Add price expiration

#522

spec/features/admin/billing/prices/expire_spec.rb

@@ -0,0 +1,25 @@
+require 'rails_helper'
+
+RSpec.feature 'Expiring price in admin area', settings: false do
+  given!(:price) { create(:unexpired_price) }
+
+  background do
+    sign_in_to_admin_area
+  end
+
+  scenario 'expires price' do
+    visit admin_prices_path
+    open_edit_form
+    expire
+
+    expect(page).to have_text(t('admin.billing.prices.expire.expired'))
+  end
+
+  def open_edit_form
+    find('.edit-price-btn').click
+  end
+
+  def expire
+    click_link_or_button t('admin.billing.prices.edit.expire_btn')
+  end
+end