choosealicense.com/spec/license_fields_spec.rb

require 'spec_helper'

describe "license fillable fields" do
  licenses.each do |license|
    context "The #{license["title"]} license" do
      it "should only contain supported fillable fields" do
        matches = license["content"].scan(/\[([a-z]+)\]/)
        extra_fields = matches.flatten - fields.map { |f| f["name"] }
        expect(extra_fields).to be_empty
      end
    end
  end
end