From 132c2992574e2ebfc0678ecd0ce161fa23033f5a Mon Sep 17 00:00:00 2001
From: Brock <jbrockmendel@gmail.com>
Date: Mon, 21 Aug 2023 08:39:31 -0700
Subject: [PATCH] DEPR: BaseNoReduceTests

---
 pandas/tests/extension/base/__init__.py | 48 +++++++++++++++++++++----
 pandas/tests/extension/base/reduce.py   |  3 +-
 2 files changed, 44 insertions(+), 7 deletions(-)

diff --git a/pandas/tests/extension/base/__init__.py b/pandas/tests/extension/base/__init__.py
index 7cd55b7240d54..82b61722f5e96 100644
--- a/pandas/tests/extension/base/__init__.py
+++ b/pandas/tests/extension/base/__init__.py
@@ -56,12 +56,7 @@ class TestMyDtype(BaseDtypeTests):
     BaseUnaryOpsTests,
 )
 from pandas.tests.extension.base.printing import BasePrintingTests
-from pandas.tests.extension.base.reduce import (  # noqa: F401
-    BaseBooleanReduceTests,
-    BaseNoReduceTests,
-    BaseNumericReduceTests,
-    BaseReduceTests,
-)
+from pandas.tests.extension.base.reduce import BaseReduceTests
 from pandas.tests.extension.base.reshaping import BaseReshapingTests
 from pandas.tests.extension.base.setitem import BaseSetitemTests
 
@@ -92,3 +87,44 @@ class ExtensionTests(
     BaseSetitemTests,
 ):
     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}'"
+    )
diff --git a/pandas/tests/extension/base/reduce.py b/pandas/tests/extension/base/reduce.py
index 9b56b10681e15..3dd8caaa82ae2 100644
--- a/pandas/tests/extension/base/reduce.py
+++ b/pandas/tests/extension/base/reduce.py
@@ -129,7 +129,8 @@ def test_reduce_frame(self, data, all_numeric_reductions, skipna):
         self.check_reduce_frame(ser, op_name, skipna)
 
 
-# TODO: deprecate BaseNoReduceTests, BaseNumericReduceTests, BaseBooleanReduceTests
+# TODO(3.0): remove BaseNoReduceTests, BaseNumericReduceTests,
+#  BaseBooleanReduceTests
 class BaseNoReduceTests(BaseReduceTests):
     """we don't define any reductions"""