Use Date.current to find published milestones

Using `Date.today` caused some milestones to be published before/after
the date defined by `Rails.application.config.time_zone`.

See also commit AyuntamientoMadird/consul@088c76d for a more detailed
explanation.

app/models/budget/investment/milestone.rb

@@ -18,7 +18,7 @@ class Budget
       validate :description_or_status_present?
 
       scope :order_by_publication_date, -> { order(publication_date: :asc) }
-      scope :published,                 -> { where("publication_date <= ?", Date.today) }
+      scope :published,                 -> { where("publication_date <= ?", Date.current) }
       scope :with_status,               -> { where("status_id IS NOT NULL") }
 
       def self.title_max_length

spec/models/budget/investment/milestone_spec.rb

@@ -69,4 +69,16 @@ describe Budget::Investment::Milestone do
     end
   end
 
+  describe ".published" do
+    it "uses the application's time zone date", :with_different_time_zone do
+      published_in_local_time_zone = create(:budget_investment_milestone,
+                                            publication_date: Date.today)
+
+      published_in_application_time_zone = create(:budget_investment_milestone,
+                                                  publication_date: Date.current)
+
+      expect(Budget::Investment::Milestone.published).to include(published_in_application_time_zone)
+      expect(Budget::Investment::Milestone.published).not_to include(published_in_local_time_zone)
+    end
+  end
 end

spec/spec_helper.rb

@@ -90,6 +90,17 @@ RSpec.configure do |config|
     travel_back
   end
 
+  config.before(:each, :with_different_time_zone) do
+    system_zone = ActiveSupport::TimeZone.new("UTC")
+    local_zone = ActiveSupport::TimeZone.new("Madrid")
+
+    # Make sure the date defined by `config.time_zone` and
+    # the local date are different.
+    allow(Time).to receive(:zone).and_return(system_zone)
+    allow(Time).to receive(:now).and_return(Date.current.at_end_of_day.in_time_zone(local_zone))
+    allow(Date).to receive(:today).and_return(Time.now.to_date)
+  end
+
   # Allows RSpec to persist some state between runs in order to support
   # the `--only-failures` and `--next-failure` CLI options.
   config.example_status_persistence_file_path = "spec/examples.txt"