Skeleton route and view for alert management details page

app/controllers/projects/alert_management_controller.rb

@@ -6,6 +6,9 @@ class Projects::AlertManagementController < Projects::ApplicationController
   def index
   end
 
+  def details
+  end
+
   private
 
   def ensure_feature_enabled

app/views/projects/alert_management/details.html.haml

+- page_title _('Alert Details')

config/routes/project.rb

@@ -277,7 +277,9 @@ constraints(::Constraints::ProjectUrlConstrainer.new) do
           end
         end
 
-        resources :alert_management, only: [:index], controller: :alert_management
+        resources :alert_management, only: [:index] do
+          get 'details', on: :member
+        end
 
         namespace :error_tracking do
           resources :projects, only: :index

locale/gitlab.pot

@@ -1689,6 +1689,9 @@ msgid_plural "Alerts"
 msgstr[0] ""
 msgstr[1] ""
 
+msgid "Alert Details"
+msgstr ""
+
 msgid "AlertManagement|Alert"
 msgstr ""
 

spec/controllers/projects/alert_management_controller_spec.rb

@@ -6,6 +6,7 @@ describe Projects::AlertManagementController do
   let_it_be(:project) { create(:project) }
   let_it_be(:role) { :reporter }
   let_it_be(:user) { create(:user) }
+  let_it_be(:id) { 1 }
 
   before do
     project.add_role(user, role)
@@ -37,4 +38,30 @@ describe Projects::AlertManagementController do
       end
     end
   end
+
+  describe 'GET #details' do
+    context 'when alert_management_minimal is enabled' do
+      before do
+        stub_feature_flags(alert_management_minimal: true)
+      end
+
+      it 'shows the page' do
+        get :details, params: { namespace_id: project.namespace, project_id: project, id: id }
+
+        expect(response).to have_gitlab_http_status(:ok)
+      end
+    end
+
+    context 'when alert_management_minimal is disabled' do
+      before do
+        stub_feature_flags(alert_management_minimal: false)
+      end
+
+      it 'shows 404' do
+        get :details, params: { namespace_id: project.namespace, project_id: project, id: id }
+
+        expect(response).to have_gitlab_http_status(:not_found)
+      end
+    end
+  end
 end