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TST: ensure DataFrame.tail(0) preserves dtypes #63453

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TST: ensure DataFrame.tail(0) preserves dtypes #63453

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15 changes: 15 additions & 0 deletions pandas/tests/frame/methods/test_head_tail.py
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Original file line number Diff line number Diff line change
Expand Up @@ -3,6 +3,8 @@
from pandas import DataFrame
import pandas._testing as tm

from pandas.core.series import Series


def test_head_tail_generic(index, frame_or_series):
# GH#5370
Expand Down Expand Up @@ -55,3 +57,16 @@ def test_head_tail_empty():
empty_df = DataFrame()
tm.assert_frame_equal(empty_df.tail(), empty_df)
tm.assert_frame_equal(empty_df.head(), empty_df)

def test_tail_zero_preserves_dtypes():
df = DataFrame(
{
"A": Series([1, 2, 3], dtype="int64"),
"B": Series([1.0, 2.0, 3.0], dtype="float64"),
"C": Series(["a", "b", "c"], dtype="string"),
}
)

result = df.tail(0)

assert result.dtypes.to_dict() == df.dtypes.to_dict()
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