How do I stub method_options using Rspec?

Class CLI < Thor  desc "run [age]" "user passes age"  method_option :age,type:'numeric'  def run    variable=options[:a] if options[:a].present?    call_method(a)  endend

How do I mock options[:a] using Rspec if I want to test the following line?

variable=options[:a] if options[:a].present?

Also, how do I test whether the local variable is updated or not?