Create assignee board list resource

And autoload it.

qa/qa/ee.rb

@@ -193,6 +193,7 @@ module QA
 
           module Project
             autoload :BaseBoardList, 'qa/ee/resource/board/board_list/project/base_board_list'
+            autoload :AssigneeBoardList, 'qa/ee/resource/board/board_list/project/assignee_board_list'
             autoload :LabelBoardList, 'qa/ee/resource/board/board_list/project/label_board_list'
             autoload :MilestoneBoardList, 'qa/ee/resource/board/board_list/project/milestone_board_list'
           end

qa/qa/ee/resource/board/board_list/project/assignee_board_list.rb

+# frozen_string_literal: true
+
+module QA
+  module EE
+    module Resource
+      module Board
+        module BoardList
+          module Project
+            class AssigneeBoardList < BaseBoardList
+              attribute :assignee
+
+              def api_post_body
+                {
+                  board_id: board.id,
+                  assignee_id: assignee.id
+                }
+              end
+            end
+          end
+        end
+      end
+    end
+  end
+end

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

@@ -23,8 +23,7 @@ module QA
             issue.labels = [label]
           end
 
-          label_board_list.project.visit!
-          Page::Project::Menu.perform(&:go_to_boards)
+          go_to_project_board(label_board_list.project)
         end
 
         it 'shows the just created board with a "Doing" (label) list, and an issue on it' do
@@ -48,8 +47,7 @@ module QA
             issue.milestone = milestone_board_list.project_milestone
           end
 
-          milestone_board_list.project.visit!
-          Page::Project::Menu.perform(&:go_to_boards)
+          go_to_project_board(milestone_board_list.project)
         end
 
         it 'shows the just created board with a "1.0" (milestone) list, and an issue on it' do
@@ -60,6 +58,46 @@ module QA
           end
         end
       end
+
+      context 'Assignee issue board' do
+        before do
+          @user = Resource::User.fabricate_or_use(Runtime::Env.gitlab_qa_username_1, Runtime::Env.gitlab_qa_password_1)
+
+          project = Resource::Project.fabricate_via_api! do |resource|
+            resource.name = 'project-to-test-assignee-issue-board-list'
+          end
+
+          project.add_member(@user)
+
+          Resource::Issue.fabricate_via_api! do |issue|
+            issue.assignee_ids = [@user.id]
+            issue.project = project
+            issue.title = issue_title
+          end
+
+          @assignee_board_list = EE::Resource::Board::BoardList::Project::AssigneeBoardList.fabricate_via_api! do |board_list|
+            board_list.assignee = @user
+            board_list.project = project
+          end
+
+          go_to_project_board(project)
+        end
+
+        it 'shows the just created board with an assignee list, and an issue on it' do
+          EE::Page::Component::IssueBoard::Show.perform do |show|
+            expect(show.boards_dropdown).to have_content(@assignee_board_list.board.name)
+            expect(show.boards_list_header_with_index(1)).to have_content(@user.name)
+            expect(show.card_of_list_with_index(1)).to have_content(issue_title)
+          end
+        end
+      end
+
+      private
+
+      def go_to_project_board(project)
+        project.visit!
+        Page::Project::Menu.perform(&:go_to_boards)
+      end
     end
   end
 end