1 files changed, 53 insertions, 0 deletions
diff --git a/qa/qa/specs/features/browser_ui/2_plan/issue/real_time_assignee_spec.rb b/qa/qa/specs/features/browser_ui/2_plan/issue/real_time_assignee_spec.rb
new file mode 100644
index 00000000000..26a83fc3caa
--- /dev/null
+++ b/qa/qa/specs/features/browser_ui/2_plan/issue/real_time_assignee_spec.rb
@@ -0,0 +1,53 @@
+# 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