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-rw-r--r--test/ruby/test_string.rb5
1 files changed, 5 insertions, 0 deletions
diff --git a/test/ruby/test_string.rb b/test/ruby/test_string.rb
index 61a69b1c7b..a0584e26bf 100644
--- a/test/ruby/test_string.rb
+++ b/test/ruby/test_string.rb
@@ -1540,6 +1540,11 @@ class TestString < Test::Unit::TestCase
assert_equal("2000aaa", "1999zzz".succ)
assert_equal("AAAA0000", "ZZZ9999".succ)
assert_equal("**+", "***".succ)
+
+ bug = '[ruby-core:83062] [Bug #13952]'
+ s = "\xff".b
+ assert_not_predicate(s, :ascii_only?)
+ assert_predicate(s.succ, :ascii_only?, bug)
end
def test_succ!