Handle a few jobs scheduled at the same time

lib/crono/cli.rb

@@ -79,9 +79,10 @@ module Crono
     end
 
     def start_working_loop
-      while (job = Crono.scheduler.next)
-        sleep(job.next - Time.now)
-        job.perform
+      while true
+        next_time, jobs = Crono.scheduler.next_jobs
+        sleep(next_time - Time.now)
+        jobs.each(&:perform)
       end
     end
 

lib/crono/job.rb

@@ -17,8 +17,7 @@ module Crono
     end
 
     def next
-      next_time = period.next(since: last_performed_at)
-      next_time.past? ? period.next : next_time
+      period.next(since: last_performed_at)
     end
 
     def description

lib/crono/scheduler.rb

@@ -12,14 +12,8 @@ module Crono
       jobs << job
     end
 
-    def next
-      queue.first
-    end
-
-    private
-
-    def queue
-      jobs.sort_by(&:next)
+    def next_jobs
+      jobs.group_by(&:next).sort_by {|time,_| time }.first
     end
   end