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import pickle
import sys
from queuelib.tests import test_queue as t
from scrapy.squeues import (
MarshalFifoDiskQueueNonRequest as MarshalFifoDiskQueue,
MarshalLifoDiskQueueNonRequest as MarshalLifoDiskQueue,
PickleFifoDiskQueueNonRequest as PickleFifoDiskQueue,
PickleLifoDiskQueueNonRequest as PickleLifoDiskQueue
)
from scrapy.item import Item, Field
from scrapy.http import Request
from scrapy.loader import ItemLoader
from scrapy.selector import Selector
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):
q = self.queue()
self.assertRaises(ValueError, q.push, lambda x: x)
# Selectors should fail (lxml.html.HtmlElement objects can't be pickled)
sel = Selector(text='<html><body><p>some text</p></body></html>')
self.assertRaises(ValueError, q.push, sel)
class FifoDiskQueueTestMixin:
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 MarshalFifoDiskQueueTest(t.FifoDiskQueueTest, FifoDiskQueueTestMixin):
chunksize = 100000
def queue(self):
return MarshalFifoDiskQueue(self.qpath, chunksize=self.chunksize)
class ChunkSize1MarshalFifoDiskQueueTest(MarshalFifoDiskQueueTest):
chunksize = 1
class ChunkSize2MarshalFifoDiskQueueTest(MarshalFifoDiskQueueTest):
chunksize = 2
class ChunkSize3MarshalFifoDiskQueueTest(MarshalFifoDiskQueueTest):
chunksize = 3
class ChunkSize4MarshalFifoDiskQueueTest(MarshalFifoDiskQueueTest):
chunksize = 4
class PickleFifoDiskQueueTest(t.FifoDiskQueueTest, FifoDiskQueueTestMixin):
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()
loader = TestLoader()
q.push(loader)
loader2 = q.pop()
assert isinstance(loader2, TestLoader)
assert loader2.default_item_class is TestItem
self.assertEqual(loader2.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
def test_non_pickable_object(self):
q = self.queue()
try:
q.push(lambda x: x)
except ValueError as exc:
if hasattr(sys, "pypy_version_info"):
self.assertIsInstance(exc.__context__, pickle.PicklingError)
else:
self.assertIsInstance(exc.__context__, AttributeError)
sel = Selector(text='<html><body><p>some text</p></body></html>')
try:
q.push(sel)
except ValueError as exc:
self.assertIsInstance(exc.__context__, TypeError)
class ChunkSize1PickleFifoDiskQueueTest(PickleFifoDiskQueueTest):
chunksize = 1
class ChunkSize2PickleFifoDiskQueueTest(PickleFifoDiskQueueTest):
chunksize = 2
class ChunkSize3PickleFifoDiskQueueTest(PickleFifoDiskQueueTest):
chunksize = 3
class ChunkSize4PickleFifoDiskQueueTest(PickleFifoDiskQueueTest):
chunksize = 4
class LifoDiskQueueTestMixin:
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 MarshalLifoDiskQueueTest(t.LifoDiskQueueTest, LifoDiskQueueTestMixin):
def queue(self):
return MarshalLifoDiskQueue(self.qpath)
class PickleLifoDiskQueueTest(t.LifoDiskQueueTest, LifoDiskQueueTestMixin):
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()
loader = TestLoader()
q.push(loader)
loader2 = q.pop()
assert isinstance(loader2, TestLoader)
assert loader2.default_item_class is TestItem
self.assertEqual(loader2.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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