Update GCP feature spec with check page flow

spec/features/projects/clusters/gcp_spec.rb

@@ -20,6 +20,11 @@ feature 'Gcp Cluster', :js do
         .to receive(:expires_at_in_session).and_return(1.hour.since.to_i.to_s)
     end
 
+    context 'when user has a GCP project with billing enabled' do
+      before do
+        stub_google_project_billing_status
+      end
+
       context 'when user does not have a cluster and visits cluster index page' do
         before do
           visit project_clusters_path(project)
@@ -123,6 +128,20 @@ feature 'Gcp Cluster', :js do
       end
     end
 
+    context 'when user does not have a GCP project with billing enabled' do
+      before do
+        visit project_clusters_path(project)
+
+        click_link 'Add cluster'
+        click_link 'Create on GKE'
+      end
+
+      it 'user sees a check page' do
+        expect(page).to have_link('Continue')
+      end
+    end
+  end
+
   context 'when user has not signed with Google' do
     before do
       visit project_clusters_path(project)