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test_lister.py
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# Copyright (C) 2019 the Software Heritage developers
# License: GNU General Public License version 3, or any later version
# See top-level LICENSE file for more information
import abc
import time
from unittest import TestCase
from unittest.mock import Mock, patch
import requests_mock
from sqlalchemy import create_engine
from swh.lister.core.abstractattribute import AbstractAttribute
from swh.lister.tests.test_utils import init_db
def noop(*args, **kwargs):
pass
class HttpListerTesterBase(abc.ABC):
"""Testing base class for listers.
This contains methods for both :class:`HttpSimpleListerTester` and
:class:`HttpListerTester`.
See :class:`swh.lister.gitlab.tests.test_lister` for an example of how
to customize for a specific listing service.
"""
Lister = AbstractAttribute('The lister class to test')
lister_subdir = AbstractAttribute('bitbucket, github, etc.')
good_api_response_file = AbstractAttribute('Example good response body')
LISTER_NAME = 'fake-lister'
# May need to override this if the headers are used for something
def response_headers(self, request):
return {}
# May need to override this if the server uses non-standard rate limiting
# method.
# Please keep the requested retry delay reasonably low.
def mock_rate_quota(self, n, request, context):
self.rate_limit += 1
context.status_code = 429
context.headers['Retry-After'] = '1'
return '{"error":"dummy"}'
def __init__(self, *args, **kwargs):
super().__init__(*args, **kwargs)
self.rate_limit = 1
self.response = None
self.fl = None
self.helper = None
if self.__class__ != HttpListerTesterBase:
self.run = TestCase.run.__get__(self, self.__class__)
else:
self.run = noop
def mock_limit_n_response(self, n, request, context):
self.fl.reset_backoff()
if self.rate_limit <= n:
return self.mock_rate_quota(n, request, context)
else:
return self.mock_response(request, context)
def mock_limit_twice_response(self, request, context):
return self.mock_limit_n_response(2, request, context)
def get_api_response(self, identifier):
fl = self.get_fl()
if self.response is None:
self.response = fl.safely_issue_request(identifier)
return self.response
def get_fl(self, override_config=None):
"""Retrieve an instance of fake lister (fl).
"""
if override_config or self.fl is None:
self.fl = self.Lister(url='https://fakeurl',
override_config=override_config)
self.fl.INITIAL_BACKOFF = 1
self.fl.reset_backoff()
return self.fl
def disable_scheduler(self, fl):
fl.schedule_missing_tasks = Mock(return_value=None)
def disable_db(self, fl):
fl.winnow_models = Mock(return_value=[])
fl.db_inject_repo = Mock(return_value=fl.MODEL())
fl.disable_deleted_repo_tasks = Mock(return_value=None)
def init_db(self, db, model):
engine = create_engine(db.url())
model.metadata.create_all(engine)
@requests_mock.Mocker()
def test_is_within_bounds(self, http_mocker):
fl = self.get_fl()
self.assertFalse(fl.is_within_bounds(1, 2, 3))
self.assertTrue(fl.is_within_bounds(2, 1, 3))
self.assertTrue(fl.is_within_bounds(1, 1, 1))
self.assertTrue(fl.is_within_bounds(1, None, None))
self.assertTrue(fl.is_within_bounds(1, None, 2))
self.assertTrue(fl.is_within_bounds(1, 0, None))
self.assertTrue(fl.is_within_bounds("b", "a", "c"))
self.assertFalse(fl.is_within_bounds("a", "b", "c"))
self.assertTrue(fl.is_within_bounds("a", None, "c"))
self.assertTrue(fl.is_within_bounds("a", None, None))
self.assertTrue(fl.is_within_bounds("b", "a", None))
self.assertFalse(fl.is_within_bounds("a", "b", None))
self.assertTrue(fl.is_within_bounds("aa:02", "aa:01", "aa:03"))
self.assertFalse(fl.is_within_bounds("aa:12", None, "aa:03"))
with self.assertRaises(TypeError):
fl.is_within_bounds(1.0, "b", None)
with self.assertRaises(TypeError):
fl.is_within_bounds("A:B", "A::B", None)
class HttpListerTester(HttpListerTesterBase, abc.ABC):
"""Base testing class for subclass of
:class:`swh.lister.core.indexing_lister.IndexingHttpLister`
See :class:`swh.lister.github.tests.test_gh_lister` for an example of how
to customize for a specific listing service.
"""
last_index = AbstractAttribute('Last index in good_api_response')
first_index = AbstractAttribute('First index in good_api_response')
bad_api_response_file = AbstractAttribute('Example bad response body')
entries_per_page = AbstractAttribute('Number of results in good response')
test_re = AbstractAttribute('Compiled regex matching the server url. Must'
' capture the index value.')
convert_type = str
"""static method used to convert the "request_index" to its right type (for
indexing listers for example, this is in accordance with the model's
"indexable" column).
"""
def mock_response(self, request, context):
self.fl.reset_backoff()
self.rate_limit = 1
context.status_code = 200
custom_headers = self.response_headers(request)
context.headers.update(custom_headers)
req_index = self.request_index(request)
if req_index == self.first_index:
response_file = self.good_api_response_file
else:
response_file = self.bad_api_response_file
with open('swh/lister/%s/tests/%s' % (self.lister_subdir,
response_file),
'r', encoding='utf-8') as r:
return r.read()
def request_index(self, request):
m = self.test_re.search(request.path_url)
if m and (len(m.groups()) > 0):
return self.convert_type(m.group(1))
@requests_mock.Mocker()
def test_fetch_multiple_pages_yesdb(self, http_mocker):
http_mocker.get(self.test_re, text=self.mock_response)
db = init_db()
fl = self.get_fl(override_config={
'lister': {
'cls': 'local',
'args': {'db': db.url()}
}
})
self.init_db(db, fl.MODEL)
self.disable_scheduler(fl)
fl.run(min_bound=self.first_index)
self.assertEqual(fl.db_last_index(), self.last_index)
partitions = fl.db_partition_indices(5)
self.assertGreater(len(partitions), 0)
for k in partitions:
self.assertLessEqual(len(k), 5)
self.assertGreater(len(k), 0)
@requests_mock.Mocker()
def test_fetch_none_nodb(self, http_mocker):
http_mocker.get(self.test_re, text=self.mock_response)
fl = self.get_fl()
self.disable_scheduler(fl)
self.disable_db(fl)
fl.run(min_bound=1, max_bound=1) # stores no results
# FIXME: Determine what this method tries to test and add checks to
# actually test
@requests_mock.Mocker()
def test_fetch_one_nodb(self, http_mocker):
http_mocker.get(self.test_re, text=self.mock_response)
fl = self.get_fl()
self.disable_scheduler(fl)
self.disable_db(fl)
fl.run(min_bound=self.first_index, max_bound=self.first_index)
# FIXME: Determine what this method tries to test and add checks to
# actually test
@requests_mock.Mocker()
def test_fetch_multiple_pages_nodb(self, http_mocker):
http_mocker.get(self.test_re, text=self.mock_response)
fl = self.get_fl()
self.disable_scheduler(fl)
self.disable_db(fl)
fl.run(min_bound=self.first_index)
# FIXME: Determine what this method tries to test and add checks to
# actually test
@requests_mock.Mocker()
def test_repos_list(self, http_mocker):
"""Test the number of repos listed by the lister
"""
http_mocker.get(self.test_re, text=self.mock_response)
li = self.get_fl().transport_response_simplified(
self.get_api_response(self.first_index)
)
self.assertIsInstance(li, list)
self.assertEqual(len(li), self.entries_per_page)
@requests_mock.Mocker()
def test_model_map(self, http_mocker):
"""Check if all the keys of model are present in the model created by
the `transport_response_simplified`
"""
http_mocker.get(self.test_re, text=self.mock_response)
fl = self.get_fl()
li = fl.transport_response_simplified(
self.get_api_response(self.first_index))
di = li[0]
self.assertIsInstance(di, dict)
pubs = [k for k in vars(fl.MODEL).keys() if not k.startswith('_')]
for k in pubs:
if k not in ['last_seen', 'task_id', 'id']:
self.assertIn(k, di)
@requests_mock.Mocker()
def test_api_request(self, http_mocker):
"""Test API request for rate limit handling
"""
http_mocker.get(self.test_re, text=self.mock_limit_twice_response)
with patch.object(time, 'sleep', wraps=time.sleep) as sleepmock:
self.get_api_response(self.first_index)
self.assertEqual(sleepmock.call_count, 2)
class HttpSimpleListerTester(HttpListerTesterBase, abc.ABC):
"""Base testing class for subclass of
:class:`swh.lister.core.simple)_lister.SimpleLister`
See :class:`swh.lister.pypi.tests.test_lister` for an example of how
to customize for a specific listing service.
"""
entries = AbstractAttribute('Number of results in good response')
PAGE = AbstractAttribute("The server api's unique page to retrieve and "
"parse for information")
def get_fl(self, override_config=None):
"""Retrieve an instance of fake lister (fl).
"""
if override_config or self.fl is None:
self.fl = self.Lister(
override_config=override_config)
self.fl.INITIAL_BACKOFF = 1
self.fl.reset_backoff()
return self.fl
def mock_response(self, request, context):
self.fl.reset_backoff()
self.rate_limit = 1
context.status_code = 200
custom_headers = self.response_headers(request)
context.headers.update(custom_headers)
response_file = self.good_api_response_file
with open('swh/lister/%s/tests/%s' % (self.lister_subdir,
response_file),
'r', encoding='utf-8') as r:
return r.read()
@requests_mock.Mocker()
def test_api_request(self, http_mocker):
"""Test API request for rate limit handling
"""
http_mocker.get(self.PAGE, text=self.mock_limit_twice_response)
with patch.object(time, 'sleep', wraps=time.sleep) as sleepmock:
self.get_api_response(0)
self.assertEqual(sleepmock.call_count, 2)
@requests_mock.Mocker()
def test_model_map(self, http_mocker):
"""Check if all the keys of model are present in the model created by
the `transport_response_simplified`
"""
http_mocker.get(self.PAGE, text=self.mock_response)
fl = self.get_fl()
li = fl.list_packages(self.get_api_response(0))
li = fl.transport_response_simplified(li)
di = li[0]
self.assertIsInstance(di, dict)
pubs = [k for k in vars(fl.MODEL).keys() if not k.startswith('_')]
for k in pubs:
if k not in ['last_seen', 'task_id', 'id']:
self.assertIn(k, di)
@requests_mock.Mocker()
def test_repos_list(self, http_mocker):
"""Test the number of packages listed by the lister
"""
http_mocker.get(self.PAGE, text=self.mock_response)
li = self.get_fl().list_packages(
self.get_api_response(0)
)
self.assertIsInstance(li, list)
self.assertEqual(len(li), self.entries)

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