Add e2e test for real time assignee updates

Adds an e2e test for real time updates of issue assignees

qa/qa/page/component/issuable/sidebar.rb

@@ -64,11 +64,17 @@ module QA
           end
 
           def has_assignee?(username)
-            page.within(element_selector_css(:assignee_block)) do
+            within_element(:assignee_block) do
               has_text?(username)
             end
           end
 
+          def has_no_assignee_named?(username)
+            within_element(:assignee_block) do
+              has_no_text?(username)
+            end
+          end
+
           def has_avatar_image_count?(count)
             wait_assignees_block_finish_loading do
               all_elements(:avatar_image, count: count)

qa/qa/resource/issue.rb

@@ -57,6 +57,21 @@ module QA
           hash[:weight] = @weight if @weight
         end
       end
+
+      def api_put_path
+        "/projects/#{project.id}/issues/#{iid}"
+      end
+
+      def set_issue_assignees(assignee_ids:)
+        put_body = { assignee_ids: assignee_ids }
+        response = put Runtime::API::Request.new(api_client, api_put_path).url, put_body
+
+        unless response.code == HTTP_STATUS_OK
+          raise ResourceUpdateFailedError, "Could not update issue assignees to #{assignee_ids}. Request returned (#{response.code}): `#{response}`."
+        end
+
+        QA::Runtime::Logger.debug("Successfully updated issue assignees to #{assignee_ids}")
+      end
     end
   end
 end

qa/qa/specs/features/browser_ui/2_plan/issue/real_time_assignee_spec.rb

+# frozen_string_literal: true
+
+module QA
+  RSpec.describe 'Plan', :requires_admin, :actioncable, :orchestrated do
+    describe 'Assignees' do
+      let(:user1) { Resource::User.fabricate_or_use(Runtime::Env.gitlab_qa_username_1, Runtime::Env.gitlab_qa_password_1) }
+      let(:user2) { Resource::User.fabricate_or_use(Runtime::Env.gitlab_qa_username_2, Runtime::Env.gitlab_qa_password_2) }
+      let(:project) do
+        Resource::Project.fabricate_via_api! do |project|
+          project.name = 'project-to-test-assignees'
+        end
+      end
+
+      before do
+        Runtime::Feature.enable('real_time_issue_sidebar', project: project)
+        Runtime::Feature.enable('broadcast_issue_updates', project: project)
+
+        Flow::Login.sign_in
+
+        project.add_member(user1)
+        project.add_member(user2)
+      end
+
+      after do
+        Runtime::Feature.disable('real_time_issue_sidebar', project: project)
+        Runtime::Feature.disable('broadcast_issue_updates', project: project)
+      end
+
+      it 'update without refresh', testcase: 'https://gitlab.com/gitlab-org/quality/testcases/-/issues/1048' do
+        issue = Resource::Issue.fabricate_via_api! do |issue|
+          issue.project = project
+          issue.assignee_ids = [user1.id]
+        end
+
+        issue.visit!
+
+        Page::Project::Issue::Show.perform do |show|
+          expect(show).to have_assignee(user1.name)
+
+          issue.set_issue_assignees(assignee_ids: [user2.id])
+
+          expect(show).to have_assignee(user2.name)
+          expect(show).to have_no_assignee_named(user1.name)
+
+          issue.set_issue_assignees(assignee_ids: [])
+
+          expect(show).to have_no_assignee_named(user1.name)
+          expect(show).to have_no_assignee_named(user2.name)
+        end
+      end
+    end
+  end
+end