require File.expand_path(File.dirname(__FILE__) + '/spec_helper')

require 'money'
require 'money/bank/google_currency'

require 'json'
MultiJson.engine = :json_gem

describe "GoogleCurrency" do
  before :each do
    @bank = Money::Bank::GoogleCurrency.new
  end

  describe "#get_rate" do
    it "should use #fetch_rate when rate is unknown" do
      @bank.should_receive(:fetch_rate).once
      @bank.get_rate('USD', 'USD')
    end

    it "should not use #fetch_rate when rate is known" do
      @bank.get_rate('USD', 'USD')
      @bank.should_not_receive(:fetch_rate)
      @bank.get_rate('USD', 'USD')
    end

    it "should return the correct rate" do
      @bank.get_rate('USD', 'USD').should == 1.0
    end

    it "should store the rate for faster retreival" do
      @bank.get_rate('USD', 'EUR')
      @bank.rates.should include('USD_TO_EUR')
    end

    context "handles" do
      before :each do
        @uri = double('uri')
        @bank.stub(:build_uri){ |from,to| @uri }
      end

      it "Vietnamese Dong" do
        # rhs decodes (after html entity decoding) to "4.8 x 10<sup>-5</sup> U.S. dollars"
        @uri.stub(:read) { %q({lhs: "1 Vietnamese dong",rhs: "4.8 \x26#215; 10\x3csup\x3e-5\x3c/sup\x3e U.S. dollars",error: "",icc: true}) }
        @bank.get_rate('VND', 'USD').should == BigDecimal("4.8E-5")
      end

      it "Indonesian Rupiah" do
        @uri.stub(:read) { "{lhs: \"1 U.S. dollar\",rhs: \"10\xA0000 Indonesian rupiahs\",error: \"\",icc: true}" }
        @bank.get_rate('IDR', 'USD').should == BigDecimal("0.1E5")
      end
    end
  end

  describe "#flush_rates" do
    it "should empty @rates" do
      @bank.get_rate('USD', 'EUR')
      @bank.flush_rates
      @bank.rates.should == {}
    end
  end

  describe "#flush_rate" do
    it "should remove a specific rate from @rates" do
      @bank.get_rate('USD', 'EUR')
      @bank.get_rate('USD', 'JPY')
      @bank.flush_rate('USD', 'EUR')
      @bank.rates.should include('USD_TO_JPY')
      @bank.rates.should_not include('USD_TO_EUR')
    end
  end
end