Stop presenting burndown charts promotion for grouped milestones

Trying to present burndown charts promotion generated
https://gitlab.com/gitlab-org/gitlab-ce/issues/46129. We're now making
sure we're not presenting the promotion for grouped by title milestones.

ee/app/helpers/ee/milestones_helper.rb

@@ -10,6 +10,10 @@ module EE
       burndown&.valid? && !burndown&.empty?
     end
 
+    def show_burndown_charts_promotion?(milestone)
+      milestone.is_a?(EE::Milestone) && !milestone.supports_burndown_charts? && show_promotions?
+    end
+
     def show_burndown_placeholder?(milestone, warning)
       return false if cookies['hide_burndown_message'].present?
       return false unless milestone.supports_burndown_charts?

ee/app/views/shared/promotions/_promote_burndown_charts.html.haml

 - callout_id = 'promote_burndown_charts_dismissed'
 
-- if !milestone.supports_burndown_charts? && show_promotions? && show_callout?(callout_id)
+- if show_burndown_charts_promotion?(milestone) && show_callout?(callout_id)
   .user-callout.promotion-callout#promote_burndown_charts{ data: { uid: callout_id } }
     .bordered-box.content-block
       %button.btn.btn-default.close.js-close-callout{ type: 'button', 'aria-label' => 'Dismiss burndown charts promotion' }

ee/changelogs/unreleased/osw-adjust-burndown-charts-promotion.yml

+---
+title: Stop presenting burndown charts promotion for grouped by title milestones
+merge_request:
+author:
+type: fixed

ee/spec/features/burndown_charts_spec.rb

+require 'spec_helper'
+
+feature 'Burndown charts' do
+  let(:current_user) { create(:user) }
+  let(:milestone) do
+    create(:milestone, project: project,
+                       group: group,
+                       start_date: Date.current,
+                       due_date: Date.tomorrow)
+  end
+
+  before do
+    sign_in(current_user)
+  end
+
+  describe 'for project milestones' do
+    let(:group) { nil }
+    let(:project) { create(:project) }
+
+    before do
+      project.add_master(current_user)
+    end
+
+    it 'presents burndown charts when available' do
+      stub_licensed_features(burndown_charts: true)
+
+      visit project_milestone_path(milestone.project, milestone)
+
+      expect(page).to have_css('.burndown-chart')
+      expect(page).to have_content('Burndown chart')
+    end
+
+    it 'presents burndown charts promotion correctly' do
+      stub_licensed_features(burndown_charts: false)
+      allow(License).to receive(:current) { nil }
+
+      visit project_milestone_path(milestone.project, milestone)
+
+      expect(page).not_to have_css('.burndown-chart')
+      expect(page).to have_content('Improve milestones with Burndown Charts')
+    end
+  end
+
+  describe 'for group milestones' do
+    let(:group) { create(:group) }
+    let(:project) { nil }
+
+    before do
+      group.add_master(current_user)
+    end
+
+    it 'presents burndown charts when available' do
+      stub_licensed_features(group_burndown_charts: true)
+
+      visit group_milestone_path(milestone.group, milestone)
+
+      expect(page).to have_css('div.burndown-chart')
+      expect(page).to have_content('Burndown chart')
+    end
+
+    it 'presents burndown charts promotion correctly' do
+      stub_licensed_features(group_burndown_charts: false)
+      allow(License).to receive(:current) { nil }
+
+      visit group_milestone_path(milestone.group, milestone)
+
+      expect(page).not_to have_css('.burndown-chart')
+      expect(page).to have_content('Improve milestones with Burndown Charts')
+    end
+  end
+
+  describe 'grouped by title milestones' do
+    let(:group) { nil }
+    let(:project) { create(:project) }
+
+    before do
+      project.add_master(current_user)
+    end
+
+    it 'does not present burndown chart or promotion' do
+      allow(License).to receive(:current) { nil }
+      allow(Gitlab::CurrentSettings).to receive(:should_check_namespace_plan?) { true }
+
+      visit dashboard_milestone_path(milestone.safe_title, title: milestone.title)
+
+      expect(page).to have_content('manage issues from multiple projects in the same milestone.')
+      expect(page).not_to have_css('.burndown-chart')
+      expect(page).not_to have_content('Improve milestones with Burndown Charts')
+    end
+  end
+end