From ed93778e004a2c6c2160f54d7362f14c5797d9c6 Mon Sep 17 00:00:00 2001
From: Andrew Leech <andrew.leech@planetinnovation.com.au>
Date: Tue, 10 Mar 2020 15:14:35 +1100
Subject: [PATCH] py/objstringio: Expose tell() on StringIO and BytesIO
 objects.

To match file objects.

Fixes issue #5581.
---
 py/objstringio.c             | 1 +
 tests/basics/io_stringio1.py | 5 +++++
 2 files changed, 6 insertions(+)

diff --git a/py/objstringio.c b/py/objstringio.c
index 98808e3a9..176691387 100644
--- a/py/objstringio.c
+++ b/py/objstringio.c
@@ -228,6 +228,7 @@ STATIC const mp_rom_map_elem_t stringio_locals_dict_table[] = {
     { MP_ROM_QSTR(MP_QSTR_readline), MP_ROM_PTR(&mp_stream_unbuffered_readline_obj) },
     { MP_ROM_QSTR(MP_QSTR_write), MP_ROM_PTR(&mp_stream_write_obj) },
     { MP_ROM_QSTR(MP_QSTR_seek), MP_ROM_PTR(&mp_stream_seek_obj) },
+    { MP_ROM_QSTR(MP_QSTR_tell), MP_ROM_PTR(&mp_stream_tell_obj) },
     { MP_ROM_QSTR(MP_QSTR_flush), MP_ROM_PTR(&mp_stream_flush_obj) },
     { MP_ROM_QSTR(MP_QSTR_close), MP_ROM_PTR(&mp_stream_close_obj) },
     { MP_ROM_QSTR(MP_QSTR_getvalue), MP_ROM_PTR(&stringio_getvalue_obj) },
diff --git a/tests/basics/io_stringio1.py b/tests/basics/io_stringio1.py
index 9f7c1e44e..41089f22d 100644
--- a/tests/basics/io_stringio1.py
+++ b/tests/basics/io_stringio1.py
@@ -33,6 +33,11 @@ a = io.StringIO()
 a.write("foo")
 print(a.read())
 
+a = io.StringIO()
+print(a.tell())
+a.write("foo")
+print(a.tell())
+
 a = io.StringIO()
 a.close()
 for f in [a.read, a.getvalue, lambda:a.write("")]: