Fixed dashboard milestone tabs not loading

Closes #33477

3 files changed, 87 insertions, 5 deletions

diff --git a/spec/controllers/dashboard/milestones_controller_spec.rb b/spec/controllers/dashboard/milestones_controller_spec.rb
new file mode 100644
index 00000000000..424f39fd3b8
--- /dev/null
+++ b/spec/controllers/dashboard/milestones_controller_spec.rb
@@ -0,0 +1,38 @@
+require 'spec_helper'
+
+describe Dashboard::MilestonesController do
+  let(:project) { create(:empty_project) }
+  let(:user)    { create(:user) }
+  let(:project_milestone) { create(:milestone, project: project) }
+  let(:milestone) do
+    DashboardMilestone.build(
+      [project],
+      project_milestone.title
+    )
+  end
+  let(:issue) { create(:issue, project: project, milestone: project_milestone) }
+  let!(:label) { create(:label, project: project, title: 'Issue Label', issues: [issue]) }
+  let!(:merge_request) { create(:merge_request, source_project: project, target_project: project, milestone: project_milestone) }
+  let(:milestone_path) { dashboard_milestone_path(milestone.safe_title, title: milestone.title) }
+
+  before do
+    sign_in(user)
+    project.team << [user, :master]
+  end
+
+  it_behaves_like 'milestone tabs'
+
+  describe "#show" do
+    render_views
+
+    def view_milestone
+      get :show, id: milestone.safe_title, title: milestone.title
+    end
+
+    it 'shows milestone page' do
+      view_milestone
+
+      expect(response).to have_http_status(200)
+    end
+  end
+end
diff --git a/spec/features/dashboard/milestone_tabs_spec.rb b/spec/features/dashboard/milestone_tabs_spec.rb
new file mode 100644
index 00000000000..0c7b992c500
--- /dev/null
+++ b/spec/features/dashboard/milestone_tabs_spec.rb
@@ -0,0 +1,40 @@
+require 'spec_helper'
+
+describe 'Dashboard milestone tabs', :js, :feature do
+  let(:user) { create(:user) }
+  let(:project) { create(:empty_project) }
+  let!(:label) { create(:label, project: project) }
+  let(:project_milestone) { create(:milestone, project: project) }
+  let(:milestone) do
+    DashboardMilestone.build(
+      [project],
+      project_milestone.title
+    )
+  end
+  let!(:merge_request) { create(:labeled_merge_request, source_project: project, target_project: project, milestone: project_milestone, labels: [label]) }
+
+  before do
+    project.add_master(user)
+    login_as(user)
+
+    visit dashboard_milestone_path(milestone.safe_title, title: milestone.title)
+  end
+
+  it 'loads merge requests async' do
+    click_link 'Merge Requests'
+
+    expect(page).to have_selector('.merge_requests-sortable-list')
+  end
+
+  it 'loads participants async' do
+    click_link 'Participants'
+
+    expect(page).to have_selector('#tab-participants .bordered-list')
+  end
+
+  it 'loads labels async' do
+    click_link 'Labels'
+
+    expect(page).to have_selector('#tab-labels .bordered-list')
+  end
+end
diff --git a/spec/support/milestone_tabs_examples.rb b/spec/support/milestone_tabs_examples.rb
index 4ad8b0a16e1..7cfc1e06975 100644
--- a/spec/support/milestone_tabs_examples.rb
+++ b/spec/support/milestone_tabs_examples.rb
@@ -1,10 +1,14 @@
 shared_examples 'milestone tabs' do
   def go(path, extra_params = {})
-    params = if milestone.is_a?(GlobalMilestone)
-               { group_id: group.to_param, id: milestone.safe_title, title: milestone.title }
-             else
-               { namespace_id: project.namespace.to_param, project_id: project, id: milestone.iid }
-             end
+    params =
+      case milestone
+      when DashboardMilestone
+        { id: milestone.safe_title, title: milestone.title }
+      when GroupMilestone
+        { group_id: group.to_param, id: milestone.safe_title, title: milestone.title }
+      else
+        { namespace_id: project.namespace.to_param, project_id: project, id: milestone.iid }
+      end
 
     get path, params.merge(extra_params)
   end