Add price expiration

#522

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

@@ -0,0 +1,22 @@
+require 'rails_helper'
+
+RSpec.describe 'admin price expire', settings: false do
+  before :example do
+    sign_in_to_admin_area
+  end
+
+  it 'expires price' do
+    price = create(:unexpired_price)
+
+    expect { patch expire_admin_price_path(price); price.reload }
+        .to change { price.expired? }.from(false).to(true)
+  end
+
+  it 'redirects to :index' do
+    price = create(:unexpired_price)
+
+    patch expire_admin_price_path(price)
+
+    expect(response).to redirect_to admin_prices_url
+  end
+end