def test_warns_non_roundtrippable_names(self, idx):
# GH 19130
df = pd.DataFrame(index=idx)
df.index.name = "index"
with tm.assert_produces_warning():
set_default_names(df)
def test_set_names_unset(self, idx, nm, prop):
data = pd.Series(1, idx)
result = set_default_names(data)
assert getattr(result.index, prop) == nm