Merge branch 'fix-bulk-assign-labels-init' into 'master'

Fixes bulk-assign labels not working when navigating through pages

## What does this MR do?
This MR fixes an issue on bulk-assign labels not working when navigating though pages. The functionality was not working because events on checkboxes weren't working. This re-runs `Issuable.initChecks()` and makes sure we are not leaving zombie event handlers by turning them off first.

Also fixes tests to use `wait_for_ajax` since label filtering is now using `Turbolinks` for redirection.

## Does this MR meet the acceptance criteria?

- [ ] [CHANGELOG](https://gitlab.com/gitlab-org/gitlab-ce/blob/master/CHANGELOG) entry added
- [ ] [Documentation created/updated](https://gitlab.com/gitlab-org/gitlab-ce/blob/master/doc/development/doc_styleguide.md)
- [ ] API support added
- [ ] Tests
  - [ ] Added for this feature/bug
  - [x] All builds are passing
- [x] Conform by the [style guides](https://gitlab.com/gitlab-org/gitlab-ce/blob/master/CONTRIBUTING.md#style-guides)
- [x] Branch has no merge conflicts with `master` (if you do - rebase it please)
- [x] [Squashed related commits together](https://git-scm.com/book/en/Git-Tools-Rewriting-History#Squashing-Commits)

See merge request !4632

app/assets/javascripts/issuable.js.coffee

@@ -56,13 +56,6 @@ issuable_created = false
         Issuable.filterResults $('.filter-form')
         $('.js-label-select').trigger('update.label')
 
-  toggleLabelFilters: ->
-    $filteredLabels = $('.filtered-labels')
-    if $filteredLabels.find('.label-row').length > 0
-      $filteredLabels.removeClass('hidden')
-    else
-      $filteredLabels.addClass('hidden')
-
   filterResults: (form) =>
     formData = form.serialize()
 
@@ -71,58 +64,16 @@ issuable_created = false
     issuesUrl = formAction
     issuesUrl += ("#{if formAction.indexOf('?') < 0 then '?' else '&'}")
     issuesUrl += formData
-    $.ajax
-      type: 'GET'
-      url: formAction
-      data: formData
-      complete: ->
-        $('.issues-holder, .merge-requests-holder').css('opacity', '1.0')
-      success: (data) ->
-        $('.issues-holder, .merge-requests-holder').html(data.html)
-        # Change url so if user reload a page - search results are saved
-        history.replaceState {page: issuesUrl}, document.title, issuesUrl
-        Issuable.reload()
-        Issuable.updateStateFilters()
-        $filteredLabels = $('.filtered-labels')
-
-        if typeof Issuable.labelRow is 'function'
-          $filteredLabels.html(Issuable.labelRow(data))
-
-        Issuable.toggleLabelFilters()
-
-      dataType: "json"
-
-  reload: ->
-    if Issuable.created
-      Issuable.initChecks()
 
-    $('#filter_issue_search').val($('#issue_search').val())
+    Turbolinks.visit(issuesUrl);
 
   initChecks: ->
-    $('.check_all_issues').on 'click', ->
+    $('.check_all_issues').off('click').on('click', ->
       $('.selected_issue').prop('checked', @checked)
       Issuable.checkChanged()
+    )
 
-    $('.selected_issue').on 'change', Issuable.checkChanged
-
-  updateStateFilters: ->
-    stateFilters =  $('.issues-state-filters, .dropdown-menu-sort')
-    newParams = {}
-    paramKeys = ['author_id', 'milestone_title', 'assignee_id', 'issue_search', 'issue_search']
-
-    for paramKey in paramKeys
-      newParams[paramKey] = gl.utils.getParameterValues(paramKey)[0] or ''
-
-    if stateFilters.length
-      stateFilters.find('a').each ->
-        initialUrl = gl.utils.removeParamQueryString($(this).attr('href'), 'label_name[]')
-        labelNameValues = gl.utils.getParameterValues('label_name[]')
-        if labelNameValues
-          labelNameQueryString = ("label_name[]=#{value}" for value in labelNameValues).join('&')
-          newUrl = "#{gl.utils.mergeUrlParams(newParams, initialUrl)}&#{labelNameQueryString}"
-        else
-          newUrl = gl.utils.mergeUrlParams(newParams, initialUrl)
-        $(this).attr 'href', newUrl
+    $('.selected_issue').off('change').on('change', Issuable.checkChanged)
 
   checkChanged: ->
     checked_issues = $('.selected_issue:checked')

app/assets/javascripts/issues-bulk-assignment.js.coffee

@@ -9,6 +9,9 @@ class @IssuableBulkActions
 
     @bindEvents()
 
+    # Fixes bulk-assign not working when navigating through pages
+    Issuable.initChecks();
+
   getElement: (selector) ->
     @container.find selector
 

spec/features/issues/filter_by_labels_spec.rb

@@ -56,8 +56,9 @@ feature 'Issue filtering by Labels', feature: true do
     end
 
     it 'should remove label "bug"' do
-      first('.js-label-filter-remove').click
-      expect(find('.filtered-labels')).to have_no_content "bug"
+      find('.js-label-filter-remove').click
+      wait_for_ajax
+      expect(find('.filtered-labels', visible: false)).to have_no_content "bug"
     end
   end
 
@@ -142,7 +143,8 @@ feature 'Issue filtering by Labels', feature: true do
     end
 
     it 'should remove label "enhancement"' do
-      first('.js-label-filter-remove').click
+      find('.js-label-filter-remove', match: :first).click
+      wait_for_ajax
       expect(find('.filtered-labels')).to have_no_content "enhancement"
     end
   end
@@ -179,6 +181,7 @@ feature 'Issue filtering by Labels', feature: true do
     before do
       page.within '.labels-filter' do
         click_button 'Label'
+        wait_for_ajax
         click_link 'bug'
         find('.dropdown-menu-close').click
       end
@@ -189,14 +192,11 @@ feature 'Issue filtering by Labels', feature: true do
     end
 
     it 'should allow user to remove filtered labels' do
-      page.within '.filtered-labels' do
       first('.js-label-filter-remove').click
-        expect(page).not_to have_content 'bug'
-      end
+      wait_for_ajax
 
-      page.within '.labels-filter' do
-        expect(page).not_to have_content 'bug'
-      end
+      expect(find('.filtered-labels', visible: false)).not_to have_content 'bug'
+      expect(find('.labels-filter')).not_to have_content 'bug'
     end
   end
 

spec/features/issues/filter_issues_spec.rb

 require 'rails_helper'
 
 describe 'Filter issues', feature: true do
+  include WaitForAjax
 
   let!(:project)   { create(:project) }
   let!(:user)      { create(:user)}
@@ -21,7 +22,7 @@ describe 'Filter issues', feature: true do
 
       find('.dropdown-menu-user-link', text: user.username).click
 
-      sleep 2
+      wait_for_ajax
     end
 
     context 'assignee', js: true do
@@ -53,7 +54,7 @@ describe 'Filter issues', feature: true do
 
       find('.milestone-filter .dropdown-content a', text: milestone.title).click
 
-      sleep 2
+      wait_for_ajax
     end
 
     context 'milestone', js: true do
@@ -80,23 +81,21 @@ describe 'Filter issues', feature: true do
     before do
       visit namespace_project_issues_path(project.namespace, project)
       find('.js-label-select').click
+      wait_for_ajax
     end
 
     it 'should filter by any label' do
       find('.dropdown-menu-labels a', text: 'Any Label').click
       page.first('.labels-filter .dropdown-title .dropdown-menu-close-icon').click
-      sleep 2
+      wait_for_ajax
 
-      page.within '.labels-filter' do
-        expect(page).to have_content 'Any Label'
-      end
-      expect(find('.js-label-select .dropdown-toggle-text')).to have_content('Any Label')
+      expect(find('.labels-filter')).to have_content 'Label'
     end
 
     it 'should filter by no label' do
       find('.dropdown-menu-labels a', text: 'No Label').click
       page.first('.labels-filter .dropdown-title .dropdown-menu-close-icon').click
-      sleep 2
+      wait_for_ajax
 
       page.within '.labels-filter' do
         expect(page).to have_content 'No Label'
@@ -122,14 +121,14 @@ describe 'Filter issues', feature: true do
 
       find('.dropdown-menu-user-link', text: user.username).click
 
-      sleep 2
+      wait_for_ajax
 
       find('.js-label-select').click
 
       find('.dropdown-menu-labels .dropdown-content a', text: label.title).click
       page.first('.labels-filter .dropdown-title .dropdown-menu-close-icon').click
 
-      sleep 2
+      wait_for_ajax
     end
 
     context 'assignee and label', js: true do
@@ -276,9 +275,12 @@ describe 'Filter issues', feature: true do
 
     it 'should be able to filter and sort issues' do
       click_button 'Label'
+      wait_for_ajax
       page.within '.labels-filter' do
         click_link 'bug'
       end
+      find('.dropdown-menu-close-icon').click
+      wait_for_ajax
 
       page.within '.issues-list' do
         expect(page).to have_selector('.issue', count: 2)
@@ -288,6 +290,7 @@ describe 'Filter issues', feature: true do
       page.within '.dropdown-menu-sort' do
         click_link 'Oldest created'
       end
+      wait_for_ajax
 
       page.within '.issues-list' do
         expect(first('.issue')).to have_content('Frontend')