Clean up test_download_gzip_response

[Gallaecio]

The test is currently skipped due to some Python-2-only code. We should instead remove that code.

scrapy/tests/test_downloader_handlers.py

Lines 729 to 754 in 42b3a3a

	@defer.inlineCallbacks
	def test_download_gzip_response(self):
	crawler = get_crawler(SingleRequestSpider, self.settings_dict)
	body = b"1" * 100 # PayloadResource requires body length to be 100
	request = Request(
	self.mockserver.url("/payload"),
	method="POST",
	body=body,
	meta={"download_maxsize": 50},
	)
	yield crawler.crawl(seed=request)
	failure = crawler.spider.meta["failure"]
	# download_maxsize < 100, hence the CancelledError
	self.assertIsInstance(failure.value, defer.CancelledError)
	# See issue https://twistedmatrix.com/trac/ticket/8175
	raise unittest.SkipTest("xpayload fails on PY3")
	crawler = get_crawler(SingleRequestSpider, self.settings_dict)
	request.headers.setdefault(b"Accept-Encoding", b"gzip,deflate")
	request = request.replace(url=self.mockserver.url("/xpayload"))
	yield crawler.crawl(seed=request)
	# download_maxsize = 50 is enough for the gzipped response
	failure = crawler.spider.meta.get("failure")
	self.assertIsNone(failure)
	reason = crawler.spider.meta["close_reason"]
	self.assertTrue(reason, "finished")