adjustable max for eventually

spec/spec_helper.rb

@@ -48,14 +48,26 @@ def eu_s3
   end
 end
 
-def eventually(&block)
-  [0,2,4,8,16].each do |delay|
+def eventually(max_delay = 16, &block)
+  delays = [0]
+  delay_step = 1
+  total = 0
+  while true
+    delay = 1
+    delay_step.times do
+      delay *= 2
+    end
+    delays << delay
+    delay_step += 1
+    break if delay >= max_delay
+  end
+  delays.each do |delay|
     begin
       sleep(delay)
       yield
       break
     rescue => error
-      raise error if delay == 16
+      raise error if delay >= max_delay
     end
   end
 end