TST: test passing index (and other iterables) to .loc (#27120)

closes #16712

Author: toobaz

pandas/tests/frame/test_indexing.py

@@ -76,8 +76,9 @@ def test_get_none(self, df):
         # see gh-5652
         assert df.get(None) is None
 
-    def test_loc_iterable(self, float_frame):
-        idx = iter(['A', 'B', 'C'])
+    @pytest.mark.parametrize('key_type', [iter, np.array, Series, Index])
+    def test_loc_iterable(self, float_frame, key_type):
+        idx = key_type(['A', 'B', 'C'])
         result = float_frame.loc[:, idx]
         expected = float_frame.loc[:, ['A', 'B', 'C']]
         assert_frame_equal(result, expected)