status: add error? method

We'll define setting seen == -1 to be an error since
it's impossible to see -1 bytes.

1 files changed, 4 insertions, 0 deletions

diff --git a/lib/upr/status.rb b/lib/upr/status.rb
index b84357e..e3f4024 100644
--- a/lib/upr/status.rb
+++ b/lib/upr/status.rb
@@ -2,5 +2,9 @@ module Upr
 
   # this is what we store in the Moneta-backed monitor
   class Status < Struct.new(:seen, :length)
+
+    def error?
+      seen == -1
+    end
   end
 end