def test_to_frame(stream):
df = pd.DataFrame({'x': [1, 2, 3], 'y': [4, 5, 6]})
sdf = DataFrame(example=df, stream=stream)
assert sdf.to_frame() is sdf
a = sdf.x.to_frame()
assert isinstance(a, DataFrame)
assert list(a.columns) == ['x']
def test_to_frame(stream):
df = cudf.DataFrame({"x": [1, 2, 3], "y": [4, 5, 6]})
sdf = DataFrame(example=df, stream=stream)
assert sdf.to_frame() is sdf
a = sdf.x.to_frame()
assert isinstance(a, DataFrame)
assert list(a.columns) == ["x"]
