account_test.rb

require 'test_helper'

class AccountTest < ActiveSupport::TestCase
  test 'presence on create' do
    account = Account.create
    refute account.valid?
  end

  test 'inclusion :subtype' do
    # invalid
    account = Account.create(subtype: 'invalid')
    refute account.valid?

    # valid
    %w[c gc cdc].each do |subtype|
      account = Account.create(subtype: subtype)
      assert account.valid?
    end
  end
end