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Issue #23788: Merge redundant test_bad_address() into test_urllibnet 

In Python 2, these were duplicated; one for urllib.urlopen() and one for
urllib2.urlopen(). The test_urllibnet version has a better precondition to
avoid false failures with bad DNS, and the test_urllib2_localnet version had
a more up-to-date comment and domain name.
This commit is contained in:
Martin Panter 2015-12-16 04:36:20 +00:00
parent e319ab01ce
commit a7f9933efa
2 changed files with 20 additions and 35 deletions
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29
Lib/test/test_urllib2_localnet.py
View File

@ -626,35 +626,6 @@ class TestUrlopen(unittest.TestCase):
url = open_url.geturl()
self.assertEqual(url, "http://localhost:%s" % handler.port)
def test_bad_address(self):
# Make sure proper exception is raised when connecting to a bogus
# address.
# as indicated by the comment below, this might fail with some ISP,
# so we run the test only when -unetwork/-uall is specified to
# mitigate the problem a bit (see #17564)
support.requires('network')
self.assertRaises(OSError,
# Given that both VeriSign and various ISPs have in
# the past or are presently hijacking various invalid
# domain name requests in an attempt to boost traffic
# to their own sites, finding a domain name to use
# for this test is difficult. RFC2606 leads one to
# believe that '.invalid' should work, but experience
# seemed to indicate otherwise. Single character
# TLDs are likely to remain invalid, so this seems to
# be the best choice. The trailing '.' prevents a
# related problem: The normal DNS resolver appends
# the domain names from the search path if there is
# no '.' the end and, and if one of those domains
# implements a '*' rule a result is returned.
# However, none of this will prevent the test from
# failing if the ISP hijacks all invalid domain
# requests. The real solution would be to be able to
# parameterize the framework with a mock resolver.
urllib.request.urlopen,
"http://sadflkjsasf.i.nvali.d./")
def test_iteration(self):
expected_response = b"pycon 2008..."
handler = self.start_server([(200, [], expected_response)])

26
Lib/test/test_urllibnet.py
View File

@ -113,7 +113,25 @@ class urlopenNetworkTests(unittest.TestCase):
def test_bad_address(self):
# Make sure proper exception is raised when connecting to a bogus
# address.
bogus_domain = "sadflkjsasf.i.nvali.d"
# Given that both VeriSign and various ISPs have in
# the past or are presently hijacking various invalid
# domain name requests in an attempt to boost traffic
# to their own sites, finding a domain name to use
# for this test is difficult. RFC2606 leads one to
# believe that '.invalid' should work, but experience
# seemed to indicate otherwise. Single character
# TLDs are likely to remain invalid, so this seems to
# be the best choice. The trailing '.' prevents a
# related problem: The normal DNS resolver appends
# the domain names from the search path if there is
# no '.' the end and, and if one of those domains
# implements a '*' rule a result is returned.
# However, none of this will prevent the test from
# failing if the ISP hijacks all invalid domain
# requests. The real solution would be to be able to
# parameterize the framework with a mock resolver.
bogus_domain = "sadflkjsasf.i.nvali.d."
try:
socket.gethostbyname(bogus_domain)
except OSError:
@ -128,11 +146,7 @@ class urlopenNetworkTests(unittest.TestCase):
'can be caused by a broken DNS server '
'(e.g. returns 404 or hijacks page)')
with self.assertRaises(OSError, msg=failure_explanation):
# SF patch 809915: In Sep 2003, VeriSign started highjacking
# invalid .com and .net addresses to boost traffic to their own
# site. This test started failing then. One hopes the .invalid
# domain will be spared to serve its defined purpose.
urllib.request.urlopen("http://sadflkjsasf.i.nvali.d/")
urllib.request.urlopen("http://{}/".format(bogus_domain))
class urlretrieveNetworkTests(unittest.TestCase):