Contents

require 'spec_helper'

module Danconia
  module Exchanges
    describe CurrencyLayer do
      subject { CurrencyLayer.new access_key: '[KEY]' }

      context 'fetch_rates' do
        it 'uses the API to retrive the rates' do
          stub_request(:get, 'http://www.apilayer.net/api/live?access_key=[KEY]').to_return body: fixture('success.json')
          expect(subject.fetch_rates).to eq 'USDARS' => 27.110001, 'USDAUD' => 1.346196
        end

        it 'when the API returns an error' do
          stub_request(:get, 'http://www.apilayer.net/api/live?access_key=[KEY]').to_return body: fixture('failure.json')
          expect { subject.fetch_rates }.to raise_error Errors::APIError
        end
      end

      context 'update_rates!' do
        it 'fetches the rates and stores them' do
          expect(subject).to receive(:fetch_rates) { {'USDARS' => 3, 'USDAUD' => 4} }
          subject.update_rates!
          expect(subject.store.rates.size).to eq 2
          expect(subject.rate('USD', 'ARS')).to eq 3
          expect(subject.rate('USD', 'AUD')).to eq 4
        end

        it 'if a rate already exists should update it' do
          subject.store.save_rates 'USDARS' => 3
          expect(subject).to receive(:fetch_rates) { {'USDARS' => 3.1} }
          subject.update_rates!
          expect(subject.rate('USD', 'ARS')).to eq 3.1
        end
      end

      def fixture file
        File.read("#{__dir__}/fixtures/currency_layer/#{file}")
      end
    end
  end
end

Version data entries

1 entries across 1 versions & 1 rubygems

Version	Path
danconia-0.2.9	spec/danconia/exchanges/currency_layer_spec.rb