add a spec for EE::NotificationService

spec/services/ee/notification_service_spec.rb

+require 'spec_helper'
+
+describe EE::NotificationService do
+  let(:subject) { NotificationService.new }
+
+  def should_email!
+    expect(Notify).to receive(:service_desk_new_note_email).with(issue.id, instance_of(Fixnum))
+  end
+
+  def should_not_email!
+    expect(Notify).not_to receive(:service_desk_new_note_email)
+  end
+
+  def execute!
+    subject.send_service_desk_notification(note)
+  end
+
+  def self.it_should_email!
+    it 'sends the email' do
+      should_email!
+      execute!
+    end
+  end
+
+  def self.it_should_not_email!
+    it 'doesn\'t send the email' do
+      should_not_email!
+      execute!
+    end
+  end
+
+  let(:issue) { create(:issue, author: User.support_bot) }
+  let(:project) { issue.project }
+  let(:note) { create(:note, noteable: issue, project: project) }
+
+  context 'a non-service-desk issue' do
+    it_should_not_email!
+  end
+
+  context 'a service-desk issue' do
+    before do
+      issue.update!(service_desk_reply_to: 'service.desk@example.com')
+      project.update!(service_desk_enabled: true)
+    end
+
+    it_should_email!
+
+    context 'where the project has disabled the feature' do
+      before do
+        project.update(service_desk_enabled: false)
+      end
+
+      it_should_not_email!
+    end
+
+    context 'when the license doesn\'t allow service desk' do
+      before do
+        expect(Gitlab::EE::ServiceDesk).to receive(:enabled?).and_return(false)
+      end
+
+      it_should_not_email!
+    end
+
+    context 'when the support bot has unsubscribed' do
+      before do
+        issue.unsubscribe(User.support_bot, project)
+      end
+
+      it_should_not_email!
+    end
+  end
+end