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from scrapy.downloadermiddlewares.defaultheaders import DefaultHeadersMiddleware
from scrapy.http import Request
from scrapy.spiders import Spider
from scrapy.utils.python import to_bytes
from scrapy.utils.test import get_crawler
class TestDefaultHeadersMiddleware:
def get_defaults_spider_mw(self):
crawler = get_crawler(Spider)
spider = crawler._create_spider("foo")
defaults = {
to_bytes(k): [to_bytes(v)]
for k, v in crawler.settings.get("DEFAULT_REQUEST_HEADERS").items()
}
return defaults, spider, DefaultHeadersMiddleware.from_crawler(crawler)
def test_process_request(self):
defaults, spider, mw = self.get_defaults_spider_mw()
req = Request("http://www.scrapytest.org")
mw.process_request(req, spider)
assert req.headers == defaults
def test_update_headers(self):
defaults, spider, mw = self.get_defaults_spider_mw()
headers = {"Accept-Language": ["es"], "Test-Header": ["test"]}
bytes_headers = {b"Accept-Language": [b"es"], b"Test-Header": [b"test"]}
req = Request("http://www.scrapytest.org", headers=headers)
assert req.headers == bytes_headers
mw.process_request(req, spider)
defaults.update(bytes_headers)
assert req.headers == defaults
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