Move CLIENT/SERVER_CONTEXT to utils.

Then we can reuse them for testing other implementations.

tests/sync/client.py

@@ -1,23 +1,15 @@
 import contextlib
-import ssl
 
 from websockets.sync.client import *
 from websockets.sync.server import WebSocketServer
 
-from ..utils import CERTIFICATE
-
 
 __all__ = [
-    "CLIENT_CONTEXT",
     "run_client",
     "run_unix_client",
 ]
 
 
-CLIENT_CONTEXT = ssl.SSLContext(ssl.PROTOCOL_TLS_CLIENT)
-CLIENT_CONTEXT.load_verify_locations(CERTIFICATE)
-
-
 @contextlib.contextmanager
 def run_client(wsuri_or_server, secure=None, resource_name="/", **kwargs):
     if isinstance(wsuri_or_server, str):

tests/sync/server.py

@@ -1,25 +1,8 @@
 import contextlib
-import ssl
 import threading
 
 from websockets.sync.server import *
 
-from ..utils import CERTIFICATE
-
-
-SERVER_CONTEXT = ssl.SSLContext(ssl.PROTOCOL_TLS_SERVER)
-SERVER_CONTEXT.load_cert_chain(CERTIFICATE)
-
-# Work around https://github.com/openssl/openssl/issues/7967
-
-# This bug causes connect() to hang in tests for the client. Including this
-# workaround acknowledges that the issue could happen outside of the test suite.
-
-# It shouldn't happen too often, or else OpenSSL 1.1.1 would be unusable. If it
-# happens, we can look for a library-level fix, but it won't be easy.
-
-SERVER_CONTEXT.num_tickets = 0
-
 
 def crash(ws):
     raise RuntimeError

tests/sync/test_client.py

@@ -7,9 +7,15 @@
 from websockets.extensions.permessage_deflate import PerMessageDeflate
 from websockets.sync.client import *
 
-from ..utils import MS, DeprecationTestCase, temp_unix_socket_path
-from .client import CLIENT_CONTEXT, run_client, run_unix_client
-from .server import SERVER_CONTEXT, do_nothing, run_server, run_unix_server
+from ..utils import (
+    CLIENT_CONTEXT,
+    MS,
+    SERVER_CONTEXT,
+    DeprecationTestCase,
+    temp_unix_socket_path,
+)
+from .client import run_client, run_unix_client
+from .server import do_nothing, run_server, run_unix_server
 
 
 class ClientTests(unittest.TestCase):

tests/sync/test_server.py

@@ -14,10 +14,15 @@
 from websockets.http11 import Request, Response
 from websockets.sync.server import *
 
-from ..utils import MS, DeprecationTestCase, temp_unix_socket_path
-from .client import CLIENT_CONTEXT, run_client, run_unix_client
-from .server import (
+from ..utils import (
+    CLIENT_CONTEXT,
+    MS,
     SERVER_CONTEXT,
+    DeprecationTestCase,
+    temp_unix_socket_path,
+)
+from .client import run_client, run_unix_client
+from .server import (
     EvalShellMixin,
     crash,
     do_nothing,

tests/utils.py

@@ -3,6 +3,7 @@
 import os
 import pathlib
 import platform
+import ssl
 import tempfile
 import time
 import unittest
@@ -17,6 +18,23 @@
 
 CERTIFICATE = bytes(pathlib.Path(__file__).with_name("test_localhost.pem"))
 
+CLIENT_CONTEXT = ssl.SSLContext(ssl.PROTOCOL_TLS_CLIENT)
+CLIENT_CONTEXT.load_verify_locations(CERTIFICATE)
+
+
+SERVER_CONTEXT = ssl.SSLContext(ssl.PROTOCOL_TLS_SERVER)
+SERVER_CONTEXT.load_cert_chain(CERTIFICATE)
+
+# Work around https://github.com/openssl/openssl/issues/7967
+
+# This bug causes connect() to hang in tests for the client. Including this
+# workaround acknowledges that the issue could happen outside of the test suite.
+
+# It shouldn't happen too often, or else OpenSSL 1.1.1 would be unusable. If it
+# happens, we can look for a library-level fix, but it won't be easy.
+
+SERVER_CONTEXT.num_tickets = 0
+
 
 DATE = email.utils.formatdate(usegmt=True)