Fix "See Usage" button not showing

 - Make the data attribute "isGroup" take a string
value instead of boolean, then convert that value to
boolean on the front-end

ee/app/assets/javascripts/billings/subscriptions/index.js

 import Vue from 'vue';
 import Vuex from 'vuex';
+import { parseBoolean } from '~/lib/utils/common_utils';
 import SubscriptionApp from './components/app.vue';
 import initialStore from './store';
 
@@ -30,7 +31,7 @@ export default (containerId = 'js-billing-plans') => {
       namespaceId,
       namespaceName,
       addSeatsHref,
-      isGroup,
+      isGroup: parseBoolean(isGroup),
       planUpgradeHref,
       planRenewHref,
       customerPortalUrl,

ee/app/helpers/billing_plans_helper.rb

@@ -15,7 +15,7 @@ module BillingPlansHelper
     {
       namespace_id: namespace.id,
       namespace_name: namespace.name,
-      is_group: namespace.group?,
+      is_group: namespace.group?.to_s,
       add_seats_href: add_seats_url(namespace),
       plan_upgrade_href: plan_upgrade_url(namespace, plan),
       plan_renew_href: plan_renew_url(namespace),

ee/spec/features/groups/billing_spec.rb

@@ -70,6 +70,7 @@ RSpec.describe 'Groups > Billing', :js do
         expect(page).to have_link("Manage", href: "#{EE::SUBSCRIPTIONS_URL}/subscriptions")
         expect(page).to have_link("Add seats", href: extra_seats_url)
         expect(page).to have_link("Renew", href: renew_url)
+        expect(page).to have_link("See usage", href: group_seat_usage_path(group))
       end
     end
 

ee/spec/helpers/billing_plans_helper_spec.rb

@@ -21,7 +21,7 @@ RSpec.describe BillingPlansHelper do
         expect(helper.subscription_plan_data_attributes(group, plan))
           .to eq(namespace_id: group.id,
                  namespace_name: group.name,
-                 is_group: true,
+                 is_group: "true",
                  add_seats_href: add_seats_href,
                  plan_upgrade_href: upgrade_href,
                  plan_renew_href: renew_href,
@@ -49,7 +49,7 @@ RSpec.describe BillingPlansHelper do
         expect(helper.subscription_plan_data_attributes(group, plan))
           .to eq(namespace_id: group.id,
                  namespace_name: group.name,
-                 is_group: true,
+                 is_group: "true",
                  customer_portal_url: customer_portal_url,
                  billable_seats_href: billable_seats_href,
                  add_seats_href: add_seats_href,
@@ -64,7 +64,7 @@ RSpec.describe BillingPlansHelper do
 
         result = helper.subscription_plan_data_attributes(namespace, plan)
 
-        expect(result).to include(is_group: false)
+        expect(result).to include(is_group: "false")
       end
     end
   end