[U-Boot] [PATCH 5/8] test/py: Encode/decode strings for stdio

[Paul Burton]

When reading stdin python 3.x will give us byte arrays, and when writing
stdout or stderr it will expect byte arrays. In order to insulate the
rest of the code from this difference, call encode or decode at
appropriate points when reading or writing stdio files. This works fine
on python 2.x too.

Signed-off-by: Paul Burton <paul.burton at imgtec.com>
---

 test/py/multiplexed_log.py | 4 ++--
 test/py/tests/test_ut.py   | 2 +-
 test/py/u_boot_spawn.py    | 4 ++--
 3 files changed, 5 insertions(+), 5 deletions(-)

diff --git a/test/py/multiplexed_log.py b/test/py/multiplexed_log.py
index bf926c3e77..21bdcb7309 100644
--- a/test/py/multiplexed_log.py
+++ b/test/py/multiplexed_log.py
@@ -140,11 +140,11 @@ class RunAndLog(object):
             if stdout:
                 if stderr:
                     output += 'stdout:\n'
-                output += stdout
+                output += stdout.decode('utf8')
             if stderr:
                 if stdout:
                     output += 'stderr:\n'
-                output += stderr
+                output += stderr.decode('utf8')
             exit_status = p.returncode
             exception = None
         except subprocess.CalledProcessError as cpe:
diff --git a/test/py/tests/test_ut.py b/test/py/tests/test_ut.py
index 5c25a2d465..1f40e2c2d0 100644
--- a/test/py/tests/test_ut.py
+++ b/test/py/tests/test_ut.py
@@ -14,7 +14,7 @@ def test_ut_dm_init(u_boot_console):
         data = 'this is a test'
         data += '\x00' * ((4 * 1024 * 1024) - len(data))
         with open(fn, 'wb') as fh:
-            fh.write(data)
+            fh.write(data.encode('utf-8'))
 
     fn = u_boot_console.config.source_dir + '/spi.bin'
     if not os.path.exists(fn):
diff --git a/test/py/u_boot_spawn.py b/test/py/u_boot_spawn.py
index 638c5dd31d..751302a529 100644
--- a/test/py/u_boot_spawn.py
+++ b/test/py/u_boot_spawn.py
@@ -114,7 +114,7 @@ class Spawn(object):
             Nothing.
         """
 
-        os.write(self.fd, data)
+        os.write(self.fd, data.encode('utf8'))
 
     def expect(self, patterns):
         """Wait for the sub-process to emit specific data.
@@ -172,7 +172,7 @@ class Spawn(object):
                 events = self.poll.poll(poll_maxwait)
                 if not events:
                     raise Timeout()
-                c = os.read(self.fd, 1024)
+                c = os.read(self.fd, 1024).decode('utf8')
                 if not c:
                     raise EOFError()
                 if self.logfile_read:
-- 
2.14.1