MoneyTest Gem
Ruby gem for finding the exchange rate between 2 monetary values along with arithmetic manipulations
Configure the currency rates with respect to a base currency (here EUR):
Money.conversion_rates('EUR', {
'USD' => 1.11,
'Bitcoin' => 0.0047
})
Instantiate money objects:
fifty_eur = Money.new(50, 'EUR')
Get amount and currency:
fifty_eur.amount # => 50
fifty_eur.currency # => "EUR"
fifty_eur.inspect # => "50.00 EUR"
Convert to a different currency (should return a Money instance, not a String):
fifty_eur.convert_to('USD') # => 55.50 USD
Perform operations in different currencies:
twenty_dollars = Money.new(20, 'USD')
Arithmetics:
fifty_eur + twenty_dollars # => 68.02 EUR
fifty_eur - twenty_dollars # => 31.98 EUR
fifty_eur / 2 # => 25 EUR
twenty_dollars * 3 # => 60 USD
Comparisons (also in different currencies):
twenty_dollars == Money.new(20, 'USD') # => true
twenty_dollars == Money.new(30, 'USD') # => false
fifty_eur_in_usd = fifty_eur.convert_to('USD')
fifty_eur_in_usd == fifty_eur # => true
twenty_dollars > Money.new(5, 'USD') # => true
twenty_dollars < fifty_eur # => true
Testing
The gem is tested using rspec.