tests/extmod/ujson_dump_iobase.py: Return number of bytes written.

Otherwise returning None indicates that the write would block and nothing was actually written. Fixes issue #3990.
2018-07-30 12:05:48 +10:00 · 2018-07-30 12:05:48 +10:00 · 571295d090
commit 571295d090
parent 11a38d5dc5
1 changed files with 1 additions and 0 deletions
--- a/tests/extmod/ujson_dump_iobase.py
+++ b/tests/extmod/ujson_dump_iobase.py
@ -24,6 +24,7 @@ class S(io.IOBase):
            # uPy passes a bytearray, CPython passes a str
            buf = str(buf, 'ascii')
        self.buf += buf
+        return len(buf)


 # dump to the user stream