Merge pull request scrapy#1725 from redapple/spiderstate-notconfigured

[MRG+1] Disable SpiderState extension if no JOBDIR set

Author: dangra

scrapy/extensions/spiderstate.py

@@ -2,6 +2,7 @@
 from six.moves import cPickle as pickle
 
 from scrapy import signals
+from scrapy.exceptions import NotConfigured
 from scrapy.utils.job import job_dir
 
 class SpiderState(object):
@@ -12,7 +13,11 @@ def __init__(self, jobdir=None):
 
     @classmethod
     def from_crawler(cls, crawler):
-        obj = cls(job_dir(crawler.settings))
+        jobdir = job_dir(crawler.settings)
+        if not jobdir:
+            raise NotConfigured
+
+        obj = cls(jobdir)
         crawler.signals.connect(obj.spider_closed, signal=signals.spider_closed)
         crawler.signals.connect(obj.spider_opened, signal=signals.spider_opened)
         return obj

tests/test_spiderstate.py

@@ -4,6 +4,8 @@
 
 from scrapy.extensions.spiderstate import SpiderState
 from scrapy.spiders import Spider
+from scrapy.exceptions import NotConfigured
+from scrapy.utils.test import get_crawler
 
 
 class SpiderStateTest(unittest.TestCase):
@@ -34,3 +36,7 @@ def test_state_attribute(self):
         ss.spider_opened(spider)
         self.assertEqual(spider.state, {})
         ss.spider_closed(spider)
+
+    def test_not_configured(self):
+        crawler = get_crawler(Spider)
+        self.assertRaises(NotConfigured, SpiderState.from_crawler, crawler)