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-rw-r--r--test/ruby/test_string.rb11
1 files changed, 11 insertions, 0 deletions
diff --git a/test/ruby/test_string.rb b/test/ruby/test_string.rb
index 55cef90..869e31b 100644
--- a/test/ruby/test_string.rb
+++ b/test/ruby/test_string.rb
@@ -683,6 +683,17 @@ class TestString < Test::Unit::TestCase
assert(S("hello").hash != S("helLO").hash)
end
+ def test_hash_random
+ str = 'abc'
+ a = [str.hash.to_s]
+ 3.times {
+ EnvUtil.rubyexec("-e", "print #{str.dump}.hash") {|i,o,e|
+ a << o.read
+ }
+ }
+ assert_not_equal([str.hash.to_s], a.uniq)
+ end
+
def test_hex
assert_equal(255, S("0xff").hex)
assert_equal(-255, S("-0xff").hex)