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Contents
require 'spec_helper'
module Danconia
module Exchanges
describe FixedRates do
context 'rate' do
it 'returns the exchange rate value for the supplied currencies' do
exchange = FixedRates.new rates: {'USDEUR' => 3, 'USDARS' => 4}
expect(exchange.rate 'USD', 'EUR').to eq 3
expect(exchange.rate 'USD', 'ARS').to eq 4
end
it 'returns nil if not found' do
expect { subject.rate 'USD', 'EUR' }.to raise_error Errors::ExchangeRateNotFound
end
it 'if the direct conversion is not found, tries to find the inverse' do
exchange = FixedRates.new rates: {'USDEUR' => 3}
expect(exchange.rate 'EUR', 'USD').to eq (1.0 / 3).round 6
end
it 'if not direct nor inverse conversion is found and both are different than USD, tries to convert through USD' do
exchange = FixedRates.new rates: {'USDEUR' => 3, 'USDARS' => 6}
expect(exchange.rate 'EUR', 'ARS').to be_within(0.00001).of 2
expect(exchange.rate 'ARS', 'EUR').to be_within(0.00001).of 0.5
end
end
end
end
end
Version data entries
8 entries across 8 versions & 1 rubygems