Add test that deletes group board via GUI

qa/qa/specs/features/ee/browser_ui/2_plan/issue_boards/delete_group_board_spec.rb

+# frozen_string_literal: true
+
+require 'securerandom'
+
+module QA
+  context 'Plan' do
+    describe 'Group issue boards' do
+      let(:board_1) { "Board-1-#{SecureRandom.hex(4)}" }
+      let(:board_2) { "Board-2-#{SecureRandom.hex(4)}" }
+
+      let(:group) do
+        QA::Resource::Group.fabricate_via_api!
+      end
+
+      before do
+        Runtime::Browser.visit(:gitlab, Page::Main::Login)
+        Page::Main::Login.perform(&:sign_in_using_credentials)
+
+        create_group_board(board_1)
+        create_group_board(board_2)
+
+        Page::Main::Menu.perform(&:go_to_groups)
+        Page::Dashboard::Groups.perform do |groups|
+          groups.click_group(group.path)
+        end
+        Page::Group::Menu.perform(&:go_to_issue_boards)
+      end
+
+      it 'deletes a group issue board via the GUI' do
+        EE::Page::Component::IssueBoard::Show.perform do |show|
+          show.delete_current_board
+          show.click_boards_dropdown_button
+
+          expect(show.boards_dropdown_content).not_to have_content(board_1)
+          expect(show.boards_dropdown_content).to have_content(board_2)
+        end
+      end
+
+      def create_group_board(name)
+        QA::EE::Resource::Board::GroupBoard.fabricate_via_api! do |group_board|
+          group_board.group = group
+          group_board.name = name
+        end
+      end
+    end
+  end
+end