Accept mutable bytes-like objects

Lib/test/test_ssl.py

 # Test the support for SSL and sockets
 
 import sys
 import unittest
 from test import support
 import socket
 import select
 import time
 import datetime
 import gc
@@ skipping 153 matching lines @@
             self.assertRaises(ssl.SSLError, ssl.RAND_bytes, 16)
 
         # negative num is invalid
         self.assertRaises(ValueError, ssl.RAND_bytes, -5)
         self.assertRaises(ValueError, ssl.RAND_pseudo_bytes, -5)
 
         if hasattr(ssl, 'RAND_egd'):
             self.assertRaises(TypeError, ssl.RAND_egd, 1)
             self.assertRaises(TypeError, ssl.RAND_egd, 'foo', 1)
         ssl.RAND_add("this is a random string", 75.0)
+        ssl.RAND_add(b"this is a random bytes object", 75.0)
+        ssl.RAND_add(bytearray(b"this is a random bytearray object"), 75.0)
 
     @unittest.skipUnless(os.name == 'posix', 'requires posix')
     def test_random_fork(self):
         status = ssl.RAND_status()
         if not status:
             self.fail("OpenSSL's PRNG has insufficient randomness")
 
         rfd, wfd = os.pipe()
         pid = os.fork()
         if pid == 0:
@@ skipping 3150 matching lines @@
             tests.append(ThreadedTests)
 
     try:
         support.run_unittest(*tests)
     finally:
         if _have_threads:
             support.threading_cleanup(*thread_info)
 
 if __name__ == "__main__":
     test_main()