require 'minitest/autorun'
require 'vat_rate'

class TestVatRate < Minitest::Test
  def test_should_check_data
    assert_kind_of Hash, VatRate::RATES

    VatRate::CATEGORIES.each do |category|
      VatRate::RATES["#{category}_rates"].each do |country, rates|
        assert_kind_of String, country
        assert_kind_of Array, rates
        rates.each do |rate|
          assert rate.key?('rate')
          assert_kind_of Numeric, rate['rate']
          assert_kind_of Date, rate['from'] if rate['from']
        end
      end
    end
  end

  def test_should_initialize_rate
    vat_rate = VatRate.new(country: :FR)
    assert_equal 20, vat_rate.rate

    vat_rate = VatRate.new(country: "FR")
    assert_equal 20, vat_rate.rate
  end

  def test_should_get_correct_rate_for_date
    vat_rate = VatRate.new(country: "FR", date: Date.new(2011))
    assert_equal 19.6, vat_rate.rate
  end

  def test_should_get_amounts
    vat_rate = VatRate.new(country: "FR")
    assert_equal 20, vat_rate.rate
    assert_equal 40, vat_rate.vat_amount(200)
    assert_equal 40, vat_rate.vat_amount(200, has_vat: false)
    assert_equal 40, vat_rate.vat_amount(240, has_vat: true)
    assert_equal 240, vat_rate.amount_with_vat(200)
    assert_equal 200, vat_rate.amount_without_vat(240)
  end
end