Moneyexchange
Write a Ruby gem to perform currency conversion and arithmetics with different currencies. The expected features and the usage of the gem should be something like this:
### Configure the currency rates with respect to a base currency (here EUR):
Conversion rates:
Base 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
For the purpose of this exercise, when implementing equality, you can consider two monetary amounts as equal if they agree up to the cents.
Installation
Add this line to your application's Gemfile:
gem 'moneyexchange'
And then execute:
$ bundle
Or install it yourself as:
$ gem install moneyexchange
Usage
TODO: Write usage instructions here
Development
After checking out the repo, run bin/setup
to install dependencies. Then, run rake spec
to run the tests. You can also run bin/console
for an interactive prompt that will allow you to experiment.
To install this gem onto your local machine, run bundle exec rake install
. To release a new version, update the version number in version.rb
, and then run bundle exec rake release
, which will create a git tag for the version, push git commits and tags, and push the .gem
file to rubygems.org.
Contributing
Bug reports and pull requests are welcome on GitHub at https://github.com/[USERNAME]/moneyexchange. This project is intended to be a safe, welcoming space for collaboration, and contributors are expected to adhere to the Contributor Covenant code of conduct.
License
The gem is available as open source under the terms of the MIT License.
Code of Conduct
Everyone interacting in the Moneyexchange project’s codebases, issue trackers, chat rooms and mailing lists is expected to follow the code of conduct.