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-rw-r--r--Lib/test/test_unicode.py13
1 files changed, 12 insertions, 1 deletions
diff --git a/Lib/test/test_unicode.py b/Lib/test/test_unicode.py
index 8be16c8da9..7bd7f51b59 100644
--- a/Lib/test/test_unicode.py
+++ b/Lib/test/test_unicode.py
@@ -12,6 +12,7 @@ import operator
import struct
import sys
import textwrap
+import unicodedata
import unittest
import warnings
from test import support, string_tests
@@ -617,11 +618,21 @@ class UnicodeTest(string_tests.CommonTest,
self.checkequalnofix(True, '\u2000', 'isspace')
self.checkequalnofix(True, '\u200a', 'isspace')
self.checkequalnofix(False, '\u2014', 'isspace')
- # apparently there are no non-BMP spaces chars in Unicode 6
+ # There are no non-BMP whitespace chars as of Unicode 12.
for ch in ['\U00010401', '\U00010427', '\U00010429', '\U0001044E',
'\U0001F40D', '\U0001F46F']:
self.assertFalse(ch.isspace(), '{!a} is not space.'.format(ch))
+ @support.requires_resource('cpu')
+ def test_isspace_invariant(self):
+ for codepoint in range(sys.maxunicode + 1):
+ char = chr(codepoint)
+ bidirectional = unicodedata.bidirectional(char)
+ category = unicodedata.category(char)
+ self.assertEqual(char.isspace(),
+ (bidirectional in ('WS', 'B', 'S')
+ or category == 'Zs'))
+
def test_isalnum(self):
super().test_isalnum()
for ch in ['\U00010401', '\U00010427', '\U00010429', '\U0001044E',