Swimlanes - Rspec tests

Add rspec tests for Epic Swimlanes

ee/spec/features/boards/swimlanes/epics_swimlanes_spec.rb

+# frozen_string_literal: true
+
+require 'spec_helper'
+
+RSpec.describe 'epics swimlanes', :js do
+  let_it_be(:user) { create(:user) }
+  let_it_be(:group) { create(:group, :public) }
+  let_it_be(:project) { create(:project, :public, group: group) }
+
+  let_it_be(:board) { create(:board, project: project) }
+  let_it_be(:label) { create(:label, project: project, name: 'Label 1') }
+  let_it_be(:list) { create(:list, board: board, label: label, position: 0) }
+
+  let_it_be(:issue1) { create(:issue, project: project, labels: [label]) }
+  let_it_be(:issue2) { create(:issue, project: project) }
+  let_it_be(:issue3) { create(:issue, project: project) }
+
+  let_it_be(:epic1) { create(:epic, group: group) }
+  let_it_be(:epic2) { create(:epic, group: group) }
+
+  let_it_be(:epic_issue1) { create(:epic_issue, epic: epic1, issue: issue1) }
+  let_it_be(:epic_issue2) { create(:epic_issue, epic: epic2, issue: issue2) }
+
+  context 'switch to swimlanes view' do
+    context 'feature flag on' do
+      before do
+        stub_licensed_features(epics: true)
+        sign_in(user)
+        visit_board_page
+
+        page.within('.board-swimlanes-toggle-wrapper') do
+          page.find('.dropdown-toggle').click
+          page.find('.dropdown-item', text: 'Epic').click
+        end
+      end
+
+      it 'displays epics swimlanes when selecting Epic in Group by dropdown' do
+        expect(page).to have_css('.board-swimlanes')
+
+        epic_lanes = page.all(:css, '.board-epic-lane')
+        expect(epic_lanes.length).to eq(2)
+      end
+
+      it 'displays issue not assigned to epic in unassigned issues lane' do
+        page.within('.board-lane-unassigned-issues') do
+          expect(page.find('span[data-testid="issues-lane-issue-count"]')).to have_content('1')
+        end
+      end
+    end
+  end
+
+  def visit_board_page
+    visit project_boards_path(project)
+    wait_for_requests
+  end
+end