Add integrations tests for pipeline security page

Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>

app/controllers/projects/pipelines_controller.rb

 class Projects::PipelinesController < Projects::ApplicationController
+  prepend ::EE::Projects::PipelinesController
+
   before_action :whitelist_query_limiting, only: [:create, :retry]
   before_action :pipeline, except: [:index, :new, :create, :charts]
   before_action :commit, only: [:show, :builds, :failures, :security]
@@ -94,14 +96,6 @@ class Projects::PipelinesController < Projects::ApplicationController
     end
   end
 
-  def security
-    if @pipeline.sast_artifact
-      render_show
-    else
-      redirect_to pipeline_path(@pipeline)
-    end
-  end
-
   def status
     render json: PipelineSerializer
       .new(project: @project, current_user: @current_user)

ee/app/controllers/ee/projects/pipelines_controller.rb

+module EE
+  module Projects
+    module PipelinesController
+      extend ActiveSupport::Concern
+
+      def security
+        if @pipeline.sast_artifact
+          render_show
+        else
+          redirect_to pipeline_path(@pipeline)
+        end
+      end
+    end
+  end
+end

ee/spec/controllers/projects/pipelines_controller_spec.rb

+require 'spec_helper'
+
+describe Projects::PipelinesController do
+  set(:user) { create(:user) }
+  set(:project) { create(:project, :repository) }
+
+  before do
+    project.add_developer(user)
+
+    sign_in(user)
+  end
+
+  describe 'GET security' do
+    let(:pipeline) { create(:ci_pipeline, project: project, ref: 'master', sha: project.commit.id) }
+
+    let(:build) do
+      create(
+        :ci_build,
+        :artifacts,
+        name: 'sast',
+        pipeline: pipeline,
+        options: {
+          artifacts: {
+            paths: [Ci::Build::SAST_FILE]
+          }
+        }
+      )
+    end
+
+    before do
+      build
+      get :security, namespace_id: project.namespace, project_id: project, id: pipeline
+    end
+
+    it do
+      expect(response).to have_gitlab_http_status(200)
+      expect(response).to render_template :show
+    end
+  end
+end

ee/spec/features/projects/pipelines/pipeline_spec.rb

 require 'spec_helper'
 
 describe 'Pipeline', :js do
-  let(:project) { create(:project) }
   let(:user) { create(:user) }
+  let(:project) { create(:project, :repository) }
 
   before do
     sign_in(user)
@@ -10,7 +10,6 @@ describe 'Pipeline', :js do
   end
 
   describe 'GET /:project/pipelines/:id/security' do
-    let(:project) { create(:project, :repository) }
     let(:pipeline) { create(:ci_pipeline, project: project, ref: 'master', sha: project.commit.id) }
 
     let(:build) do