sure/test/lib/money_test.rb

require "test_helper"
require "ostruct"

class MoneyTest < ActiveSupport::TestCase
  test "can create with default currency" do
    value = Money.new(1000)
    assert_equal 1000, value.amount
  end

  test "can create with custom currency" do
    value1 = Money.new(1000, :EUR)
    value2 = Money.new(1000, :eur)
    value3 = Money.new(1000, "eur")
    value4 = Money.new(1000, "EUR")

    assert_equal value1.currency.iso_code, value2.currency.iso_code
    assert_equal value2.currency.iso_code, value3.currency.iso_code
    assert_equal value3.currency.iso_code, value4.currency.iso_code
  end

  test "equality tests amount and currency" do
    assert_equal Money.new(1000), Money.new(1000)
    assert_not_equal Money.new(1000), Money.new(1001)
    assert_not_equal Money.new(1000, :usd), Money.new(1000, :eur)
  end

  test "can compare with zero Numeric" do
    assert_equal Money.new(0), 0
    assert_raises(TypeError) { Money.new(1) == 1 }
  end

  test "can negate" do
    assert_equal (-Money.new(1000)), Money.new(-1000)
  end

  test "can use comparison operators" do
    assert_operator Money.new(1000), :>, Money.new(999)
    assert_operator Money.new(1000), :>=, Money.new(1000)
    assert_operator Money.new(1000), :<, Money.new(1001)
    assert_operator Money.new(1000), :<=, Money.new(1000)
  end

  test "can add and subtract" do
    assert_equal Money.new(1000) + Money.new(1000), Money.new(2000)
    assert_equal Money.new(1000) + 1000, Money.new(2000)
    assert_equal Money.new(1000) - Money.new(1000), Money.new(0)
    assert_equal Money.new(1000) - 1000, Money.new(0)
  end

  test "can multiply" do
    assert_equal Money.new(1000) * 2, Money.new(2000)
    assert_raises(TypeError) { Money.new(1000) * Money.new(2) }
  end

  test "can divide" do
    assert_equal Money.new(1000) / 2, Money.new(500)
    assert_equal Money.new(1000) / Money.new(500), 2
    assert_raise(TypeError) { 1000 / Money.new(2) }
  end

  test "operator order does not matter" do
    assert_equal Money.new(1000) + 1000, 1000 + Money.new(1000)
    assert_equal Money.new(1000) - 1000, 1000 - Money.new(1000)
    assert_equal Money.new(1000) * 2, 2 * Money.new(1000)
  end

  test "can get absolute value" do
    assert_equal Money.new(1000).abs, Money.new(1000)
    assert_equal Money.new(-1000).abs, Money.new(1000)
  end

  test "can test if zero" do
    assert Money.new(0).zero?
    assert_not Money.new(1000).zero?
  end

  test "can test if negative" do
    assert Money.new(-1000).negative?
    assert_not Money.new(1000).negative?
  end

  test "can test if positive" do
    assert Money.new(1000).positive?
    assert_not Money.new(-1000).positive?
  end

  test "can format" do
    assert_equal "$1,000.90", Money.new(1000.899).to_s
    assert_equal "€1,000.12", Money.new(1000.12, :eur).to_s
    assert_equal "€ 1.000,12", Money.new(1000.12, :eur).format(locale: :nl)
  end

  test "formats correctly for French locale" do
    # French uses non-breaking spaces (NBSP = \u00A0) between thousands and before currency symbol
    assert_equal "1\u00A0000,12\u00A0€", Money.new(1000.12, :eur).format(locale: :fr)
    assert_equal "1\u00A0000,12\u00A0$", Money.new(1000.12, :usd).format(locale: :fr)
  end

  test "formats correctly for German locale" do
    assert_equal "1.000,12 €", Money.new(1000.12, :eur).format(locale: :de)
    assert_equal "1.000,12 $", Money.new(1000.12, :usd).format(locale: :de)
  end

  test "formats correctly for Spanish locale" do
    assert_equal "1.000,12 €", Money.new(1000.12, :eur).format(locale: :es)
  end

  test "formats correctly for Italian locale" do
    assert_equal "1.000,12 €", Money.new(1000.12, :eur).format(locale: :it)
  end

  test "formats correctly for Portuguese (Brazil) locale" do
    assert_equal "R$ 1.000,12", Money.new(1000.12, :brl).format(locale: :"pt-BR")
  end

  test "formats correctly for Polish locale" do
    # Polish uses space as thousands delimiter, comma as decimal separator, symbol after number
    assert_equal "1 000,12 zł", Money.new(1000.12, :pln).format(locale: :pl)
    assert_equal "1 000,12 €", Money.new(1000.12, :eur).format(locale: :pl)
  end

  test "formats correctly for Turkish locale" do
    # Turkish uses dot as thousands delimiter, comma as decimal separator, symbol after number
    assert_equal "1.000,12 ₺", Money.new(1000.12, :try).format(locale: :tr)
    assert_equal "1.000,12 €", Money.new(1000.12, :eur).format(locale: :tr)
  end

  test "formats correctly for Norwegian Bokmål locale" do
    # Norwegian uses space as thousands delimiter, comma as decimal separator, symbol after number
    assert_equal "1 000,12 kr", Money.new(1000.12, :nok).format(locale: :nb)
    assert_equal "1 000,12 €", Money.new(1000.12, :eur).format(locale: :nb)
  end

  test "formats correctly for Catalan locale" do
    # Catalan uses dot as thousands delimiter, comma as decimal separator, symbol after number
    assert_equal "1.000,12 €", Money.new(1000.12, :eur).format(locale: :ca)
  end

  test "formats correctly for Romanian locale" do
    # Romanian uses dot as thousands delimiter, comma as decimal separator, symbol after number
    assert_equal "1.000,12 Lei", Money.new(1000.12, :ron).format(locale: :ro)
    assert_equal "1.000,12 €", Money.new(1000.12, :eur).format(locale: :ro)
  end

  test "formats correctly for Dutch locale" do
    # Dutch uses dot as thousands delimiter, comma as decimal separator, symbol before number
    assert_equal "€ 1.000,12", Money.new(1000.12, :eur).format(locale: :nl)
    assert_equal "$ 1.000,12", Money.new(1000.12, :usd).format(locale: :nl)
  end

  test "formats correctly for Chinese Simplified locale" do
    # Chinese Simplified uses English-style formatting (comma as thousands delimiter, dot as decimal separator)
    assert_equal "¥1,000.12", Money.new(1000.12, :cny).format(locale: :"zh-CN")
  end

  test "formats correctly for Chinese Traditional locale" do
    # Chinese Traditional uses English-style formatting (comma as thousands delimiter, dot as decimal separator)
    # TWD symbol is prefixed with "TW" to distinguish from other dollar currencies
    assert_equal "TW$1,000.12", Money.new(1000.12, :twd).format(locale: :"zh-TW")
  end

  test "all supported locales can format money without errors" do
    # Ensure all supported locales from LanguagesHelper::SUPPORTED_LOCALES work
    supported_locales = LanguagesHelper::SUPPORTED_LOCALES

    supported_locales.each do |locale|
      locale_sym = locale.to_sym
      # Format with USD and EUR to ensure locale handling works for different currencies
      result_usd = Money.new(1000.12, :usd).format(locale: locale_sym)
      result_eur = Money.new(1000.12, :eur).format(locale: locale_sym)

      assert result_usd.present?, "Locale #{locale} should format USD without errors"
      assert result_eur.present?, "Locale #{locale} should format EUR without errors"
    end
  end

  test "converts currency when rate available" do
    ExchangeRate.expects(:find_or_fetch_rate).returns(OpenStruct.new(rate: 1.2))

    assert_equal Money.new(1000).exchange_to(:eur), Money.new(1000 * 1.2, :eur)
  end

  test "raises when no conversion rate available and no fallback rate provided" do
    ExchangeRate.expects(:find_or_fetch_rate).returns(nil)

    assert_raises Money::ConversionError do
      Money.new(1000).exchange_to(:jpy)
    end
  end

  test "converts currency with a fallback rate" do
    ExchangeRate.expects(:find_or_fetch_rate).returns(nil).twice

    assert_equal 0, Money.new(1000).exchange_to(:jpy, fallback_rate: 0)
    assert_equal Money.new(1000, :jpy), Money.new(1000, :usd).exchange_to(:jpy, fallback_rate: 1)
  end
end