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TST: added test for to_string when max_rows is zero (GH35394) #43300

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Merged
merged 2 commits into from
Sep 1, 2021
Merged

TST: added test for to_string when max_rows is zero (GH35394) #43300

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3c51e96
TST: added test for to_string when max_rows is zero (GH35394)
lorenzophys Aug 30, 2021
26e7fcd
TST: code review fixes, removed redundant test and empty line
lorenzophys Sep 1, 2021
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23 changes: 23 additions & 0 deletions pandas/tests/io/formats/test_to_string.py
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Original file line number Diff line number Diff line change
Expand Up @@ -315,3 +315,26 @@ def test_to_string_na_rep_and_float_format(na_rep):
1 A {na_rep}"""
)
assert result == expected


@pytest.mark.parametrize(
"data,expected",
[
(
{"col1": [1, 2], "col2": [3, 4]},
" col1 col2\n0 1 3\n1 2 4",
),
(
{"col1": ["Abc", 0.756], "col2": [np.nan, 4.5435]},
" col1 col2\n0 Abc NaN\n1 0.756 4.5435",
),
(
{"col1": [np.nan, "a"], "col2": [0.009, 3.543], "col3": ["Abc", 23]},
" col1 col2 col3\n0 NaN 0.009 Abc\n1 a 3.543 23",
),
],
)
def test_to_string_max_rows_zero(data, expected):
# GH35394
result = DataFrame(data=data).to_string(max_rows=0)
assert result == expected