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from scrapy.exceptions import NotConfigured
from scrapy.middleware import MiddlewareManager
from scrapy.utils.test import get_crawler
class M1:
def open_spider(self, spider):
pass
def close_spider(self, spider):
pass
def process(self, response, request, spider):
pass
class M2:
def open_spider(self, spider):
pass
def close_spider(self, spider):
pass
class M3:
def process(self, response, request, spider):
pass
class MOff:
def open_spider(self, spider):
pass
def close_spider(self, spider):
pass
def __init__(self):
raise NotConfigured("foo")
class MyMiddlewareManager(MiddlewareManager):
@classmethod
def _get_mwlist_from_settings(cls, settings):
return [M1, MOff, M3]
def _add_middleware(self, mw):
super()._add_middleware(mw)
if hasattr(mw, "process"):
self.methods["process"].append(mw.process)
class TestMiddlewareManager:
def test_init(self):
m1, m2, m3 = M1(), M2(), M3()
mwman = MyMiddlewareManager(m1, m2, m3)
assert list(mwman.methods["open_spider"]) == [m1.open_spider, m2.open_spider]
assert list(mwman.methods["close_spider"]) == [m2.close_spider, m1.close_spider]
assert list(mwman.methods["process"]) == [m1.process, m3.process]
def test_methods(self):
mwman = MyMiddlewareManager(M1(), M2(), M3())
assert [x.__self__.__class__ for x in mwman.methods["open_spider"]] == [M1, M2]
assert [x.__self__.__class__ for x in mwman.methods["close_spider"]] == [M2, M1]
assert [x.__self__.__class__ for x in mwman.methods["process"]] == [M1, M3]
def test_enabled(self):
m1, m2, m3 = M1(), M2(), M3()
mwman = MiddlewareManager(m1, m2, m3)
assert mwman.middlewares == (m1, m2, m3)
def test_enabled_from_settings(self):
crawler = get_crawler()
mwman = MyMiddlewareManager.from_crawler(crawler)
classes = [x.__class__ for x in mwman.middlewares]
assert classes == [M1, M3]
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