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-rw-r--r--test/pack.rb4
1 files changed, 4 insertions, 0 deletions
diff --git a/test/pack.rb b/test/pack.rb
index e9f5fb040..f518ca4fa 100644
--- a/test/pack.rb
+++ b/test/pack.rb
@@ -158,4 +158,8 @@ assert 'pack/unpack "U"' do
assert_equal "こんにちは世界", [12371, 12435, 12395, 12385, 12399, 19990, 30028].pack("U*")
assert_equal "\000", [0].pack("U")
+
+ assert_raise(RangeError) { [-0x40000000].pack("U") }
+ assert_raise(RangeError) { [-1].pack("U") }
+ assert_raise(RangeError) { [0x40000000].pack("U") }
end