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import unittest
from scrapy.spider import BaseSpider
from scrapy.xlib.pydispatch import dispatcher
from scrapy.statscol import StatsCollector, DummyStatsCollector
from scrapy.signals import stats_spider_opened, stats_spider_closing, \
stats_spider_closed
class StatsCollectorTest(unittest.TestCase):
def setUp(self):
self.spider = BaseSpider('foo')
def test_collector(self):
stats = StatsCollector()
self.assertEqual(stats.get_stats(), {})
self.assertEqual(stats.get_value('anything'), None)
self.assertEqual(stats.get_value('anything', 'default'), 'default')
stats.set_value('test', 'value')
self.assertEqual(stats.get_stats(), {'test': 'value'})
stats.set_value('test2', 23)
self.assertEqual(stats.get_stats(), {'test': 'value', 'test2': 23})
self.assertEqual(stats.get_value('test2'), 23)
stats.inc_value('test2')
self.assertEqual(stats.get_value('test2'), 24)
stats.inc_value('test2', 6)
self.assertEqual(stats.get_value('test2'), 30)
stats.max_value('test2', 6)
self.assertEqual(stats.get_value('test2'), 30)
stats.max_value('test2', 40)
self.assertEqual(stats.get_value('test2'), 40)
stats.max_value('test3', 1)
self.assertEqual(stats.get_value('test3'), 1)
stats.min_value('test2', 60)
self.assertEqual(stats.get_value('test2'), 40)
stats.min_value('test2', 35)
self.assertEqual(stats.get_value('test2'), 35)
stats.min_value('test4', 7)
self.assertEqual(stats.get_value('test4'), 7)
def test_dummy_collector(self):
stats = DummyStatsCollector()
self.assertEqual(stats.get_stats(), {})
self.assertEqual(stats.get_value('anything'), None)
self.assertEqual(stats.get_value('anything', 'default'), 'default')
stats.set_value('test', 'value')
stats.inc_value('v1')
stats.max_value('v2', 100)
stats.min_value('v3', 100)
stats.open_spider('a')
stats.set_value('test', 'value', spider=self.spider)
self.assertEqual(stats.get_stats(), {})
self.assertEqual(stats.get_stats('a'), {})
def test_signals(self):
signals_catched = set()
def spider_opened(spider):
assert spider is self.spider
signals_catched.add(stats_spider_opened)
def spider_closing(spider, reason):
assert spider is self.spider
assert reason == 'testing'
signals_catched.add(stats_spider_closing)
def spider_closed(spider, reason, spider_stats):
assert spider is self.spider
assert reason == 'testing'
assert spider_stats == {'test': 1}
signals_catched.add(stats_spider_closed)
dispatcher.connect(spider_opened, signal=stats_spider_opened)
dispatcher.connect(spider_closing, signal=stats_spider_closing)
dispatcher.connect(spider_closed, signal=stats_spider_closed)
stats = StatsCollector()
stats.open_spider(self.spider)
stats.set_value('test', 1, spider=self.spider)
self.assertEqual([(self.spider, {'test': 1})], list(stats.iter_spider_stats()))
stats.close_spider(self.spider, 'testing')
assert stats_spider_opened in signals_catched
assert stats_spider_closing in signals_catched
assert stats_spider_closed in signals_catched
dispatcher.disconnect(spider_opened, signal=stats_spider_opened)
dispatcher.disconnect(spider_closing, signal=stats_spider_closing)
dispatcher.disconnect(spider_closed, signal=stats_spider_closed)
if __name__ == "__main__":
unittest.main()
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