App boot RSpec test, including Sidekiq

boot_spec.rb

require 'rails_helper'

RSpec.describe "your favorite app" do
  it 'boots' do
    assert_nil Rails.application.eager_load!
  end

  context 'sidekiq server' do
    it 'boots too!' do
      allow(Sidekiq).to receive(:server?).and_return true
      allow(Sidekiq::Throttled).to receive(:setup!)
      require_relative '../config/initializers/sidekiq'
      assert true # just make sure it loads
    end
  end
end