diff options
Diffstat (limited to 'test')
-rw-r--r-- | test/ruby/test_sprintf.rb | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/test/ruby/test_sprintf.rb b/test/ruby/test_sprintf.rb index 595bf6d782..c80f88b15e 100644 --- a/test/ruby/test_sprintf.rb +++ b/test/ruby/test_sprintf.rb @@ -451,4 +451,14 @@ class TestSprintf < Test::Unit::TestCase bug = 'https://github.com/mruby/mruby/issues/3347' assert_equal("!", sprintf("%*c", 0, ?!.ord), bug) end + + def test_no_hidden_garbage + fmt = [4, 2, 2].map { |x| "%0#{x}d" }.join('-') # defeats optimization + ObjectSpace.count_objects(res = {}) # creates strings on first call + before = ObjectSpace.count_objects(res)[:T_STRING] + val = sprintf(fmt, 1970, 1, 1) + after = ObjectSpace.count_objects(res)[:T_STRING] + assert_equal before + 1, after, 'only new string is the created one' + assert_equal '1970-01-01', val + end end |