Add InviteDossierFacade tests

spec/facades/invite_dossier_facades_spec.rb

@@ -0,0 +1,15 @@
+require 'spec_helper'
+
+describe InviteDossierFacades do
+
+  let(:dossier) { create :dossier }
+  let(:email) { 'email@octo.com' }
+
+  subject { described_class.new dossier.id, email }
+
+  before do
+    create :invite, email: email, dossier: dossier
+  end
+
+  it { expect(subject.dossier).to eq dossier }
+end