaseNoReduceTests, or BaseNumericReduceTests
+# Note this excludes Dim2CompatTests and NDArrayBacked2DTests.
 class ExtensionTests(
     BaseAccumulateTests,
     BaseCastingTests,
@@ -89,44 +87,3 @@ class ExtensionTests(
     Dim2CompatTests,
 ):
     pass
-
-
-def __getattr__(name: str):
-    import warnings
-
-    if name == "BaseNoReduceTests":
-        warnings.warn(
-            "BaseNoReduceTests is deprecated and will be removed in a "
-            "future version. Use BaseReduceTests and override "
-            "`_supports_reduction` instead.",
-            FutureWarning,
-        )
-        from pandas.tests.extension.base.reduce import BaseNoReduceTests
-
-        return BaseNoReduceTests
-
-    elif name == "BaseNumericReduceTests":
-        warnings.warn(
-            "BaseNumericReduceTests is deprecated and will be removed in a "
-            "future version. Use BaseReduceTests and override "
-            "`_supports_reduction` instead.",
-            FutureWarning,
-        )
-        from pandas.tests.extension.base.reduce import BaseNumericReduceTests
-
-        return BaseNumericReduceTests
-
-    elif name == "BaseBooleanReduceTests":
-        warnings.warn(
-            "BaseBooleanReduceTests is deprecated and will be removed in a "
-            "future version. Use BaseReduceTests and override "
-            "`_supports_reduction` instead.",
-            FutureWarning,
-        )
-        from pandas.tests.extension.base.reduce import BaseBooleanReduceTests
-
-        return BaseBooleanReduceTests
-
-    raise AttributeError(
-        f"module 'pandas.tests.extension.base' has no attribute '{name}'"
-    )

pandas/tests/extension/base/reduce.py

@@ -129,25 +129,3 @@ def test_reduce_frame(self, data, all_numeric_reductions, skipna):
             pytest.skip(f"Reduction {op_name} not supported for this dtype")
 
         self.check_reduce_frame(ser, op_name, skipna)
-
-
-# TODO(3.0): remove BaseNoReduceTests, BaseNumericReduceTests,
-#  BaseBooleanReduceTests
-class BaseNoReduceTests(BaseReduceTests):
-    """we don't define any reductions"""
-
-
-class BaseNumericReduceTests(BaseReduceTests):
-    # For backward compatibility only, this only runs the numeric reductions
-    def _supports_reduction(self, ser: pd.Series, op_name: str) -> bool:
-        if op_name in ["any", "all"]:
-            pytest.skip("These are tested in BaseBooleanReduceTests")
-        return True
-
-
-class BaseBooleanReduceTests(BaseReduceTests):
-    # For backward compatibility only, this only runs the numeric reductions
-    def _supports_reduction(self, ser: pd.Series, op_name: str) -> bool:
-        if op_name not in ["any", "all"]:
-            pytest.skip("These are tested in BaseNumericReduceTests")
-        return True