diff options
Diffstat (limited to 'test')
-rw-r--r-- | test/ruby/test_string.rb | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/test/ruby/test_string.rb b/test/ruby/test_string.rb index 7627fe12dc..824c0e6b1c 100644 --- a/test/ruby/test_string.rb +++ b/test/ruby/test_string.rb @@ -2252,6 +2252,24 @@ class TestString < Test::Unit::TestCase end; end if [0].pack("l!").bytesize < [nil].pack("p").bytesize # enable only when string size range is smaller than memory space + + def test_uplus_minus + str = "foo" + assert_equal(false, str.frozen?) + assert_equal(false, (+str).frozen?) + assert_equal(true, (-str).frozen?) + + assert_equal(str.object_id, (+str).object_id) + assert_not_equal(str.object_id, (-str).object_id) + + str = "bar".freeze + assert_equal(true, str.frozen?) + assert_equal(false, (+str).frozen?) + assert_equal(true, (-str).frozen?) + + assert_not_equal(str.object_id, (+str).object_id) + assert_equal(str.object_id, (-str).object_id) + end end class TestString2 < TestString |