wrestlingdev.com/test/models/weight_test.rb

require 'test_helper'

class WeightTest < ActiveSupport::TestCase
  test "the truth" do
     assert true
   end
   
   test "Weight validations" do
      weight = Weight.new
      assert_not weight.valid?
      assert_equal [:tournament, :max], weight.errors.attribute_names
    end
end