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from unittest import TestCase
from _pyrepl.utils import str_width, wlen
class TestUtils(TestCase):
def test_str_width(self):
characters = [
'a',
'1',
'_',
'!',
'\x1a',
'\u263A',
'\uffb9',
'\N{LATIN SMALL LETTER E WITH ACUTE}', # é
'\N{LATIN SMALL LETTER E WITH CEDILLA}', # ȩ
'\u00ad',
]
for c in characters:
self.assertEqual(str_width(c), 1)
zero_width_characters = [
'\N{COMBINING ACUTE ACCENT}',
'\N{ZERO WIDTH JOINER}',
]
for c in zero_width_characters:
with self.subTest(character=c):
self.assertEqual(str_width(c), 0)
characters = [chr(99989), chr(99999)]
for c in characters:
self.assertEqual(str_width(c), 2)
def test_wlen(self):
for c in ['a', 'b', '1', '!', '_']:
self.assertEqual(wlen(c), 1)
self.assertEqual(wlen('\x1a'), 2)
char_east_asian_width_N = chr(3800)
self.assertEqual(wlen(char_east_asian_width_N), 1)
char_east_asian_width_W = chr(4352)
self.assertEqual(wlen(char_east_asian_width_W), 2)
self.assertEqual(wlen('hello'), 5)
self.assertEqual(wlen('hello' + '\x1a'), 7)
self.assertEqual(wlen('e\N{COMBINING ACUTE ACCENT}'), 1)
self.assertEqual(wlen('a\N{ZERO WIDTH JOINER}b'), 2)
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