TST: Use more index_or_series (pandas-dev#48927)

Author: mroeschke

pandas/tests/reductions/test_reductions.py

@@ -924,10 +924,9 @@ def test_all_any(self):
         s = Series(["abc", True])
         assert s.any()
 
-    @pytest.mark.parametrize("klass", [Index, Series])
-    def test_numpy_all_any(self, klass):
+    def test_numpy_all_any(self, index_or_series):
         # GH#40180
-        idx = klass([0, 1, 2])
+        idx = index_or_series([0, 1, 2])
         assert not np.all(idx)
         assert np.any(idx)
         idx = Index([1, 2, 3])

pandas/tests/reshape/concat/test_append_common.py

@@ -70,11 +70,10 @@ def _check_expected_dtype(self, obj, label):
         else:
             raise ValueError
 
-    @pytest.mark.parametrize("box", [Index, Series])
-    def test_dtypes(self, item, box):
+    def test_dtypes(self, item, index_or_series):
         # to confirm test case covers intended dtypes
         typ, vals = item
-        obj = box(vals)
+        obj = index_or_series(vals)
         if isinstance(obj, Index):
             assert obj.dtype == typ
         elif isinstance(obj, Series):

pandas/tests/tools/test_to_datetime.py

@@ -67,7 +67,6 @@ def test_to_datetime_readonly(self, readonly):
         expected = to_datetime([])
         tm.assert_index_equal(result, expected)
 
-    @pytest.mark.parametrize("box", [Series, Index])
     @pytest.mark.parametrize(
         "format, expected",
         [
@@ -81,10 +80,10 @@ def test_to_datetime_readonly(self, readonly):
             ],
         ],
     )
-    def test_to_datetime_format(self, cache, box, format, expected):
-        values = box(["1/1/2000", "1/2/2000", "1/3/2000"])
+    def test_to_datetime_format(self, cache, index_or_series, format, expected):
+        values = index_or_series(["1/1/2000", "1/2/2000", "1/3/2000"])
         result = to_datetime(values, format=format, cache=cache)
-        expected = box(expected)
+        expected = index_or_series(expected)
         if isinstance(expected, Series):
             tm.assert_series_equal(result, expected)
         else: