Fix pipeline scheduling when the frequency is more than 1 hour

In the first implementation, we missed the usage of schedule's
cron syntax when calculating the next_run candidates.

app/services/ci/pipeline_schedules/calculate_next_run_service.rb

@@ -12,15 +12,16 @@ module Ci
         return fallback_method.call unless plan_cron&.cron_valid?
 
         now = Time.zone.now
+        plan_min_run = plan_cron.next_time_from(now)
 
         schedule_next_run = schedule_cron.next_time_from(now)
-        return schedule_next_run if worker_cron.match?(schedule_next_run) && plan_cron.match?(schedule_next_run)
+        return schedule_next_run if worker_cron.match?(schedule_next_run) && plan_min_run <= schedule_next_run
 
-        plan_next_run = plan_cron.next_time_from(now)
+        plan_next_run = plan_cron.next_time_from(schedule_next_run)
         return plan_next_run if worker_cron.match?(plan_next_run)
 
-        worker_next_run = worker_cron.next_time_from(now)
-        return worker_next_run if plan_cron.match?(worker_next_run)
+        worker_next_run = worker_cron.next_time_from(schedule_next_run)
+        return worker_next_run if plan_min_run <= worker_next_run
 
         worker_cron.next_time_from(plan_next_run)
       end

spec/models/ci/pipeline_schedule_spec.rb

@@ -123,8 +123,15 @@ RSpec.describe Ci::PipelineSchedule do
       '*/5 * * * *' | '0 * * * *'   | (1.day.in_minutes / 1.hour.in_minutes).to_i  | true  | Time.zone.local(2021, 5, 27, 11, 0)  | Time.zone.local(2021, 5, 27, 12, 0)
       '*/5 * * * *' | '0 * * * *'   | (1.day.in_minutes / 2.hours.in_minutes).to_i | true  | Time.zone.local(2021, 5, 27, 11, 0)  | Time.zone.local(2021, 5, 27, 12, 5)
       '*/5 * * * *' | '0 1 * * *'   | (1.day.in_minutes / 1.hour.in_minutes).to_i  | true  | Time.zone.local(2021, 5, 27, 1, 0)   | Time.zone.local(2021, 5, 28, 1, 0)
-      '*/5 * * * *' | '0 1 * * *'   | (1.day.in_minutes / 1.hour.in_minutes).to_i  | true  | Time.zone.local(2021, 5, 27, 1, 0)   | Time.zone.local(2021, 5, 28, 1, 0)
+      '*/5 * * * *' | '0 1 * * *'   | (1.day.in_minutes / 10).to_i                 | true  | Time.zone.local(2021, 5, 27, 1, 0)   | Time.zone.local(2021, 5, 28, 1, 0)
+      '*/5 * * * *' | '0 1 * * *'   | (1.day.in_minutes / 8).to_i                  | true  | Time.zone.local(2021, 5, 27, 1, 0)   | Time.zone.local(2021, 5, 28, 1, 0)
       '*/5 * * * *' | '0 1 1 * *'   | (1.day.in_minutes / 1.hour.in_minutes).to_i  | true  | Time.zone.local(2021, 5, 1, 1, 0)    | Time.zone.local(2021, 6, 1, 1, 0)
+      '*/9 * * * *' | '0 1 1 * *'   | (1.day.in_minutes / 1.hour.in_minutes).to_i  | true  | Time.zone.local(2021, 5, 1, 1, 9)    | Time.zone.local(2021, 6, 1, 1, 0)
+      '*/9 * * * *' | '0 1 1 * *'   | (1.day.in_minutes / 1.hour.in_minutes).to_i  | false | Time.zone.local(2021, 5, 1, 1, 9)    | Time.zone.local(2021, 6, 1, 1, 9)
+      '*/5 * * * *' | '59 14 * * *' | (1.day.in_minutes / 1.hour.in_minutes).to_i  | true  | Time.zone.local(2021, 5, 1, 15, 0)   | Time.zone.local(2021, 5, 2, 15, 0)
+      '*/5 * * * *' | '59 14 * * *' | (1.day.in_minutes / 1.hour.in_minutes).to_i  | false | Time.zone.local(2021, 5, 1, 15, 0)   | Time.zone.local(2021, 5, 2, 15, 0)
+      '*/5 * * * *' | '45 21 1 2 *' | (1.day.in_minutes / 5).to_i                  | true  | Time.zone.local(2021, 2, 1, 21, 45)  | Time.zone.local(2022, 2, 1, 21, 45)
+      '*/5 * * * *' | '45 21 1 2 *' | (1.day.in_minutes / 5).to_i                  | false | Time.zone.local(2021, 2, 1, 21, 45)  | Time.zone.local(2022, 2, 1, 21, 50)
     end
 
     with_them do