mirror of https://github.com/scrapy/scrapy.git
110 lines
3.0 KiB
Python
110 lines
3.0 KiB
Python
from __future__ import annotations
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from typing import TYPE_CHECKING
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import pytest
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from scrapy import Spider
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from scrapy.exceptions import NotConfigured, ScrapyDeprecationWarning
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from scrapy.middleware import MiddlewareManager
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from scrapy.utils.test import get_crawler
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if TYPE_CHECKING:
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from scrapy.crawler import Crawler
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class M1:
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def open_spider(self, spider):
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pass
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def close_spider(self, spider):
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pass
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def process(self, response, request):
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pass
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class M2:
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def open_spider(self, spider):
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pass
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def close_spider(self, spider):
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pass
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class M3:
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def process(self, response, request):
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pass
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class MOff:
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def open_spider(self, spider):
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pass
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def close_spider(self, spider):
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pass
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def __init__(self):
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raise NotConfigured("foo")
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class MyMiddlewareManager(MiddlewareManager):
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component_name = "my"
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@classmethod
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def _get_mwlist_from_settings(cls, settings):
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return [M1, MOff, M3]
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def _add_middleware(self, mw):
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if hasattr(mw, "open_spider"):
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self.methods["open_spider"].append(mw.open_spider)
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if hasattr(mw, "close_spider"):
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self.methods["close_spider"].appendleft(mw.close_spider)
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if hasattr(mw, "process"):
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self.methods["process"].append(mw.process)
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@pytest.fixture
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def crawler() -> Crawler:
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return get_crawler(Spider)
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def test_init(crawler: Crawler) -> None:
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m1, m2, m3 = M1(), M2(), M3()
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mwman = MyMiddlewareManager(m1, m2, m3, crawler=crawler)
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assert list(mwman.methods["open_spider"]) == [m1.open_spider, m2.open_spider]
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assert list(mwman.methods["close_spider"]) == [m2.close_spider, m1.close_spider]
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assert list(mwman.methods["process"]) == [m1.process, m3.process]
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assert mwman.crawler == crawler
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def test_methods(crawler: Crawler) -> None:
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mwman = MyMiddlewareManager(M1(), M2(), M3(), crawler=crawler)
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assert [x.__self__.__class__ for x in mwman.methods["open_spider"]] == [M1, M2] # type: ignore[union-attr]
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assert [x.__self__.__class__ for x in mwman.methods["close_spider"]] == [M2, M1] # type: ignore[union-attr]
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assert [x.__self__.__class__ for x in mwman.methods["process"]] == [M1, M3] # type: ignore[union-attr]
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def test_enabled(crawler: Crawler) -> None:
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m1, m2, m3 = M1(), M2(), M3()
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mwman = MyMiddlewareManager(m1, m2, m3, crawler=crawler)
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assert mwman.middlewares == (m1, m2, m3)
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def test_enabled_from_settings(crawler: Crawler) -> None:
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crawler = get_crawler()
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mwman = MyMiddlewareManager.from_crawler(crawler)
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classes = [x.__class__ for x in mwman.middlewares]
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assert classes == [M1, M3]
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assert mwman.crawler == crawler
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def test_no_crawler() -> None:
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m1, m2, m3 = M1(), M2(), M3()
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with pytest.warns(
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ScrapyDeprecationWarning, match="was called without the crawler argument"
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):
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mwman = MyMiddlewareManager(m1, m2, m3)
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assert mwman.middlewares == (m1, m2, m3)
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assert mwman.crawler is None
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