cov.rb

require 'coverage'
require 'json'

Coverage.start

require 'minitest'

module America
  LOGS = []

  Minitest.after_run {
    File.open('run_log.json', 'w') { |f| f.write JSON.dump LOGS }
  }


    def self.run_one_method klass, method_name, reporter
      puts "Hi mom"
      before = Coverage.peek_result
      super klass, method_name, reporter
      after = Coverage.peek_result
      LOGS << [ klass.name, method_name.to_s, before, after ]
    end
end

Minitest::Runnable.extend America