FIX: allow site_name to be present in rejection email subject

spec/mailers/rejection_mailer_spec.rb

@@ -0,0 +1,29 @@
+require "spec_helper"
+
+describe RejectionMailer do
+
+  describe "send_rejection" do
+
+    context 'sends rejection email' do
+      let (:user) { Fabricate(:user) }
+      let (:template_args) { {former_title: "Mail Subject", destination: user.email, site_name: SiteSetting.title} }
+      let (:reject_mail) { RejectionMailer.send_rejection("email_reject_topic_not_found", user.email, template_args) }
+
+      it 'renders the senders email' do
+        expect(reject_mail.to).to eql([user.email])
+      end
+
+      it 'renders the subject' do
+        expect(reject_mail.subject).to be_present
+      end
+
+      it 'renders site title in subject' do
+        expect(reject_mail.subject).to match(SiteSetting.title)
+      end
+
+      it 'renders the body' do
+        expect(reject_mail.body).to be_present
+      end
+    end
+  end
+end