TST/REF: misplaced tests in tests.base (pandas-dev#37410)

Author: jbrockmendel

pandas/tests/base/test_drop_duplicates.py

@@ -1,12 +1,14 @@
 from datetime import datetime
 
 import numpy as np
+import pytest
 
 import pandas as pd
 import pandas._testing as tm
 
 
-def test_drop_duplicates_series_vs_dataframe():
+@pytest.mark.parametrize("keep", ["first", "last", False])
+def test_drop_duplicates_series_vs_dataframe(keep):
     # GH 14192
     df = pd.DataFrame(
         {
@@ -24,7 +26,6 @@ def test_drop_duplicates_series_vs_dataframe():
         }
     )
     for column in df.columns:
-        for keep in ["first", "last", False]:
-            dropped_frame = df[[column]].drop_duplicates(keep=keep)
-            dropped_series = df[column].drop_duplicates(keep=keep)
-            tm.assert_frame_equal(dropped_frame, dropped_series.to_frame())
+        dropped_frame = df[[column]].drop_duplicates(keep=keep)
+        dropped_series = df[column].drop_duplicates(keep=keep)
+        tm.assert_frame_equal(dropped_frame, dropped_series.to_frame())

pandas/tests/base/test_misc.py

@@ -14,7 +14,6 @@
 
 import pandas as pd
 from pandas import DataFrame, Index, IntervalIndex, Series
-import pandas._testing as tm
 
 
 @pytest.mark.parametrize(
@@ -196,10 +195,3 @@ def test_access_by_position(index):
     msg = "single positional indexer is out-of-bounds"
     with pytest.raises(IndexError, match=msg):
         series.iloc[size]
-
-
-def test_get_indexer_non_unique_dtype_mismatch():
-    # GH 25459
-    indexes, missing = Index(["A", "B"]).get_indexer_non_unique(Index([0]))
-    tm.assert_numpy_array_equal(np.array([-1], dtype=np.intp), indexes)
-    tm.assert_numpy_array_equal(np.array([0], dtype=np.intp), missing)

pandas/tests/indexes/base_class/test_indexing.py

@@ -1,6 +1,8 @@
+import numpy as np
 import pytest
 
 from pandas import Index
+import pandas._testing as tm
 
 
 class TestGetSliceBounds:
@@ -24,3 +26,11 @@ def test_get_slice_bounds_outside(self, kind, side, expected, data, bound):
     def test_get_slice_bounds_invalid_side(self):
         with pytest.raises(ValueError, match="Invalid value for side kwarg"):
             Index([]).get_slice_bound("a", kind=None, side="middle")
+
+
+class TestGetIndexerNonUnique:
+    def test_get_indexer_non_unique_dtype_mismatch(self):
+        # GH#25459
+        indexes, missing = Index(["A", "B"]).get_indexer_non_unique(Index([0]))
+        tm.assert_numpy_array_equal(np.array([-1], dtype=np.intp), indexes)
+        tm.assert_numpy_array_equal(np.array([0], dtype=np.intp), missing)