Add i18n support, tests for category tabs

ee/app/views/shared/issuable/_epic_nav.html.haml

@@ -4,11 +4,11 @@
 
 %ul.nav-links.epics-state-filters
   %li{ class: active_when(params[:state] == 'opened') }>
-    = link_to page_filter_path(state: 'opened', label: true), id: 'state-opened', title: "Filter by #{page_context_word} that are currently opened.", data: { state: 'opened' } do
+    = link_to page_filter_path(state: 'opened', label: true), id: 'state-opened', title: (_("Filter by %{issuable_type} that are currently opened.") % { issuable_type: page_context_word }), data: { state: 'opened' } do
       #{issuables_state_counter_text(type, :opened, display_count)}
 
   %li{ class: active_when(params[:state] == 'closed') }>
-    = link_to page_filter_path(state: 'closed', label: true), id: 'state-closed', title: 'Filter by issues that are currently closed.', data: { state: 'closed' } do
+    = link_to page_filter_path(state: 'closed', label: true), id: 'state-closed', title: (_("Filter by %{issuable_type} that are currently closed.") % { issuable_type: page_context_word }), data: { state: 'closed' } do
       #{issuables_state_counter_text(type, :closed, display_count)}
 
   = render 'shared/issuable/nav_links/all', page_context_word: page_context_word, counter: issuables_state_counter_text(type, :all, display_count)

ee/spec/features/epics/epics_list_spec.rb

@@ -19,6 +19,19 @@ describe 'epics list', :js do
       visit group_epics_path(group)
     end
 
+    it 'shows epics tabs for each status type' do
+      page.within('.epics-state-filters') do
+        expect(page).to have_selector('li > a#state-opened')
+        expect(find('li > a#state-opened')[:title]).to eq('Filter by epics that are currently opened.')
+
+        expect(page).to have_selector('li > a#state-closed')
+        expect(find('li > a#state-closed')[:title]).to eq('Filter by epics that are currently closed.')
+
+        expect(page).to have_selector('li > a#state-all')
+        expect(find('li > a#state-all')[:title]).to eq('Show all epics.')
+      end
+    end
+
     it 'shows the epics in the navigation sidebar' do
       expect(first('.nav-sidebar  .active a .nav-item-name')).to have_content('Epics')
       expect(first('.nav-sidebar .active a .count')).to have_content('3')

locale/gitlab.pot

@@ -3212,6 +3212,12 @@ msgstr ""
 msgid "Filter"
 msgstr ""
 
+msgid "Filter by %{issuable_type} that are currently closed."
+msgstr ""
+
+msgid "Filter by %{issuable_type} that are currently opened."
+msgstr ""
+
 msgid "Filter by commit message"
 msgstr ""