Add failing test

Author: znicholls

pandas/tests/test_downstream.py

@@ -13,6 +13,7 @@
 import pandas as pd
 from pandas import (
     DataFrame,
+    Index,
     Series,
 )
 import pandas._testing as tm
@@ -133,6 +134,21 @@ def test_xarray_cftimeindex_nearest():
     assert result == expected
 
 
+@td.skip_if_no("cftime")
+@td.skip_if_no("xarray")
+def test_xarray_cftimeindex_reset_index():
+    import xarray
+
+    df = DataFrame(
+        [[1, 2], [3, 4]],
+        columns=xarray.cftime_range("0001", periods=2),
+        index=Index(["hi", "bye"], name="string"),
+    )
+    # currently fails with TypeError
+    res = df.reset_index()
+    assert res.columns[0] == "string"
+
+
 def test_oo_optimizable():
     # GH 21071
     subprocess.check_call([sys.executable, "-OO", "-c", "import pandas"])