Explore Minitest::Assertions from the top level

minitest_assertions.rb

require 'minitest'

# ##
# # Provide an incrementable `assertions` attr_accessor to use assertions
# # a la carte. Normally this would already be provided by Minitest::Runnable
# # but we want to play with assertions from the top level! \o/
module Minitest::Assertions
  attr_writer :assertions

  def assertions
    @assertions ||= 0
  end
end

include Minitest::Assertions

##
# Now assertions are available:

assert 42
#=> true

assert_in_delta 1.999, 2.0
#=> true