gistfile1.txt

class Merchant < ActiveRecord::Base
  has_many :cashadvances
  accepts_nested_attributes_for :cashadvances
end


class Cashadvance < ActiveRecord::Base
  belongs_to :merchant
end


require 'test_helper'

class MerchantTest < ActiveSupport::TestCase

    test "saves cashadvance when submitted with merchant" do
    assert_difference('Cashadvance.count') do
      params = { :merchant =>  { :mid => "000027230009876", :dba => "My favorite merchant",
          :cashadvances_attributes => { "0" => { :start_date => "2010-08-23", :advance_amount => "10000",
              :factor_rate => "1.2", :expected_duration => "2" } } } }
      Merchant.create!(params['merchant'])
    end
  end

end