a_long_test.rb

require "minitest/autorun"

class ALongTest < Minitest::Test

  def setup
    @this_is_cool = true
  end
  
  def test_this_is_cool
    assert @this_is_cool
  end
  
  def test_this_is_not_cool
    assert @this_is_not_cool
  end
  
  
  # a couple hundred lines of code
  ...
  
  private
  def construct_something
    @this_is_not_cool = true
  end

end