Add testcase for catching exception from open_spider() from pipeline

tests/pipelines.py

+"""
+Some pipelines used for testing and benchmarking
+"""
+
+class ZeroDivisionErrorPipeline(object):
+
+    def open_spider(self, spider):
+        a = 1/0
+
+    def process_item(self, item, spider):
+        return item

tests/test_crawl.py

@@ -250,6 +250,18 @@ with multiples lines
         yield self.assertFailure(crawler.crawl(), TestError)
         self.assertFalse(crawler.crawling)
 
+    @defer.inlineCallbacks
+    def test_open_spider_error_on_faulty_pipeline(self):
+        settings = {
+            "ITEM_PIPELINES": {
+                "tests.pipelines.ZeroDivisionErrorPipeline": 300,
+            }
+        }
+        crawler = CrawlerRunner(settings).create_crawler(SimpleSpider)
+        yield self.assertFailure(
+            self.runner.crawl(crawler, "http://localhost:8998/status?n=200"),
+            ZeroDivisionError)
+
     @defer.inlineCallbacks
     def test_crawlerrunner_accepts_crawler(self):
         crawler = self.runner.create_crawler(SimpleSpider)