Enable editing iterations in BulkUpdateService

This is the backend bits for enabling bulk edits of iterations for
Issues

app/controllers/concerns/issuable_actions.rb

@@ -217,6 +217,7 @@ module IssuableActions
       :issuable_ids,
       :assignee_id,
       :milestone_id,
+      :sprint_id,
       :state_event,
       :subscription_event,
       assignee_ids: [],

app/services/issuable/bulk_update_service.rb

@@ -34,6 +34,8 @@ module Issuable
     def permitted_attrs(type)
       attrs = %i(state_event milestone_id add_label_ids remove_label_ids subscription_event)
 
+      attrs.push(:sprint_id) if type == 'issue'
+
       if type == 'issue' || type == 'merge_request'
         attrs.push(:assignee_ids)
       else

spec/services/issuable/bulk_update_service_spec.rb

@@ -3,8 +3,8 @@
 require 'spec_helper'
 
 RSpec.describe Issuable::BulkUpdateService do
-  let(:user)    { create(:user) }
-  let(:project) { create(:project, :repository, namespace: user.namespace) }
+  let_it_be(:user)    { create(:user) }
+  let_it_be(:project) { create(:project, :repository, namespace: user.namespace) }
 
   def bulk_update(issuables, extra_params = {})
     bulk_update_params = extra_params
@@ -31,6 +31,23 @@ RSpec.describe Issuable::BulkUpdateService do
     end
   end
 
+  shared_examples 'updates iterations' do
+    it 'succeeds' do
+      result = bulk_update(issuables, sprint_id: iteration.id)
+
+      expect(result.success?).to be_truthy
+      expect(result.payload[:count]).to eq(issuables.count)
+    end
+
+    it 'updates the issuables iteration' do
+      bulk_update(issuables, sprint_id: iteration.id)
+
+      issuables.each do |issuable|
+        expect(issuable.reload.iteration).to eq(iteration)
+      end
+    end
+  end
+
   shared_examples 'updating labels' do
     def create_issue_with_labels(labels)
       create(:labeled_issue, project: project, labels: labels)
@@ -233,6 +250,21 @@ RSpec.describe Issuable::BulkUpdateService do
       it_behaves_like 'updates milestones'
     end
 
+    describe 'updating iterations' do
+      let_it_be(:group) { create(:group) }
+      let_it_be(:project) { create(:project, group: group) }
+      let_it_be(:issuables) { [create(:issue, project: project)] }
+      let_it_be(:iteration) { create(:iteration, group: group) }
+
+      let(:parent) { project }
+
+      before do
+        group.add_reporter(user)
+      end
+
+      it_behaves_like 'updates iterations'
+    end
+
     describe 'updating labels' do
       let(:bug) { create(:label, project: project) }
       let(:regression) { create(:label, project: project) }
@@ -283,7 +315,7 @@ RSpec.describe Issuable::BulkUpdateService do
   end
 
   context 'with issuables at a group level' do
-    let(:group) { create(:group) }
+    let_it_be(:group) { create(:group) }
     let(:parent) { group }
 
     before do
@@ -315,6 +347,19 @@ RSpec.describe Issuable::BulkUpdateService do
       end
     end
 
+    describe 'updating iterations' do
+      let_it_be(:iteration) { create(:iteration, group: group) }
+      let_it_be(:project)   { create(:project, :repository, group: group) }
+
+      context 'when issues' do
+        let_it_be(:issue1)    { create(:issue, project: project) }
+        let_it_be(:issue2)    { create(:issue, project: project) }
+        let_it_be(:issuables) { [issue1, issue2] }
+
+        it_behaves_like 'updates iterations'
+      end
+    end
+
     describe 'updating labels' do
       let(:project)        { create(:project, :repository, group: group) }
       let(:bug)            { create(:group_label, group: group) }