Add timed update helper

- was part of the original component in static, but lack of it only caused an error once trying to render the component guide page
- modified a bit from the original, had to require active_support, rewrote minitest to rspec, added timecop, set timezone in tests, configure as app helper

Gemfile.lock

@@ -11,6 +11,7 @@ PATH
       rouge
       sprockets (>= 3)
       sprockets-rails
+      timecop
 
 GEM
   remote: https://rubygems.org/
@@ -595,6 +596,7 @@ GEM
     terser (1.2.4)
       execjs (>= 0.3.0, < 3)
     thor (1.3.2)
+    timecop (0.9.10)
     timeout (0.4.2)
     tzinfo (2.0.6)
       concurrent-ruby (~> 1.0)

app/views/govuk_publishing_components/components/_global_bar.html.erb

@@ -1,5 +1,5 @@
 <%
-  if before_update_time?(year: 2024, month: 7, day: 4, hour: 22, minute: 0)
+  if GovukPublishingComponents::AppHelpers::TimedUpdateHelper.before_update_time?(year: 2024, month: 7, day: 4, hour: 22, minute: 0)
     show_global_bar ||= true # Toggles the appearance of the global bar
     title = "Bring photo ID to vote"
     title_href = "/how-to-vote/photo-id-youll-need"

govuk_publishing_components.gemspec

@@ -25,6 +25,7 @@ Gem::Specification.new do |s|
   s.add_dependency "rouge"
   s.add_dependency "sprockets", ">= 3"
   s.add_dependency "sprockets-rails"
+  s.add_dependency "timecop"
 
   s.add_development_dependency "capybara"
   s.add_development_dependency "climate_control"

lib/govuk_publishing_components.rb

@@ -45,6 +45,7 @@
 require "govuk_publishing_components/app_helpers/brand_helper"
 require "govuk_publishing_components/app_helpers/environment"
 require "govuk_publishing_components/app_helpers/asset_helper"
+require "govuk_publishing_components/app_helpers/timed_update_helper"
 
 # Add i18n paths and views for usage outside of a Rails app
 I18n.load_path.unshift(

lib/govuk_publishing_components/app_helpers/timed_update_helper.rb

@@ -0,0 +1,11 @@
+require "active_support/all"
+
+module GovukPublishingComponents
+  module AppHelpers
+    module TimedUpdateHelper
+      def self.before_update_time?(year:, month:, day:, hour:, minute:)
+        Time.zone.now.before? Time.zone.local(year, month, day, hour, minute)
+      end
+    end
+  end
+end

spec/lib/govuk_publishing_components/app_helpers/timed_update_helper_spec.rb

@@ -0,0 +1,24 @@
+require "spec_helper"
+require "timecop"
+
+RSpec.describe GovukPublishingComponents::AppHelpers::TimedUpdateHelper do
+  describe "Timed Update helper" do
+    it "#before_update_time? returns true if we haven't reached the requested time yet" do
+      Time.zone = "London"
+      Timecop.freeze(2024, 6, 17, 23, 59)
+      expect(GovukPublishingComponents::AppHelpers::TimedUpdateHelper.before_update_time?(year: 2024, month: 6, day: 18, hour: 0, minute: 0)).to be true
+    end
+
+    it "#before_update_time? returns false if we've reached the requested time" do
+      Time.zone = "London"
+      Timecop.freeze(2024, 6, 18, 0, 0)
+      expect(GovukPublishingComponents::AppHelpers::TimedUpdateHelper.before_update_time?(year: 2024, month: 6, day: 18, hour: 0, minute: 0)).to be false
+    end
+
+    it "#before_update_time? returns false if we've passed the requested time" do
+      Time.zone = "London"
+      Timecop.freeze(2024, 6, 20, 10, 10)
+      expect(GovukPublishingComponents::AppHelpers::TimedUpdateHelper.before_update_time?(year: 2024, month: 6, day: 18, hour: 0, minute: 0)).to be false
+    end
+  end
+end