Adds test cases controller and quality tab

Initial work for adding test cases.

app/views/layouts/nav/sidebar/_project.html.haml

@@ -167,7 +167,7 @@
       = render_if_exists "layouts/nav/requirements_link", project: @project
 
       - if project_nav_tab? :pipelines
-        = nav_link(controller: [:pipelines, :builds, :jobs, :pipeline_schedules, :artifacts], unless: -> { current_path?('projects/pipelines#charts') }) do
+        = nav_link(controller: [:pipelines, :builds, :jobs, :pipeline_schedules, :artifacts, :test_cases], unless: -> { current_path?('projects/pipelines#charts') }) do
           = link_to project_pipelines_path(@project), class: 'shortcuts-pipelines qa-link-pipelines rspec-link-pipelines', data: { qa_selector: 'ci_cd_link' } do
             .nav-icon-container
               = sprite_icon('rocket')
@@ -175,7 +175,7 @@
               = _('CI / CD')
 
           %ul.sidebar-sub-level-items
-            = nav_link(controller: [:pipelines, :builds, :jobs, :pipeline_schedules, :artifacts], html_options: { class: "fly-out-top-item" }) do
+            = nav_link(controller: [:pipelines, :builds, :jobs, :pipeline_schedules, :artifacts, :test_cases], html_options: { class: "fly-out-top-item" }) do
               = link_to project_pipelines_path(@project) do
                 %strong.fly-out-top-item-name
                   =  _('CI / CD')
@@ -204,6 +204,8 @@
                   %span
                     = _('Schedules')
 
+            = render_if_exists "layouts/nav/test_cases_link", project: @project
+
       = render_if_exists 'layouts/nav/sidebar/project_security_link' # EE-specific
 
       - if project_nav_tab? :operations

ee/app/controllers/projects/quality/test_cases_controller.rb

+# frozen_string_literal: true
+
+class Projects::Quality::TestCasesController < Projects::ApplicationController
+  before_action :check_quality_management_available!
+  before_action :authorize_read_issue!
+  before_action :verify_test_cases_flag!
+  before_action do
+    push_frontend_feature_flag(:quality_test_cases, project)
+  end
+
+  def index
+    respond_to do |format|
+      format.html
+    end
+  end
+
+  private
+
+  def verify_test_cases_flag!
+    render_404 unless Feature.enabled?(:quality_test_cases, project)
+  end
+end

ee/app/models/license.rb

@@ -144,6 +144,7 @@ class License < ApplicationRecord
     subepics
     threat_monitoring
     tracing
+    quality_management
   ]
   EEU_FEATURES.freeze
 

ee/app/views/layouts/nav/_test_cases_link.html.haml

+- return unless Feature.enabled?(:quality_test_cases, project)
+- return unless project.feature_available?(:quality_management)
+- return unless can?(current_user, :read_issue, project)
+
+- if project_nav_tab?(:pipelines)
+  = nav_link(controller: :test_cases) do
+    = link_to project_quality_test_cases_path(project), title: _('Test Cases'), class: 'shortcuts-test-cases' do
+      %span
+        = _('Test Cases')

ee/app/views/projects/quality/test_cases/index.html.haml

+- page_title _('Test Cases')
+- breadcrumb_title _("Test Cases")
+

ee/config/feature_flags/development/quality_test_cases.yml

+---
+name: quality_test_cases
+introduced_by_url: https://gitlab.com/gitlab-org/gitlab/-/merge_requests/40019
+rollout_issue_url: https://gitlab.com/gitlab-org/gitlab/-/issues/241983
+group: group::certify
+type: development
+default_enabled: false
\ No newline at end of file

ee/config/routes/project.rb

@@ -15,6 +15,10 @@ constraints(::Constraints::ProjectUrlConstrainer.new) do
           resources :requirements, only: [:index]
         end
 
+        namespace :quality do
+          resources :test_cases, only: [:index]
+        end
+
         resources :feature_flags, param: :iid do
           resources :feature_flag_issues, only: [:index, :create, :destroy], as: 'issues', path: 'issues'
         end

ee/spec/controllers/projects/quality/test_cases_controller_spec.rb

+# frozen_string_literal: true
+
+require 'spec_helper'
+
+RSpec.describe Projects::Quality::TestCasesController do
+  let_it_be(:project) { create(:project) }
+  let_it_be(:user) { create(:user) }
+
+  subject { get :index, params: { namespace_id: project.namespace, project_id: project } }
+
+  describe 'GET #index' do
+    context 'with authorized user' do
+      before do
+        project.add_developer(user)
+        sign_in(user)
+      end
+
+      context 'when feature is available' do
+        before do
+          stub_licensed_features(quality_management: true)
+        end
+
+        it 'renders the index template' do
+          subject
+
+          expect(response).to have_gitlab_http_status(:ok)
+          expect(response).to render_template(:index)
+        end
+
+        context 'when quality_test_cases flag is disabled' do
+          before do
+            stub_feature_flags(quality_test_cases: false)
+          end
+
+          it 'returns 404' do
+            subject
+
+            expect(response).to have_gitlab_http_status(:not_found)
+          end
+        end
+      end
+
+      context 'when feature is not available' do
+        before do
+          stub_licensed_features(quality_management: false)
+        end
+
+        it 'returns 404' do
+          subject
+
+          expect(response).to have_gitlab_http_status(:not_found)
+        end
+      end
+    end
+
+    context 'with unauthorized user' do
+      before do
+        sign_in(user)
+      end
+
+      context 'when feature is available' do
+        before do
+          stub_licensed_features(quality_management: true)
+        end
+
+        it 'returns 404' do
+          subject
+
+          expect(response).to have_gitlab_http_status(:not_found)
+        end
+      end
+    end
+
+    context 'with anonymous user' do
+      it 'returns 302' do
+        subject
+
+        expect(response).to have_gitlab_http_status(:found)
+        expect(response).to redirect_to(new_user_session_path)
+      end
+    end
+  end
+end

locale/gitlab.pot

@@ -24200,6 +24200,9 @@ msgstr ""
 msgid "Test"
 msgstr ""
 
+msgid "Test Cases"
+msgstr ""
+
 msgid "Test coverage parsing"
 msgstr ""