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from scrapy.downloadermiddlewares.useragent import UserAgentMiddleware
from scrapy.http import Request
from scrapy.spiders import Spider
from scrapy.utils.test import get_crawler
class TestUserAgentMiddleware:
def get_spider_and_mw(self, default_useragent):
crawler = get_crawler(Spider, {"USER_AGENT": default_useragent})
spider = crawler._create_spider("foo")
return spider, UserAgentMiddleware.from_crawler(crawler)
def test_default_agent(self):
spider, mw = self.get_spider_and_mw("default_useragent")
req = Request("http://scrapytest.org/")
assert mw.process_request(req, spider) is None
assert req.headers["User-Agent"] == b"default_useragent"
def test_remove_agent(self):
# settings USER_AGENT to None should remove the user agent
spider, mw = self.get_spider_and_mw("default_useragent")
spider.user_agent = None
mw.spider_opened(spider)
req = Request("http://scrapytest.org/")
assert mw.process_request(req, spider) is None
assert req.headers.get("User-Agent") is None
def test_spider_agent(self):
spider, mw = self.get_spider_and_mw("default_useragent")
spider.user_agent = "spider_useragent"
mw.spider_opened(spider)
req = Request("http://scrapytest.org/")
assert mw.process_request(req, spider) is None
assert req.headers["User-Agent"] == b"spider_useragent"
def test_header_agent(self):
spider, mw = self.get_spider_and_mw("default_useragent")
spider.user_agent = "spider_useragent"
mw.spider_opened(spider)
req = Request(
"http://scrapytest.org/", headers={"User-Agent": "header_useragent"}
)
assert mw.process_request(req, spider) is None
assert req.headers["User-Agent"] == b"header_useragent"
def test_no_agent(self):
spider, mw = self.get_spider_and_mw(None)
spider.user_agent = None
mw.spider_opened(spider)
req = Request("http://scrapytest.org/")
assert mw.process_request(req, spider) is None
assert "User-Agent" not in req.headers
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