openstack/swift
Code Issues Proposed changes

Use real mocking in unit tests test_cname_lookup

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Replacing function without mocking creates weird behaviors as the results
of the tests sometimes depends on the order of the execution. Use real
mocking to avoid such behaviors.

Example: using real mock showed that test test_host_is_storage_domain was
wrong because it was not "reseting" the lookup_cname function at the
beginning of the test.

Change-Id: Ibc60697c9c850e6e3a108f0d906e8906c3f53ced
This commit is contained in:
Romain LE DISEZ 2017-02-18 10:38:02 +01:00
parent b522edf96d
commit 110d7856de
1 changed files with 19 additions and 43 deletions
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62
test/unit/common/middleware/test_cname_lookup.py
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@ -40,9 +40,6 @@ def start_response(*args):
pass
original_lookup = cname_lookup.lookup_cname
class TestCNAMELookup(unittest.TestCase):
def setUp(self):
@ -52,8 +49,6 @@ class TestCNAMELookup(unittest.TestCase):
{'lookup_depth': 2})
def test_pass_ip_addresses(self):
cname_lookup.lookup_cname = original_lookup
req = Request.blank('/', environ={'REQUEST_METHOD': 'GET'},
headers={'Host': '10.134.23.198'})
resp = self.app(req.environ, start_response)
@ -64,12 +59,9 @@ class TestCNAMELookup(unittest.TestCase):
resp = self.app(req.environ, start_response)
self.assertEqual(resp, 'FAKE APP')
@mock.patch('swift.common.middleware.cname_lookup.lookup_cname',
new=lambda d: (0, d))
def test_passthrough(self):
def my_lookup(d):
return 0, d
cname_lookup.lookup_cname = my_lookup
req = Request.blank('/', environ={'REQUEST_METHOD': 'GET'},
headers={'Host': 'foo.example.com'})
resp = self.app(req.environ, start_response)
@ -84,14 +76,11 @@ class TestCNAMELookup(unittest.TestCase):
resp = self.app(req.environ, start_response)
self.assertEqual(resp, 'FAKE APP')
@mock.patch('swift.common.middleware.cname_lookup.lookup_cname',
new=lambda d: (0, '%s.example.com' % d))
def test_good_lookup(self):
req = Request.blank('/', environ={'REQUEST_METHOD': 'GET'},
headers={'Host': 'mysite.com'})
def my_lookup(d):
return 0, '%s.example.com' % d
cname_lookup.lookup_cname = my_lookup
resp = self.app(req.environ, start_response)
self.assertEqual(resp, 'FAKE APP')
req = Request.blank('/', environ={'REQUEST_METHOD': 'GET'},
@ -116,40 +105,33 @@ class TestCNAMELookup(unittest.TestCase):
elif d == 'level2.foo.com':
site = 'bar.example.com'
return 0, site
cname_lookup.lookup_cname = my_lookup
resp = self.app(req.environ, start_response)
self.assertEqual(resp, ['CNAME lookup failed after 2 tries'])
with mock.patch('swift.common.middleware.cname_lookup.lookup_cname',
new=my_lookup):
resp = self.app(req.environ, start_response)
self.assertEqual(resp, ['CNAME lookup failed after 2 tries'])
@mock.patch('swift.common.middleware.cname_lookup.lookup_cname',
new=lambda d: (0, 'some.invalid.site.com'))
def test_lookup_chain_bad_target(self):
req = Request.blank('/', environ={'REQUEST_METHOD': 'GET'},
headers={'Host': 'mysite.com'})
def my_lookup(d):
return 0, 'some.invalid.site.com'
cname_lookup.lookup_cname = my_lookup
resp = self.app(req.environ, start_response)
self.assertEqual(resp,
['CNAME lookup failed to resolve to a valid domain'])
@mock.patch('swift.common.middleware.cname_lookup.lookup_cname',
new=lambda d: (0, None))
def test_something_weird(self):
req = Request.blank('/', environ={'REQUEST_METHOD': 'GET'},
headers={'Host': 'mysite.com'})
def my_lookup(d):
return 0, None
cname_lookup.lookup_cname = my_lookup
resp = self.app(req.environ, start_response)
self.assertEqual(resp,
['CNAME lookup failed to resolve to a valid domain'])
@mock.patch('swift.common.middleware.cname_lookup.lookup_cname',
new=lambda d: (0, '%s.example.com' % d))
def test_with_memcache(self):
def my_lookup(d):
return 0, '%s.example.com' % d
cname_lookup.lookup_cname = my_lookup
class memcache_stub(object):
def __init__(self):
self.cache = {}
@ -245,29 +227,23 @@ class TestCNAMELookup(unittest.TestCase):
self.assertEqual(m.call_count, 2)
self.assertFalse('cname-mysite5.com' in memcache.cache)
@mock.patch('swift.common.middleware.cname_lookup.lookup_cname',
new=lambda d: (0, 'c.aexample.com'))
def test_cname_matching_ending_not_domain(self):
req = Request.blank('/', environ={'REQUEST_METHOD': 'GET'},
headers={'Host': 'foo.com'})
def my_lookup(d):
return 0, 'c.aexample.com'
cname_lookup.lookup_cname = my_lookup
resp = self.app(req.environ, start_response)
self.assertEqual(resp,
['CNAME lookup failed to resolve to a valid domain'])
@mock.patch('swift.common.middleware.cname_lookup.lookup_cname',
new=lambda d: (0, None))
def test_cname_configured_with_empty_storage_domain(self):
app = cname_lookup.CNAMELookupMiddleware(FakeApp(),
{'storage_domain': '',
'lookup_depth': 2})
req = Request.blank('/', environ={'REQUEST_METHOD': 'GET'},
headers={'Host': 'c.a.example.com'})
def my_lookup(d):
return 0, None
cname_lookup.lookup_cname = my_lookup
resp = app(req.environ, start_response)
self.assertEqual(resp, 'FAKE APP')
@ -324,7 +300,7 @@ class TestCNAMELookup(unittest.TestCase):
headers={'Host': host})
return app(req.environ, start_response)
bad_domain = ['CNAME lookup failed after 2 tries']
bad_domain = ['CNAME lookup failed to resolve to a valid domain']
resp = do_test('c.badtest.com')
self.assertEqual(resp, bad_domain)