Do not track `list_repositories` twice

app/controllers/groups/registry/repositories_controller.rb

@@ -7,13 +7,13 @@ module Groups
       before_action :feature_flag_group_container_registry_browser!
 
       def index
-        track_event(:list_repositories)
-
         respond_to do |format|
           format.html
           format.json do
             @images = group.container_repositories.with_api_entity_associations
 
+            track_event(:list_repositories)
+
             render json: ContainerRepositoriesSerializer
               .new(current_user: current_user)
               .represent_read_only(@images)

app/controllers/projects/registry/repositories_controller.rb

@@ -7,12 +7,13 @@ module Projects
       before_action :ensure_root_container_repository!, only: [:index]
 
       def index
-        @images = project.container_repositories
-        track_event(:list_repositories)
-
         respond_to do |format|
           format.html
           format.json do
+            @images = project.container_repositories
+
+            track_event(:list_repositories)
+
             render json: ContainerRepositoriesSerializer
               .new(project: project, current_user: current_user)
               .represent(@images)

spec/controllers/groups/registry/repositories_controller_spec.rb

@@ -17,6 +17,8 @@ describe Groups::Registry::RepositoriesController do
   context 'GET #index' do
     context 'when container registry is enabled' do
       it 'show index page' do
+        expect(Gitlab::Tracking).not_to receive(:event)
+
         get :index, params: {
             group_id: group
         }
@@ -54,7 +56,8 @@ describe Groups::Registry::RepositoriesController do
         expect(Gitlab::Tracking).to receive(:event).with(anything, 'list_repositories', {})
 
         get :index, params: {
-          group_id: group
+          group_id: group,
+          format: :json
         }
       end
     end

spec/controllers/projects/registry/repositories_controller_spec.rb

@@ -35,6 +35,8 @@ describe Projects::Registry::RepositoriesController do
           end
 
           it 'successfully renders container repositories' do
+            expect(Gitlab::Tracking).not_to receive(:event)
+
             go_to_index
 
             expect(response).to have_gitlab_http_status(:ok)
@@ -43,7 +45,7 @@ describe Projects::Registry::RepositoriesController do
           it 'tracks the event' do
             expect(Gitlab::Tracking).to receive(:event).with(anything, 'list_repositories', {})
 
-            go_to_index
+            go_to_index(format: :json)
           end
 
           it 'creates a root container repository' do