diff options
Diffstat (limited to 'test/ruby/test_io.rb')
-rw-r--r-- | test/ruby/test_io.rb | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/test/ruby/test_io.rb b/test/ruby/test_io.rb index f456779880..69e3666cff 100644 --- a/test/ruby/test_io.rb +++ b/test/ruby/test_io.rb @@ -118,6 +118,22 @@ class TestIO < Test::Unit::TestCase r.close end + def test_ungetbyte + t = make_tempfile + t.open + t.ungetbyte(0x41) + assert_equal(0x41, t.getbyte) + t.rewind + t.ungetbyte("qux") + assert_equal("quxfoo\n", t.gets) + t.set_encoding("utf-8") + t.ungetbyte(0x89) + t.ungetbyte(0x8e) + t.ungetbyte("\xe7") + t.ungetbyte("\xe7\xb4\x85") + assert_equal("\u7d05\u7389bar\n", t.gets) + end + def test_each_byte r, w = IO.pipe w << "abc def" |