Fail run_benchmark if archive_data_file is specified and not found

telemetry/telemetry/story/story_set_unittest.py

Index: telemetry/telemetry/story/story_set_unittest.py
diff --git a/telemetry/telemetry/story/story_set_unittest.py b/telemetry/telemetry/story/story_set_unittest.py
index 63e6247843ce55d4877d04006ad3ae101926e3ae..1bc9cc2252e603a69b5fde2400c8db7bf2fbd3cf 100644
--- a/telemetry/telemetry/story/story_set_unittest.py
+++ b/telemetry/telemetry/story/story_set_unittest.py
@@ -34,6 +34,10 @@ class StorySetTest(unittest.TestCase):
         ' StorySetFoo is a story set created for testing purpose. ',
         StorySetFoo.Description())
 
+  def testMissingArchiveDataFile(self):
+    with self.assertRaises(IOError):
+      story.StorySet(archive_data_file='non_existant_file')
+
   def testBaseDir(self):
     story_set = StorySetFoo()
     base_dir = story_set.base_dir