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import pickle
from queuelib.tests import test_queue as t
from scrapy.squeues import MarshalFifoDiskQueue, MarshalLifoDiskQueue, PickleFifoDiskQueue, PickleLifoDiskQueue
from scrapy.item import Item, Field
from scrapy.http import Request
from scrapy.loader import ItemLoader
class TestItem(Item):
name = Field()
def _test_procesor(x):
return x + x
class TestLoader(ItemLoader):
default_item_class = TestItem
name_out = staticmethod(_test_procesor)
def nonserializable_object_test(self):
try:
pickle.dumps(lambda x: x)
except Exception:
# Trigger Twisted bug #7989
import twisted.persisted.styles # NOQA
q = self.queue()
self.assertRaises(ValueError, q.push, lambda x: x)
else:
# Use a different unpickleable object
class A(object): pass
a = A()
a.__reduce__ = a.__reduce_ex__ = None
q = self.queue()
self.assertRaises(ValueError, q.push, a)
class MarshalFifoDiskQueueTest(t.FifoDiskQueueTest):
chunksize = 100000
def queue(self):
return MarshalFifoDiskQueue(self.qpath, chunksize=self.chunksize)
def test_serialize(self):
q = self.queue()
q.push('a')
q.push(123)
q.push({'a': 'dict'})
self.assertEqual(q.pop(), 'a')
self.assertEqual(q.pop(), 123)
self.assertEqual(q.pop(), {'a': 'dict'})
test_nonserializable_object = nonserializable_object_test
class ChunkSize1MarshalFifoDiskQueueTest(MarshalFifoDiskQueueTest):
chunksize = 1
class ChunkSize2MarshalFifoDiskQueueTest(MarshalFifoDiskQueueTest):
chunksize = 2
class ChunkSize3MarshalFifoDiskQueueTest(MarshalFifoDiskQueueTest):
chunksize = 3
class ChunkSize4MarshalFifoDiskQueueTest(MarshalFifoDiskQueueTest):
chunksize = 4
class PickleFifoDiskQueueTest(MarshalFifoDiskQueueTest):
chunksize = 100000
def queue(self):
return PickleFifoDiskQueue(self.qpath, chunksize=self.chunksize)
def test_serialize_item(self):
q = self.queue()
i = TestItem(name='foo')
q.push(i)
i2 = q.pop()
assert isinstance(i2, TestItem)
self.assertEqual(i, i2)
def test_serialize_loader(self):
q = self.queue()
l = TestLoader()
q.push(l)
l2 = q.pop()
assert isinstance(l2, TestLoader)
assert l2.default_item_class is TestItem
self.assertEqual(l2.name_out('x'), 'xx')
def test_serialize_request_recursive(self):
q = self.queue()
r = Request('http://www.example.com')
r.meta['request'] = r
q.push(r)
r2 = q.pop()
assert isinstance(r2, Request)
self.assertEqual(r.url, r2.url)
assert r2.meta['request'] is r2
class ChunkSize1PickleFifoDiskQueueTest(PickleFifoDiskQueueTest):
chunksize = 1
class ChunkSize2PickleFifoDiskQueueTest(PickleFifoDiskQueueTest):
chunksize = 2
class ChunkSize3PickleFifoDiskQueueTest(PickleFifoDiskQueueTest):
chunksize = 3
class ChunkSize4PickleFifoDiskQueueTest(PickleFifoDiskQueueTest):
chunksize = 4
class MarshalLifoDiskQueueTest(t.LifoDiskQueueTest):
def queue(self):
return MarshalLifoDiskQueue(self.qpath)
def test_serialize(self):
q = self.queue()
q.push('a')
q.push(123)
q.push({'a': 'dict'})
self.assertEqual(q.pop(), {'a': 'dict'})
self.assertEqual(q.pop(), 123)
self.assertEqual(q.pop(), 'a')
test_nonserializable_object = nonserializable_object_test
class PickleLifoDiskQueueTest(MarshalLifoDiskQueueTest):
def queue(self):
return PickleLifoDiskQueue(self.qpath)
def test_serialize_item(self):
q = self.queue()
i = TestItem(name='foo')
q.push(i)
i2 = q.pop()
assert isinstance(i2, TestItem)
self.assertEqual(i, i2)
def test_serialize_loader(self):
q = self.queue()
l = TestLoader()
q.push(l)
l2 = q.pop()
assert isinstance(l2, TestLoader)
assert l2.default_item_class is TestItem
self.assertEqual(l2.name_out('x'), 'xx')
def test_serialize_request_recursive(self):
q = self.queue()
r = Request('http://www.example.com')
r.meta['request'] = r
q.push(r)
r2 = q.pop()
assert isinstance(r2, Request)
self.assertEqual(r.url, r2.url)
assert r2.meta['request'] is r2
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