zammad/spec/jobs/app_version_restart_job_spec.rb

require 'rails_helper'

RSpec.describe AppVersionRestartJob, type: :job do

  let(:cmd) { '/path/to/restart_script.sh' }

  it 'executes app version restart job' do
    expect(::Kernel).to receive(:system).with(cmd)
    described_class.perform_now(cmd)
  end
end