fix test__socketpair

gevent/_socket3.py

@@ -5,6 +5,7 @@ import time
 from gevent import _socketcommon
 import _socket
 from io import BlockingIOError
+from os import dup
 
 for key in _socketcommon.__dict__:
     if key.startswith('__'):

greentest/test__socketpair.py

@@ -6,15 +6,15 @@ import unittest
 class Test(unittest.TestCase):
 
     def test(self):
-        msg = 'hello world'
+        msg = b'hello world'
         x, y = socket.socketpair()
         x.sendall(msg)
         x.close()
-        read = y.makefile().read()
+        read = y.makefile('rb').read()
         self.assertEqual(msg, read)
 
     def test_fromfd(self):
-        msg = 'hello world'
+        msg = b'hello world'
         x, y = socket.socketpair()
         xx = socket.fromfd(x.fileno(), x.family, socket.SOCK_STREAM)
         x.close()
@@ -23,7 +23,7 @@ class Test(unittest.TestCase):
 
         xx.sendall(msg)
         xx.close()
-        read = yy.makefile().read()
+        read = yy.makefile('rb').read()
         self.assertEqual(msg, read)
 
 

known_failures.py

@@ -94,7 +94,6 @@ test__pywsgi.py
 test__socket_ex.py
 test__example_echoserver.py
 test__makefile_ref.py
-test__socketpair.py
 test__server_pywsgi.py
 test__core_stat.py
 test__example_portforwarder.py