Develop pre check (#38663)

* Add the check-no-pd-class hook

* make check more generic

* change instance of pd.testing in test class

* Update .pre-commit-config.yaml

* Add wildcard to entry in pre-commit config file

* Add check to import test check

* Update .pre-commit-config.yaml

Co-authored-by: Marco Gorelli <[email protected]>

Co-authored-by: Marco Gorelli <[email protected]>

Author: cjlynch278

.pre-commit-config.yaml

@@ -89,6 +89,9 @@ repos:
             # No direct imports from conftest
             conftest\ import|
             import\ conftest
+
+            # Check for use of pandas.testing instead of tm
+            pd\.testing\.
         types: [python]
         files: ^pandas/tests/
     -   id: incorrect-code-directives

pandas/tests/groupby/aggregate/test_aggregate.py

@@ -1049,7 +1049,7 @@ def test_groupby_get_by_index():
     df = DataFrame({"A": ["S", "W", "W"], "B": [1.0, 1.0, 2.0]})
     res = df.groupby("A").agg({"B": lambda x: x.get(x.index[-1])})
     expected = DataFrame({"A": ["S", "W"], "B": [1.0, 2.0]}).set_index("A")
-    pd.testing.assert_frame_equal(res, expected)
+    tm.assert_frame_equal(res, expected)
 
 
 @pytest.mark.parametrize(