def truncate_string(data,
headers,
max_field_width=None,
skip_multiline_string=True,
**_):
"""Truncate very long strings. Only needed for tabular
representation, because trying to tabulate very long data
is problematic in terms of performance, and does not make any
sense visually.
:param iterable data: An :term:`iterable` (e.g. list) of rows.
:param iterable headers: The column headers.
:param int max_field_width: Width to truncate field for display
:return: The processed data and headers.
:rtype: tuple
"""
return (
([
utils.truncate_string(v, max_field_width, skip_multiline_string)
for v in row
] for row in data),
[
utils.truncate_string(h, max_field_width, skip_multiline_string)
for h in headers
],
)
def test_truncate_string():
"""Test string truncate preprocessor."""
val = 'x' * 100
assert utils.truncate_string(val, 10) == 'x' * 10
val = 'x' * 100
assert utils.truncate_string(val) == 'x' * 100
val = ['x'] * 100
val[20] = '\n'
str_val = ''.join(val)
assert utils.truncate_string(str_val, 10, skip_multiline_string=True) == str_val
def test_truncate_string():
"""Test string truncate preprocessor."""
val = "x" * 100
assert utils.truncate_string(val, 10) == "xxxxxxx..."
val = "x " * 100
assert utils.truncate_string(val, 10) == "x x x x..."
val = "x" * 100
assert utils.truncate_string(val) == "x" * 100
val = ["x"] * 100
val[20] = "\n"
str_val = "".join(val)
assert utils.truncate_string(str_val, 10,
skip_multiline_string=True) == str_val
def test_truncate_string():
"""Test string truncate preprocessor."""
val = 'x' * 1000
assert utils.truncate_string(val, 10) == 'x' * 10