def test_to_pandas():
df = get_complete_df()
df.to_arrow()
df.to_pandas()
# test shifted df
df.shift(2).to_pandas()
df = DataFrame({"col": Series([True, False, True])})
df.shift(2).to_pandas()
def test_shift():
df = DataFrame({"A": ["a", "b", "c"], "B": [1, 3, 5]})
a = df.shift(1)
b = DataFrame({"A": [None, "a", "b"], "B": [None, 1, 3]}, nullable=True)
assert a.frame_equal(b, null_equal=True)
