Removed the test_utils module from the examples.

This fixes issue #470

Author: denisra

examples/cacheclt.py

@@ -5,7 +5,6 @@
 
 import argparse
 import asyncio
-import asyncio.test_utils
 import json
 import logging
 
@@ -173,7 +172,12 @@ def main():
         loop = asyncio.new_event_loop()
     sslctx = None
     if args.tls:
-        sslctx = test_utils.dummy_ssl_context()
+        try:
+            import ssl
+        except ImportError as exc:
+            logging.info('SSL not available: %r' % exc)
+        else:
+            sslctx = ssl.SSLContext(ssl.PROTOCOL_SSLv23)
     cache = CacheClient(args.host, args.port, sslctx=sslctx, loop=loop)
     try:
         loop.run_until_complete(

examples/source.py

@@ -2,7 +2,6 @@
 
 import argparse
 import asyncio
-import asyncio.test_utils
 import sys
 
 
@@ -72,7 +71,12 @@ def connection_lost(self, exc):
 def start(loop, host, port):
     sslctx = None
     if args.tls:
-        sslctx = test_utils.dummy_ssl_context()
+        try:
+            import ssl
+        except ImportError as exc:
+            print('SSL not available: %r' % exc)
+        else:
+            sslctx = ssl.SSLContext(ssl.PROTOCOL_SSLv23)
     tr, pr = yield from loop.create_connection(Client, host, port,
                                                ssl=sslctx)
     dprint('tr =', tr)

examples/source1.py

@@ -2,7 +2,6 @@
 
 import argparse
 import asyncio
-import asyncio.test_utils
 import sys
 
 
@@ -54,9 +53,14 @@ def start(loop, args):
     d = Debug()
     total = 0
     sslctx = None
-    if args.tls:
-        d.print('using dummy SSLContext')
-        sslctx = test_utils.dummy_ssl_context()
+    if args.tls:        
+        try:
+            import ssl
+        except ImportError as exc:
+            print('SSL not available: %r' % exc)
+        else:
+            d.print('using dummy SSLContext')
+            sslctx = ssl.SSLContext(ssl.PROTOCOL_SSLv23)
     r, w = yield from asyncio.open_connection(args.host, args.port, ssl=sslctx)
     d.print('r =', r)
     d.print('w =', w)