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import pickle
import sys
import pytest
from queuelib.tests import test_queue as t
from scrapy.http import Request
from scrapy.item import Field, Item
from scrapy.loader import ItemLoader
from scrapy.selector import Selector
from scrapy.squeues import (
_MarshalFifoSerializationDiskQueue,
_MarshalLifoSerializationDiskQueue,
_PickleFifoSerializationDiskQueue,
_PickleLifoSerializationDiskQueue,
)
class MyItem(Item):
name = Field()
def _test_procesor(x):
return x + x
class MyLoader(ItemLoader):
default_item_class = MyItem
name_out = staticmethod(_test_procesor)
def nonserializable_object_test(self):
q = self.queue()
with pytest.raises(
ValueError,
match="unmarshallable object|Can't (get|pickle) local object|Can't pickle .*: it's not found as",
):
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>")
with pytest.raises(
ValueError, match="unmarshallable object|can't pickle Selector objects"
):
q.push(sel)
class FifoDiskQueueTestMixin:
def test_serialize(self):
q = self.queue()
q.push("a")
q.push(123)
q.push({"a": "dict"})
assert q.pop() == "a"
assert q.pop() == 123
assert q.pop() == {"a": "dict"}
test_nonserializable_object = nonserializable_object_test
class MarshalFifoDiskQueueTest(t.FifoDiskQueueTest, FifoDiskQueueTestMixin):
chunksize = 100000
def queue(self):
return _MarshalFifoSerializationDiskQueue(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 _PickleFifoSerializationDiskQueue(self.qpath, chunksize=self.chunksize)
def test_serialize_item(self):
q = self.queue()
i = MyItem(name="foo")
q.push(i)
i2 = q.pop()
assert isinstance(i2, MyItem)
assert i == i2
def test_serialize_loader(self):
q = self.queue()
loader = MyLoader()
q.push(loader)
loader2 = q.pop()
assert isinstance(loader2, MyLoader)
assert loader2.default_item_class is MyItem
assert 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)
assert r.url == r2.url
assert r2.meta["request"] is r2
def test_non_pickable_object(self):
q = self.queue()
with pytest.raises(
ValueError,
match="Can't (get|pickle) local object|Can't pickle .*: it's not found as",
) as exc_info:
q.push(lambda x: x)
if hasattr(sys, "pypy_version_info"):
assert isinstance(exc_info.value.__context__, pickle.PicklingError)
else:
assert isinstance(exc_info.value.__context__, AttributeError)
sel = Selector(text="<html><body><p>some text</p></body></html>")
with pytest.raises(
ValueError, match="can't pickle Selector objects"
) as exc_info:
q.push(sel)
assert isinstance(exc_info.value.__context__, TypeError)
q.close()
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"})
assert q.pop() == {"a": "dict"}
assert q.pop() == 123
assert q.pop() == "a"
test_nonserializable_object = nonserializable_object_test
class MarshalLifoDiskQueueTest(t.LifoDiskQueueTest, LifoDiskQueueTestMixin):
def queue(self):
return _MarshalLifoSerializationDiskQueue(self.qpath)
class PickleLifoDiskQueueTest(t.LifoDiskQueueTest, LifoDiskQueueTestMixin):
def queue(self):
return _PickleLifoSerializationDiskQueue(self.qpath)
def test_serialize_item(self):
q = self.queue()
i = MyItem(name="foo")
q.push(i)
i2 = q.pop()
assert isinstance(i2, MyItem)
assert i == i2
def test_serialize_loader(self):
q = self.queue()
loader = MyLoader()
q.push(loader)
loader2 = q.pop()
assert isinstance(loader2, MyLoader)
assert loader2.default_item_class is MyItem
assert 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)
assert r.url == r2.url
assert r2.meta["request"] is r2
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