Simplify the way to freeze time in specs

spec/features/officing/residence_spec.rb

@@ -1,16 +1,8 @@
 require 'rails_helper'
 
-feature 'Residence' do
+feature 'Residence', :with_frozen_time do
   let(:officer) { create(:poll_officer) }
 
-  background do
-    travel_to Time.now # TODO: use `freeze_time` after migrating to Rails 5.
-  end
-
-  after do
-    travel_back
-  end
-
   feature "Officers without assignments" do
 
     scenario "Can not access residence verification" do

spec/features/officing/results_spec.rb

@@ -1,9 +1,8 @@
 require 'rails_helper'
 
-feature 'Officing Results' do
+feature 'Officing Results', :with_frozen_time do
 
   background do
-    travel_to Time.now # TODO: use `freeze_time` after migrating to Rails 5.
     @poll_officer = create(:poll_officer)
     @officer_assignment = create(:poll_officer_assignment, :final, officer: @poll_officer)
     @poll = @officer_assignment.booth_assignment.poll
@@ -18,10 +17,6 @@ feature 'Officing Results' do
     login_as(@poll_officer.user)
   end
 
-  after do
-    travel_back
-  end
-
   scenario 'Only polls where user is officer for results are accessible' do
     regular_officer_assignment_1 = create(:poll_officer_assignment, officer: @poll_officer)
     regular_officer_assignment_2 = create(:poll_officer_assignment, officer: @poll_officer)

spec/spec_helper.rb

@@ -82,6 +82,14 @@ RSpec.configure do |config|
     Bullet.end_request
   end
 
+  config.before(:each, :with_frozen_time) do
+    travel_to Time.now # TODO: use `freeze_time` after migrating to Rails 5.
+  end
+
+  config.after(:each, :with_frozen_time) do
+    travel_back
+  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"