chore(tests): Remove validations for unsupported modules versions

tests/test_downloadermiddleware.py

@@ -1,13 +1,11 @@
 import asyncio
-from unittest import mock, SkipTest
+from unittest import mock
 
 from pytest import mark
-from twisted import version as twisted_version
 from twisted.internet import defer
 from twisted.internet.defer import Deferred
 from twisted.trial.unittest import TestCase
 from twisted.python.failure import Failure
-from twisted.python.versions import Version
 
 from scrapy.http import Request, Response
 from scrapy.spiders import Spider
@@ -218,16 +216,6 @@ class MiddlewareUsingCoro(ManagerTestCase):
     """Middlewares using asyncio coroutines should work"""
 
     def test_asyncdef(self):
-        if (
-            self.reactor_pytest == 'asyncio'
-            and twisted_version < Version('twisted', 18, 4, 0)
-        ):
-            raise SkipTest(
-                'Due to https://twistedmatrix.com/trac/ticket/9390, this test '
-                'hangs when using AsyncIO and Twisted versions lower than '
-                '18.4.0'
-            )
-
         resp = Response('http://example.com/index.html')
 
         class CoroMiddleware:
@@ -248,12 +236,6 @@ class MiddlewareUsingCoro(ManagerTestCase):
 
     @mark.only_asyncio()
     def test_asyncdef_asyncio(self):
-        if twisted_version < Version('twisted', 18, 4, 0):
-            raise SkipTest(
-                'Due to https://twistedmatrix.com/trac/ticket/9390, this test '
-                'hangs when using Twisted versions lower than 18.4.0'
-            )
-
         resp = Response('http://example.com/index.html')
 
         class CoroMiddleware:

tests/test_utils_signal.py

@@ -1,13 +1,10 @@
 import asyncio
-from unittest import SkipTest
 
 from pydispatch import dispatcher
 from pytest import mark
 from testfixtures import LogCapture
-from twisted import version as twisted_version
 from twisted.internet import defer, reactor
 from twisted.python.failure import Failure
-from twisted.python.versions import Version
 from twisted.trial import unittest
 
 from scrapy.utils.signal import send_catch_log, send_catch_log_deferred
@@ -81,16 +78,6 @@ class SendCatchLogDeferredAsyncDefTest(SendCatchLogDeferredTest):
         return "OK"
 
     def test_send_catch_log(self):
-        if (
-            self.reactor_pytest == 'asyncio'
-            and twisted_version < Version('twisted', 18, 4, 0)
-        ):
-            raise SkipTest(
-                'Due to https://twistedmatrix.com/trac/ticket/9390, this test '
-                'fails due to a timeout when using AsyncIO and Twisted '
-                'versions lower than 18.4.0'
-            )
-
         return super().test_send_catch_log()
 
 
@@ -104,13 +91,6 @@ class SendCatchLogDeferredAsyncioTest(SendCatchLogDeferredTest):
         return await get_from_asyncio_queue("OK")
 
     def test_send_catch_log(self):
-        if twisted_version < Version('twisted', 18, 4, 0):
-            raise SkipTest(
-                'Due to https://twistedmatrix.com/trac/ticket/9390, this test '
-                'fails due to a timeout when using Twisted versions lower '
-                'than 18.4.0'
-            )
-
         return super().test_send_catch_log()
 
 

tests/test_webclient.py

@@ -4,10 +4,7 @@ Tests borrowed from the twisted.web.client tests.
 """
 import os
 import shutil
-import sys
-from pkg_resources import parse_version
 
-import cryptography
 import OpenSSL.SSL
 from twisted.trial import unittest
 from twisted.web import server, static, util, resource
@@ -417,8 +414,6 @@ class WebClientCustomCiphersSSLTestCase(WebClientSSLTestCase):
         ).addCallback(self.assertEqual, to_bytes(s))
 
     def testPayloadDisabledCipher(self):
-        if sys.implementation.name == "pypy" and parse_version(cryptography.__version__) <= parse_version("2.3.1"):
-            self.skipTest("This test expects a failure, but the code does work in PyPy with cryptography<=2.3.1")
         s = "0123456789" * 10
         settings = Settings({'DOWNLOADER_CLIENT_TLS_CIPHERS': 'ECDHE-RSA-AES256-GCM-SHA384'})
         client_context_factory = create_instance(ScrapyClientContextFactory, settings=settings, crawler=None)