mirror of https://github.com/scrapy/scrapy.git
563 lines
21 KiB
Python
563 lines
21 KiB
Python
import logging
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import platform
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import subprocess
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import sys
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import warnings
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from pathlib import Path
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from pkg_resources import parse_version
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from pytest import mark, raises
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from twisted import version as twisted_version
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from twisted.internet import defer
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from twisted.python.versions import Version
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from twisted.trial import unittest
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from w3lib import __version__ as w3lib_version
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import scrapy
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from scrapy.crawler import Crawler, CrawlerProcess, CrawlerRunner
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from scrapy.exceptions import ScrapyDeprecationWarning
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from scrapy.extensions import telnet
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from scrapy.extensions.throttle import AutoThrottle
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from scrapy.settings import Settings, default_settings
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from scrapy.spiderloader import SpiderLoader
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from scrapy.utils.log import configure_logging, get_scrapy_root_handler
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from scrapy.utils.misc import load_object
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from scrapy.utils.spider import DefaultSpider
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from scrapy.utils.test import get_crawler, get_testenv
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from tests.mockserver import MockServer
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class BaseCrawlerTest(unittest.TestCase):
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def assertOptionIsDefault(self, settings, key):
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self.assertIsInstance(settings, Settings)
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self.assertEqual(settings[key], getattr(default_settings, key))
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class CrawlerTestCase(BaseCrawlerTest):
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def test_populate_spidercls_settings(self):
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spider_settings = {"TEST1": "spider", "TEST2": "spider"}
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project_settings = {"TEST1": "project", "TEST3": "project"}
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class CustomSettingsSpider(DefaultSpider):
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custom_settings = spider_settings
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settings = Settings()
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settings.setdict(project_settings, priority="project")
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with warnings.catch_warnings():
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warnings.simplefilter("ignore", ScrapyDeprecationWarning)
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crawler = Crawler(CustomSettingsSpider, settings)
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self.assertEqual(crawler.settings.get("TEST1"), "spider")
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self.assertEqual(crawler.settings.get("TEST2"), "spider")
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self.assertEqual(crawler.settings.get("TEST3"), "project")
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self.assertFalse(settings.frozen)
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self.assertTrue(crawler.settings.frozen)
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def test_crawler_accepts_dict(self):
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crawler = get_crawler(DefaultSpider, {"foo": "bar"})
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self.assertEqual(crawler.settings["foo"], "bar")
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self.assertOptionIsDefault(crawler.settings, "RETRY_ENABLED")
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def test_crawler_accepts_None(self):
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with warnings.catch_warnings():
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warnings.simplefilter("ignore", ScrapyDeprecationWarning)
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crawler = Crawler(DefaultSpider)
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self.assertOptionIsDefault(crawler.settings, "RETRY_ENABLED")
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def test_crawler_rejects_spider_objects(self):
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with raises(ValueError):
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Crawler(DefaultSpider())
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class SpiderSettingsTestCase(unittest.TestCase):
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def test_spider_custom_settings(self):
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class MySpider(scrapy.Spider):
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name = "spider"
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custom_settings = {"AUTOTHROTTLE_ENABLED": True}
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crawler = get_crawler(MySpider)
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enabled_exts = [e.__class__ for e in crawler.extensions.middlewares]
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self.assertIn(AutoThrottle, enabled_exts)
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class CrawlerLoggingTestCase(unittest.TestCase):
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def test_no_root_handler_installed(self):
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handler = get_scrapy_root_handler()
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if handler is not None:
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logging.root.removeHandler(handler)
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class MySpider(scrapy.Spider):
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name = "spider"
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get_crawler(MySpider)
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assert get_scrapy_root_handler() is None
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def test_spider_custom_settings_log_level(self):
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log_file = Path(self.mktemp())
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log_file.write_text("previous message\n", encoding="utf-8")
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class MySpider(scrapy.Spider):
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name = "spider"
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custom_settings = {
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"LOG_LEVEL": "INFO",
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"LOG_FILE": str(log_file),
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# settings to avoid extra warnings
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"REQUEST_FINGERPRINTER_IMPLEMENTATION": "2.7",
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"TELNETCONSOLE_ENABLED": telnet.TWISTED_CONCH_AVAILABLE,
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}
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configure_logging()
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self.assertEqual(get_scrapy_root_handler().level, logging.DEBUG)
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crawler = get_crawler(MySpider)
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self.assertEqual(get_scrapy_root_handler().level, logging.INFO)
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info_count = crawler.stats.get_value("log_count/INFO")
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logging.debug("debug message")
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logging.info("info message")
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logging.warning("warning message")
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logging.error("error message")
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logged = log_file.read_text(encoding="utf-8")
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self.assertIn("previous message", logged)
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self.assertNotIn("debug message", logged)
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self.assertIn("info message", logged)
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self.assertIn("warning message", logged)
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self.assertIn("error message", logged)
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self.assertEqual(crawler.stats.get_value("log_count/ERROR"), 1)
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self.assertEqual(crawler.stats.get_value("log_count/WARNING"), 1)
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self.assertEqual(crawler.stats.get_value("log_count/INFO") - info_count, 1)
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self.assertEqual(crawler.stats.get_value("log_count/DEBUG", 0), 0)
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def test_spider_custom_settings_log_append(self):
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log_file = Path(self.mktemp())
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log_file.write_text("previous message\n", encoding="utf-8")
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class MySpider(scrapy.Spider):
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name = "spider"
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custom_settings = {
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"LOG_FILE": str(log_file),
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"LOG_FILE_APPEND": False,
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# disable telnet if not available to avoid an extra warning
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"TELNETCONSOLE_ENABLED": telnet.TWISTED_CONCH_AVAILABLE,
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}
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configure_logging()
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get_crawler(MySpider)
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logging.debug("debug message")
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logged = log_file.read_text(encoding="utf-8")
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self.assertNotIn("previous message", logged)
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self.assertIn("debug message", logged)
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class SpiderLoaderWithWrongInterface:
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def unneeded_method(self):
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pass
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class CustomSpiderLoader(SpiderLoader):
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pass
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class CrawlerRunnerTestCase(BaseCrawlerTest):
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def test_spider_manager_verify_interface(self):
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settings = Settings(
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{
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"SPIDER_LOADER_CLASS": SpiderLoaderWithWrongInterface,
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}
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)
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with warnings.catch_warnings(record=True) as w:
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self.assertRaises(AttributeError, CrawlerRunner, settings)
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self.assertEqual(len(w), 1)
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self.assertIn("SPIDER_LOADER_CLASS", str(w[0].message))
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self.assertIn("scrapy.interfaces.ISpiderLoader", str(w[0].message))
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def test_crawler_runner_accepts_dict(self):
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runner = CrawlerRunner({"foo": "bar"})
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self.assertEqual(runner.settings["foo"], "bar")
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self.assertOptionIsDefault(runner.settings, "RETRY_ENABLED")
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def test_crawler_runner_accepts_None(self):
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runner = CrawlerRunner()
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self.assertOptionIsDefault(runner.settings, "RETRY_ENABLED")
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def test_deprecated_attribute_spiders(self):
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with warnings.catch_warnings(record=True) as w:
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runner = CrawlerRunner(Settings())
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spiders = runner.spiders
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self.assertEqual(len(w), 1)
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self.assertIn("CrawlerRunner.spiders", str(w[0].message))
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self.assertIn("CrawlerRunner.spider_loader", str(w[0].message))
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sl_cls = load_object(runner.settings["SPIDER_LOADER_CLASS"])
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self.assertIsInstance(spiders, sl_cls)
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class CrawlerProcessTest(BaseCrawlerTest):
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def test_crawler_process_accepts_dict(self):
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runner = CrawlerProcess({"foo": "bar"})
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self.assertEqual(runner.settings["foo"], "bar")
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self.assertOptionIsDefault(runner.settings, "RETRY_ENABLED")
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def test_crawler_process_accepts_None(self):
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runner = CrawlerProcess()
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self.assertOptionIsDefault(runner.settings, "RETRY_ENABLED")
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class ExceptionSpider(scrapy.Spider):
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name = "exception"
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@classmethod
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def from_crawler(cls, crawler, *args, **kwargs):
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raise ValueError("Exception in from_crawler method")
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class NoRequestsSpider(scrapy.Spider):
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name = "no_request"
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def start_requests(self):
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return []
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@mark.usefixtures("reactor_pytest")
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class CrawlerRunnerHasSpider(unittest.TestCase):
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def _runner(self):
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return CrawlerRunner({"REQUEST_FINGERPRINTER_IMPLEMENTATION": "2.7"})
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@defer.inlineCallbacks
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def test_crawler_runner_bootstrap_successful(self):
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runner = self._runner()
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yield runner.crawl(NoRequestsSpider)
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self.assertEqual(runner.bootstrap_failed, False)
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@defer.inlineCallbacks
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def test_crawler_runner_bootstrap_successful_for_several(self):
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runner = self._runner()
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yield runner.crawl(NoRequestsSpider)
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yield runner.crawl(NoRequestsSpider)
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self.assertEqual(runner.bootstrap_failed, False)
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@defer.inlineCallbacks
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def test_crawler_runner_bootstrap_failed(self):
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runner = self._runner()
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try:
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yield runner.crawl(ExceptionSpider)
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except ValueError:
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pass
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else:
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self.fail("Exception should be raised from spider")
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self.assertEqual(runner.bootstrap_failed, True)
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@defer.inlineCallbacks
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def test_crawler_runner_bootstrap_failed_for_several(self):
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runner = self._runner()
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try:
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yield runner.crawl(ExceptionSpider)
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except ValueError:
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pass
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else:
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self.fail("Exception should be raised from spider")
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yield runner.crawl(NoRequestsSpider)
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self.assertEqual(runner.bootstrap_failed, True)
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@defer.inlineCallbacks
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def test_crawler_runner_asyncio_enabled_true(self):
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if self.reactor_pytest == "asyncio":
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CrawlerRunner(
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settings={
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"TWISTED_REACTOR": "twisted.internet.asyncioreactor.AsyncioSelectorReactor",
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"REQUEST_FINGERPRINTER_IMPLEMENTATION": "2.7",
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}
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)
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else:
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msg = r"The installed reactor \(.*?\) does not match the requested one \(.*?\)"
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with self.assertRaisesRegex(Exception, msg):
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runner = CrawlerRunner(
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settings={
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"TWISTED_REACTOR": "twisted.internet.asyncioreactor.AsyncioSelectorReactor",
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"REQUEST_FINGERPRINTER_IMPLEMENTATION": "2.7",
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}
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)
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yield runner.crawl(NoRequestsSpider)
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class ScriptRunnerMixin:
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script_dir: Path
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def run_script(self, script_name: str, *script_args):
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script_path = self.script_dir / script_name
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args = [sys.executable, str(script_path)] + list(script_args)
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p = subprocess.Popen(
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args, env=get_testenv(), stdout=subprocess.PIPE, stderr=subprocess.PIPE
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)
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stdout, stderr = p.communicate()
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return stderr.decode("utf-8")
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class CrawlerProcessSubprocess(ScriptRunnerMixin, unittest.TestCase):
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script_dir = Path(__file__).parent.resolve() / "CrawlerProcess"
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def test_simple(self):
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log = self.run_script("simple.py")
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self.assertIn("Spider closed (finished)", log)
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self.assertNotIn(
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"Using reactor: twisted.internet.asyncioreactor.AsyncioSelectorReactor", log
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)
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def test_multi(self):
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log = self.run_script("multi.py")
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self.assertIn("Spider closed (finished)", log)
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self.assertNotIn(
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"Using reactor: twisted.internet.asyncioreactor.AsyncioSelectorReactor", log
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)
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self.assertNotIn("ReactorAlreadyInstalledError", log)
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def test_reactor_default(self):
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log = self.run_script("reactor_default.py")
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self.assertIn("Spider closed (finished)", log)
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self.assertNotIn(
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"Using reactor: twisted.internet.asyncioreactor.AsyncioSelectorReactor", log
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)
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self.assertNotIn("ReactorAlreadyInstalledError", log)
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def test_reactor_default_twisted_reactor_select(self):
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log = self.run_script("reactor_default_twisted_reactor_select.py")
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if platform.system() in ["Windows", "Darwin"]:
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# The goal of this test function is to test that, when a reactor is
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# installed (the default one here) and a different reactor is
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# configured (select here), an error raises.
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#
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# In Windows the default reactor is the select reactor, so that
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# error does not raise.
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#
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# If that ever becomes the case on more platforms (i.e. if Linux
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# also starts using the select reactor by default in a future
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# version of Twisted), then we will need to rethink this test.
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self.assertIn("Spider closed (finished)", log)
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else:
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self.assertNotIn("Spider closed (finished)", log)
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self.assertIn(
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(
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"does not match the requested one "
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"(twisted.internet.selectreactor.SelectReactor)"
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),
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log,
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)
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def test_reactor_select(self):
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log = self.run_script("reactor_select.py")
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self.assertIn("Spider closed (finished)", log)
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self.assertNotIn("ReactorAlreadyInstalledError", log)
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def test_reactor_select_twisted_reactor_select(self):
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log = self.run_script("reactor_select_twisted_reactor_select.py")
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self.assertIn("Spider closed (finished)", log)
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self.assertNotIn("ReactorAlreadyInstalledError", log)
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def test_reactor_select_subclass_twisted_reactor_select(self):
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log = self.run_script("reactor_select_subclass_twisted_reactor_select.py")
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self.assertNotIn("Spider closed (finished)", log)
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self.assertIn(
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(
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"does not match the requested one "
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"(twisted.internet.selectreactor.SelectReactor)"
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),
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log,
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)
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def test_asyncio_enabled_no_reactor(self):
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log = self.run_script("asyncio_enabled_no_reactor.py")
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self.assertIn("Spider closed (finished)", log)
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self.assertIn(
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"Using reactor: twisted.internet.asyncioreactor.AsyncioSelectorReactor", log
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)
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def test_asyncio_enabled_reactor(self):
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log = self.run_script("asyncio_enabled_reactor.py")
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self.assertIn("Spider closed (finished)", log)
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self.assertIn(
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"Using reactor: twisted.internet.asyncioreactor.AsyncioSelectorReactor", log
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)
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@mark.skipif(
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parse_version(w3lib_version) >= parse_version("2.0.0"),
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reason="w3lib 2.0.0 and later do not allow invalid domains.",
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)
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def test_ipv6_default_name_resolver(self):
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log = self.run_script("default_name_resolver.py")
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self.assertIn("Spider closed (finished)", log)
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self.assertIn(
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"'downloader/exception_type_count/twisted.internet.error.DNSLookupError': 1,",
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log,
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)
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self.assertIn(
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"twisted.internet.error.DNSLookupError: DNS lookup failed: no results for hostname lookup: ::1.",
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log,
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)
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def test_caching_hostname_resolver_ipv6(self):
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log = self.run_script("caching_hostname_resolver_ipv6.py")
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self.assertIn("Spider closed (finished)", log)
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self.assertNotIn("twisted.internet.error.DNSLookupError", log)
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def test_caching_hostname_resolver_finite_execution(self):
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with MockServer() as mock_server:
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http_address = mock_server.http_address.replace("0.0.0.0", "127.0.0.1")
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log = self.run_script("caching_hostname_resolver.py", http_address)
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self.assertIn("Spider closed (finished)", log)
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self.assertNotIn("ERROR: Error downloading", log)
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self.assertNotIn("TimeoutError", log)
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self.assertNotIn("twisted.internet.error.DNSLookupError", log)
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def test_twisted_reactor_select(self):
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log = self.run_script("twisted_reactor_select.py")
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self.assertIn("Spider closed (finished)", log)
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self.assertIn(
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"Using reactor: twisted.internet.selectreactor.SelectReactor", log
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)
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@mark.skipif(
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platform.system() == "Windows", reason="PollReactor is not supported on Windows"
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)
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def test_twisted_reactor_poll(self):
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log = self.run_script("twisted_reactor_poll.py")
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self.assertIn("Spider closed (finished)", log)
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self.assertIn("Using reactor: twisted.internet.pollreactor.PollReactor", log)
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def test_twisted_reactor_asyncio(self):
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log = self.run_script("twisted_reactor_asyncio.py")
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self.assertIn("Spider closed (finished)", log)
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self.assertIn(
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"Using reactor: twisted.internet.asyncioreactor.AsyncioSelectorReactor", log
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)
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def test_twisted_reactor_asyncio_custom_settings(self):
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log = self.run_script("twisted_reactor_custom_settings.py")
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self.assertIn("Spider closed (finished)", log)
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self.assertIn(
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"Using reactor: twisted.internet.asyncioreactor.AsyncioSelectorReactor", log
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)
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def test_twisted_reactor_asyncio_custom_settings_same(self):
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log = self.run_script("twisted_reactor_custom_settings_same.py")
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self.assertIn("Spider closed (finished)", log)
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self.assertIn(
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"Using reactor: twisted.internet.asyncioreactor.AsyncioSelectorReactor", log
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)
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def test_twisted_reactor_asyncio_custom_settings_conflict(self):
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log = self.run_script("twisted_reactor_custom_settings_conflict.py")
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self.assertIn(
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"Using reactor: twisted.internet.selectreactor.SelectReactor", log
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)
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self.assertIn(
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"(twisted.internet.selectreactor.SelectReactor) does not match the requested one",
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log,
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)
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@mark.skipif(
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sys.implementation.name == "pypy",
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reason="uvloop does not support pypy properly",
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)
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@mark.skipif(
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platform.system() == "Windows", reason="uvloop does not support Windows"
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)
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@mark.skipif(
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twisted_version == Version("twisted", 21, 2, 0),
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reason="https://twistedmatrix.com/trac/ticket/10106",
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)
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def test_custom_loop_asyncio(self):
|
|
log = self.run_script("asyncio_custom_loop.py")
|
|
self.assertIn("Spider closed (finished)", log)
|
|
self.assertIn(
|
|
"Using reactor: twisted.internet.asyncioreactor.AsyncioSelectorReactor", log
|
|
)
|
|
self.assertIn("Using asyncio event loop: uvloop.Loop", log)
|
|
|
|
@mark.skipif(
|
|
sys.implementation.name == "pypy",
|
|
reason="uvloop does not support pypy properly",
|
|
)
|
|
@mark.skipif(
|
|
platform.system() == "Windows", reason="uvloop does not support Windows"
|
|
)
|
|
@mark.skipif(
|
|
twisted_version == Version("twisted", 21, 2, 0),
|
|
reason="https://twistedmatrix.com/trac/ticket/10106",
|
|
)
|
|
def test_custom_loop_asyncio_deferred_signal(self):
|
|
log = self.run_script("asyncio_deferred_signal.py", "uvloop.Loop")
|
|
self.assertIn("Spider closed (finished)", log)
|
|
self.assertIn(
|
|
"Using reactor: twisted.internet.asyncioreactor.AsyncioSelectorReactor", log
|
|
)
|
|
self.assertIn("Using asyncio event loop: uvloop.Loop", log)
|
|
self.assertIn("async pipeline opened!", log)
|
|
|
|
@mark.skipif(
|
|
sys.implementation.name == "pypy",
|
|
reason="uvloop does not support pypy properly",
|
|
)
|
|
@mark.skipif(
|
|
platform.system() == "Windows", reason="uvloop does not support Windows"
|
|
)
|
|
@mark.skipif(
|
|
twisted_version == Version("twisted", 21, 2, 0),
|
|
reason="https://twistedmatrix.com/trac/ticket/10106",
|
|
)
|
|
def test_asyncio_enabled_reactor_same_loop(self):
|
|
log = self.run_script("asyncio_enabled_reactor_same_loop.py")
|
|
self.assertIn("Spider closed (finished)", log)
|
|
self.assertIn(
|
|
"Using reactor: twisted.internet.asyncioreactor.AsyncioSelectorReactor", log
|
|
)
|
|
self.assertIn("Using asyncio event loop: uvloop.Loop", log)
|
|
|
|
@mark.skipif(
|
|
sys.implementation.name == "pypy",
|
|
reason="uvloop does not support pypy properly",
|
|
)
|
|
@mark.skipif(
|
|
platform.system() == "Windows", reason="uvloop does not support Windows"
|
|
)
|
|
@mark.skipif(
|
|
twisted_version == Version("twisted", 21, 2, 0),
|
|
reason="https://twistedmatrix.com/trac/ticket/10106",
|
|
)
|
|
def test_asyncio_enabled_reactor_different_loop(self):
|
|
log = self.run_script("asyncio_enabled_reactor_different_loop.py")
|
|
self.assertNotIn("Spider closed (finished)", log)
|
|
self.assertIn(
|
|
(
|
|
"does not match the one specified in the ASYNCIO_EVENT_LOOP "
|
|
"setting (uvloop.Loop)"
|
|
),
|
|
log,
|
|
)
|
|
|
|
def test_default_loop_asyncio_deferred_signal(self):
|
|
log = self.run_script("asyncio_deferred_signal.py")
|
|
self.assertIn("Spider closed (finished)", log)
|
|
self.assertIn(
|
|
"Using reactor: twisted.internet.asyncioreactor.AsyncioSelectorReactor", log
|
|
)
|
|
self.assertNotIn("Using asyncio event loop: uvloop.Loop", log)
|
|
self.assertIn("async pipeline opened!", log)
|
|
|
|
|
|
class CrawlerRunnerSubprocess(ScriptRunnerMixin, unittest.TestCase):
|
|
script_dir = Path(__file__).parent.resolve() / "CrawlerRunner"
|
|
|
|
def test_response_ip_address(self):
|
|
log = self.run_script("ip_address.py")
|
|
self.assertIn("INFO: Spider closed (finished)", log)
|
|
self.assertIn("INFO: Host: not.a.real.domain", log)
|
|
self.assertIn("INFO: Type: <class 'ipaddress.IPv4Address'>", log)
|
|
self.assertIn("INFO: IP address: 127.0.0.1", log)
|