def test_expires_with_date(self):
'''Uses the Date header when present.'''
response = mock.Mock(
headers={
'expires': 'Thu, 13 Oct 2016 15:50:54 GMT',
'date': 'Thu, 13 Oct 2016 15:49:54 GMT'
})
policy = ttl.HeaderWithDefaultPolicy(20, 10)
self.assertEqual(policy.ttl(response), 60)
def test_cache_control_precedence(self):
'''Cache control is used before expires.'''
response = mock.Mock(
headers={
'cache_control': 'max-age=30',
'expires': 'Thu, 13 Oct 2016 15:50:54 GMT',
'date': 'Thu, 13 Oct 2016 15:49:54 GMT'
})
policy = ttl.HeaderWithDefaultPolicy(20, 10)
self.assertEqual(policy.ttl(response), 30)
def test_expires_with_no_date(self):
'''Uses the host computer's date when the Date header is absent.'''
expires = 'Thu, 13 Oct 2016 15:50:54 GMT'
response = mock.Mock(headers={'expires': expires})
policy = ttl.HeaderWithDefaultPolicy(20, 10)
timestamp = ttl.parse_date(expires)
expected = 60
with mock.patch.object(ttl.time,
'time',
return_value=timestamp - expected):
self.assertEqual(policy.ttl(response), expected)
def test_multiple_cache_control(self):
'''Can walk through multiple cache control configs.'''
response = mock.Mock(headers={'cache_control': 'foo, max-age=15'})
policy = ttl.HeaderWithDefaultPolicy(20, 10)
self.assertEqual(policy.ttl(response), 15)
def test_default_for_malformed_maxage(self):
'''Returns the default when maxage cannot be parsed.'''
response = mock.Mock(headers={'cache_control': 'max-age=not-a-number'})
policy = ttl.HeaderWithDefaultPolicy(20, 10)
self.assertEqual(policy.ttl(response), 20)
def test_max_age(self):
'''Returns the parsed max-age.'''
response = mock.Mock(headers={'cache_control': 'max-age=15'})
policy = ttl.HeaderWithDefaultPolicy(20, 10)
self.assertEqual(policy.ttl(response), 15)
def test_no_cache(self):
'''Returns the minimum when no-cache present.'''
response = mock.Mock(headers={'cache_control': 'no-cache'})
policy = ttl.HeaderWithDefaultPolicy(20, 10)
self.assertEqual(policy.ttl(response), 10)
def test_must_revalidate(self):
'''Returns the minimum when must-revalidate present.'''
response = mock.Mock(headers={'cache_control': 'must-revalidate'})
policy = ttl.HeaderWithDefaultPolicy(20, 10)
self.assertEqual(policy.ttl(response), 10)
def test_malformed_expires(self):
'''Returns the default when the Expires header is malformed.'''
response = mock.Mock(headers={'expires': 'not parseable as a date'})
policy = ttl.HeaderWithDefaultPolicy(20, 10)
self.assertEqual(policy.ttl(response), 20)