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from unittest import TestCase
from scrapy.spidermiddlewares.depth import DepthMiddleware
from scrapy.http import Response, Request
from scrapy.spiders import Spider
from scrapy.statscollectors import StatsCollector
from scrapy.utils.test import get_crawler
class TestDepthMiddleware(TestCase):
def setUp(self):
crawler = get_crawler(Spider)
self.spider = crawler._create_spider('scrapytest.org')
self.stats = StatsCollector(crawler)
self.stats.open_spider(self.spider)
self.mw = DepthMiddleware(1, self.stats, True)
def test_process_spider_output(self):
req = Request('http://scrapytest.org')
resp = Response('http://scrapytest.org')
resp.request = req
result = [Request('http://scrapytest.org')]
out = list(self.mw.process_spider_output(resp, result, self.spider))
self.assertEqual(out, result)
rdc = self.stats.get_value('request_depth_count/1', spider=self.spider)
self.assertEqual(rdc, 1)
req.meta['depth'] = 1
out2 = list(self.mw.process_spider_output(resp, result, self.spider))
self.assertEqual(out2, [])
rdm = self.stats.get_value('request_depth_max', spider=self.spider)
self.assertEqual(rdm, 1)
def tearDown(self):
self.stats.close_spider(self.spider, '')
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