rails--rails/activerecord/test/aggregations_test.rb

require 'abstract_unit'
require 'fixtures/customer'

class AggregationsTest < Test::Unit::TestCase
  fixtures :customers

  def test_find_single_value_object
    assert_equal 50, customers(:david).balance.amount
    assert_kind_of Money, customers(:david).balance
    assert_equal 300, customers(:david).balance.exchange_to("DKK").amount
  end
  
  def test_find_multiple_value_object
    assert_equal customers(:david).address_street, customers(:david).address.street
    assert(
      customers(:david).address.close_to?(Address.new("Different Street", customers(:david).address_city, customers(:david).address_country))
    )
  end
  
  def test_change_single_value_object
    customers(:david).balance = Money.new(100)
    customers(:david).save
    assert_equal 100, Customer.find(1).balance.amount
  end
  
  def test_immutable_value_objects
    customers(:david).balance = Money.new(100)
    assert_raises(TypeError) {  customers(:david).balance.instance_eval { @amount = 20 } }
  end  
  
  def test_inferred_mapping
    assert_equal "35.544623640962634", customers(:david).gps_location.latitude
    assert_equal "-105.9309951055148", customers(:david).gps_location.longitude
    
    customers(:david).gps_location = GpsLocation.new("39x-110")

    assert_equal "39", customers(:david).gps_location.latitude
    assert_equal "-110", customers(:david).gps_location.longitude
    
    customers(:david).save
    
    customers(:david).reload

    assert_equal "39", customers(:david).gps_location.latitude
    assert_equal "-110", customers(:david).gps_location.longitude
  end
end