Assertion Checking

gistfile1.md

class StrawMan
  attr_accessor :assertion_log

  @assertion_log = []

  class << self
    def check_assertions(name, &assertion)
      alias_method :some_crazy_uuid, name

      define_method(name) do |*args, &block|
        assertion_log << Array(assertion.call(*args))
        method(:some_crazy_uuid).call(*args, &block)
      end
    end
  end

  
  # Test methods

  def sum(x,y)
    x.to_i + y.to_i
  end

  check_assertions(:sum) do |x,y|
    x.respond_to?(to_i) && y.respond_to?(to_i)
  end
end