mirror of https://github.com/scrapy/scrapy.git
58 lines
1.8 KiB
Python
58 lines
1.8 KiB
Python
from scrapy.signals import request_left_downloader
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from scrapy.spiders import Spider
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from scrapy.utils.test import get_crawler
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from tests.mockserver.http import MockServer
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from tests.utils.decorators import inline_callbacks_test
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class SignalCatcherSpider(Spider):
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name = "signal_catcher"
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def __init__(self, crawler, url, *args, **kwargs):
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super().__init__(*args, **kwargs)
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crawler.signals.connect(self.on_request_left, signal=request_left_downloader)
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self.caught_times = 0
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self.start_urls = [url]
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@classmethod
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def from_crawler(cls, crawler, *args, **kwargs):
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return cls(crawler, *args, **kwargs)
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def on_request_left(self, request, spider):
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self.caught_times += 1
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class TestCatching:
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@classmethod
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def setup_class(cls):
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cls.mockserver = MockServer()
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cls.mockserver.__enter__()
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@classmethod
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def teardown_class(cls):
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cls.mockserver.__exit__(None, None, None)
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@inline_callbacks_test
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def test_success(self):
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crawler = get_crawler(SignalCatcherSpider)
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yield crawler.crawl(self.mockserver.url("/status?n=200"))
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assert crawler.spider.caught_times == 1
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@inline_callbacks_test
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def test_timeout(self):
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crawler = get_crawler(SignalCatcherSpider, {"DOWNLOAD_TIMEOUT": 0.1})
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yield crawler.crawl(self.mockserver.url("/delay?n=0.2"))
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assert crawler.spider.caught_times == 1
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@inline_callbacks_test
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def test_disconnect(self):
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crawler = get_crawler(SignalCatcherSpider)
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yield crawler.crawl(self.mockserver.url("/drop"))
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assert crawler.spider.caught_times == 1
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@inline_callbacks_test
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def test_noconnect(self):
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crawler = get_crawler(SignalCatcherSpider)
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yield crawler.crawl("http://thereisdefinetelynosuchdomain.com")
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assert crawler.spider.caught_times == 1
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