RSpec.shared_examples_for 'guard command' do |info|
  def run_on_option=(info)
    # run_on_change -> change
    # run_all -> all
    run_option = info[:command].to_s.match(/(.*_)?(\w+)/)[2].to_sym
    options[:run_on] = [run_option]
  end

  it "should execute #{info[:command]} when said so" do
    self.run_on_option = info
    expect(subject).to receive(:compile_assets)
    subject.send(info[:command])
  end
  it "should not execute #{info[:command]} when disabled" do
    options[:run_on] = [:something_other]
    expect(subject).not_to receive(:compile_assets)
    subject.send(info[:command])
  end

  it "should #{info[:run] ? '' : 'not '}execute #{info[:command]} by default" do
    options[:run_on] = nil
    if info[:run]
      expect(subject).to receive(:compile_assets)
    else
      expect(subject).not_to receive(:compile_assets)
    end
    subject.send(info[:command])
  end
end