+ it 'should lay down /etc/apt/apt.conf.d/15update-stamp' do
+ should contain_file('/etc/apt/apt.conf.d/15update-stamp').with({
+ 'group' => 'root',
+ 'mode' => '0644',
+ 'owner' => 'root',
+ }).with_content('APT::Update::Post-Invoke-Success {"touch /var/lib/apt/periodic/update-success-stamp 2>/dev/null || true";};')
+ end
+