diff options
Diffstat (limited to 'test')
| -rw-r--r-- | test/stringio/test_stringio.rb | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/test/stringio/test_stringio.rb b/test/stringio/test_stringio.rb index 417a53b383..0ea3e4f961 100644 --- a/test/stringio/test_stringio.rb +++ b/test/stringio/test_stringio.rb @@ -504,6 +504,14 @@ class TestStringIO < Test::Unit::TestCase assert_raise(RuntimeError, bug) {s.reopen("")} end + def test_frozen_string + s = StringIO.new("".freeze) + bug = '[ruby-core:48530]' + assert_raise(IOError, bug) {s.write("foo")} + assert_raise(IOError, bug) {s.ungetc("a")} + assert_raise(IOError, bug) {s.ungetbyte("a")} + end + def test_readlines_limit_0 assert_raise(ArgumentError, "[ruby-dev:43392]") { StringIO.new.readlines(0) } end |