require File.dirname(__FILE__) + "/../test_helper"

module ActsAsMoney
  class Product < ActiveRecord::Base
    money :price, :tax, :discount
  end

  class AssignmentMoneyTest < Test::Unit::TestCase
    def test_rounding_new
      assert_equal 19.64, Product.new(:price => (78.55 * 0.25).to_d).price
      assert_equal 0.67, Product.new(:tax => 2.0/3.0).tax
    end

    def test_rounding_persisted
      assert_equal 0.67, Product.create(:tax => 2.0/3.0).reload.tax
    end
    
    def test_nils
      assert_nil Product.new(:price => nil).price
    end

    def test_other_types
      assert_equal 10, Product.new(:price => 10).price
      assert_equal 10.24, Product.new(:price => "10.235").price
    end
    
    def test_should_use_bigdecimal
      assert_equal BigDecimal, Product.new(:price => 1).price.amount.class
      assert_equal Money, Product.new(:price => 1).price.class
    end
    
    def test_should_use_scale_from_column_for_decimales_pieces
      assert_equal 3, Product.new(:discount => 2).discount.decimals
      assert_equal 3, Product.create(:discount => 2).reload.discount.decimals
    end
  end

  class OperationsTest < Test::Unit::TestCase
    def test_rounding_multiplication
      assert_equal 19.64, Money.new(78.55) * 0.25
      assert_equal 4.28, Money.new(28.5) * 0.15
      assert_equal 12.0897, Money.new(10.9906, 4) * 1.1
      assert_equal 12.092, Product.new(:discount => 10.993).discount * 1.1
    end

    def test_rounding_division
      assert_equal 0.67, Product.new(:price => 2).price / 3.0
    end
    
    def test_should_return_money
      assert_equal Money, (Product.new(:price => 1).price * 2).class
    end
    
    def test_sum_should_return_money
      res = Money.new(3, 4) + Money.new(2, 4)
      assert_equal Money, res.class
      assert_equal 4, res.decimals
      assert_equal 5, res
    end
  end

  class ComparissonTest < Test::Unit::TestCase
    def test_should_be_equal
      assert Money.new(1) == Money.new(1)
    end

    def test_should_be_uniq
      assert_equal 1, [Money.new(1), Money.new(1)].uniq.size
      assert_equal 2, [Money.new(1), Money.new(1.1)].uniq.size
    end
  end

  class ToStringTest < Test::Unit::TestCase
    def test_when_nil
      assert_equal "$0.00", Money.new(nil).to_s
    end
    
    def test_when_not_null
      assert_equal "$3.25", Money.new(3.25).to_s
    end
  end
end