An example of using the Sandi Metz Meter Gem in a test suite.

sandi_meter_spec.rb

require "rails_helper"

RSpec.describe 'Sandi Meter Results' do
  before :all do
    results = %x{ sandi_meter }
    @classes,@methods,@parameters,@controllers = results.scan(/(...)[%]/).flatten.map{ |s| s.to_i }
  end

  it '100% of classes are under 100 lines' do
    expect(@classes).to eq(100)
  end

  it '100% of methods are under 5 lines' do
    expect(@methods).to eq(100)
  end

  it '100% of method calls accepted are less than 4 parameters' do
    expect(@parameters).to eq(100)
  end

  it '100% of controllers have one instance variable per action' do
    expect(@controllers).to eq(100)
  end
end