DST hour_of_day realign bugfix (#464)

* fix offset bug when base_interval_validation.type is not hourly

* fix dst hour realignment bug

* update changelog with dst bugfix description

Co-authored-by: Jake Brady <jbrady1@godaddy.com>
Co-authored-by: Jon Pascoe <jon.pascoe@me.com>

Author: 3 people

CHANGELOG.md

@@ -10,6 +10,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ### Fixed
 - Fix for weekly interval results when requesting `occurrences_between` on a narrow range ([#487](https://github.com/seejohnrun/ice_cube/pull/487)) by [@jakebrady5](https://github.com/jakebrady5)
+- When using a rule with hour_of_day validations, and asking for occurrences on the day that DST skips forward, valid occurrences would be missed. ([#464](https://github.com/seejohnrun/ice_cube/pull/464)) by [@jakebrady5](https://github.com/jakebrady5)
 
 ## [0.16.4] - 2021-10-21
 ### Added

lib/ice_cube/validations/hour_of_day.rb

@@ -20,7 +20,7 @@ def realign(opening_time, start_time)
       freq = base_interval_validation.interval
 
       first_hour = Array(validations[:hour_of_day]).min_by(&:value)
-      time = TimeUtil::TimeWrapper.new(start_time, false)
+      time = TimeUtil::TimeWrapper.new(start_time, true)
       if freq > 1 && base_interval_validation.type == :hour
         offset = first_hour.validate(opening_time, start_time)
         time.add(:hour, offset - freq)

spec/examples/daily_rule_spec.rb

@@ -56,6 +56,15 @@ module IceCube
           Time.local(2013, 3, 11, 2, 0, 0) # -0700
         ])
       end
+
+      it "should not skip days where DST changes" do
+        start_time = Time.local(2013, 3, 10, 0, 0, 0)
+        schedule = Schedule.new(start_time)
+        schedule.add_recurrence_rule Rule.daily.hour_of_day(19)
+        expect(schedule.occurrences_between(start_time, start_time + ONE_DAY)).to eq([
+          Time.local(2013, 3, 10, 19, 0, 0)
+        ])
+      end
     end
 
     it "should update previous interval" do