class SchedulerTest(TestCase):
def setUp(self):
self.server = redis.Redis(REDIS_HOST, REDIS_PORT)
self.key_prefix = 'scrapy_redis:tests:'
self.queue_key = self.key_prefix + '%(spider)s:requests'
self.dupefilter_key = self.key_prefix + '%(spider)s:dupefilter'
self.idle_before_close = 0
self.scheduler = Scheduler(self.server, False, self.queue_key,
SpiderQueue, self.dupefilter_key,
self.idle_before_close)
def tearDown(self):
for key in self.server.keys(self.key_prefix):
self.server.delete(key)
def test_scheduler(self):
# default no persist
self.assertFalse(self.scheduler.persist)
spider = Spider('myspider')
self.scheduler.open(spider)
self.assertEqual(len(self.scheduler), 0)
req = Request('http://example.com')
self.scheduler.enqueue_request(req)
self.assertTrue(self.scheduler.has_pending_requests())
self.assertEqual(len(self.scheduler), 1)
# dupefilter in action
self.scheduler.enqueue_request(req)
self.assertEqual(len(self.scheduler), 1)
out = self.scheduler.next_request()
self.assertEqual(out.url, req.url)
self.assertFalse(self.scheduler.has_pending_requests())
self.assertEqual(len(self.scheduler), 0)
self.scheduler.close('finish')
def test_scheduler_persistent(self):
messages = []
spider = Spider('myspider')
spider.log = lambda *args, **kwargs: messages.append([args, kwargs])
self.scheduler.persist = True
self.scheduler.open(spider)
self.assertEqual(messages, [])
self.scheduler.enqueue_request(Request('http://example.com/page1'))
self.scheduler.enqueue_request(Request('http://example.com/page2'))
self.assertTrue(self.scheduler.has_pending_requests())
self.scheduler.close('finish')
self.scheduler.open(spider)
self.assertEqual(messages, [
[('Resuming crawl (2 requests scheduled)',), {}],
])
self.assertEqual(len(self.scheduler), 2)
self.scheduler.persist = False
self.scheduler.close('finish')
self.assertEqual(len(self.scheduler), 0)
