diff options
| -rw-r--r-- | mrblib/io.rb | 4 | ||||
| -rw-r--r-- | test/io.rb | 10 |
2 files changed, 14 insertions, 0 deletions
diff --git a/mrblib/io.rb b/mrblib/io.rb index d9dcaaec9..8c4a80924 100644 --- a/mrblib/io.rb +++ b/mrblib/io.rb @@ -123,6 +123,10 @@ class IO def write(string) str = string.is_a?(String) ? string : string.to_s return str.size unless str.size > 0 + if 0 < @buf.length + # reset real pos ignore buf + seek(pos, SEEK_SET) + end len = syswrite(str) len end diff --git a/test/io.rb b/test/io.rb index b654ff213..f1dd7afe8 100644 --- a/test/io.rb +++ b/test/io.rb @@ -181,6 +181,16 @@ assert('IO#write', '15.2.20.5.20') do io = IO.open(IO.sysopen($mrbtest_io_wfname)) assert_equal 0, io.write("") io.close + + io = IO.open(IO.sysopen($mrbtest_io_wfname, "r+"), "r+") + assert_equal 7, io.write("abcdefg") + io.rewind + assert_equal "ab", io.read(2) + assert_equal 3, io.write("123") + io.rewind + assert_equal "ab123fg", io.read + io.close + true end |