frankfurter/spec/quote/interval_spec.rb

# frozen_string_literal: true

require_relative "../helper"
require "quote/interval"

module Quote
  describe Interval do
    let(:dates) do
      (Date.parse("2010-01-01")..Date.parse("2010-12-31"))
    end

    let(:quote) do
      Interval.new(date: dates)
    end

    before do
      quote.perform
    end

    it "returns rates" do
      _(quote.formatted[:rates]).wont_be(:empty?)
    end

    it "quotes given date interval" do
      returned_start = Date.parse(quote.formatted[:start_date])
      returned_end = Date.parse(quote.formatted[:end_date])

      # The returned start date should be the closest working day (before or on) the requested start
      _(returned_start).must_be(:<=, dates.first)
      # But it shouldn't be too far back (maybe 10 business days)
      _(returned_start).must_be(:>, dates.first - 10)

      # End date should still be within the requested range
      _(returned_end).must_be(:<=, dates.last)
    end

    it "quotes against the Euro" do
      quote.formatted[:rates].each_value do |rates|
        _(rates.keys).wont_include("EUR")
      end
    end

    it "sorts rates" do
      quote.formatted[:rates].each_value do |rates|
        _(rates.keys).must_equal(rates.keys.sort)
      end
    end

    it "has a cache key" do
      _(quote.cache_key).wont_be(:empty?)
    end

    describe "given a new base" do
      let(:quote) do
        Interval.new(date: dates, base: "USD")
      end

      it "quotes against that base" do
        quote.formatted[:rates].each_value do |rates|
          _(rates.keys).wont_include("USD")
        end
      end

      it "sorts rates" do
        quote.formatted[:rates].each_value do |rates|
          _(rates.keys).must_equal(rates.keys.sort)
        end
      end
    end

    describe "given symbols" do
      let(:quote) do
        Interval.new(date: dates, symbols: ["USD", "GBP", "JPY"])
      end

      it "quotes only for those symbols" do
        quote.formatted[:rates].each_value do |rates|
          _(rates.keys).must_include("USD")
          _(rates.keys).wont_include("CAD")
        end
      end

      it "sorts rates" do
        quote.formatted[:rates].each_value do |rates|
          _(rates.keys).must_equal(rates.keys.sort)
        end
      end
    end

    describe "when given an amount" do
      let(:quote) do
        Interval.new(date: dates, amount: 100)
      end

      it "calculates quotes for that amount" do
        quote.formatted[:rates].each_value do |rates|
          _(rates["USD"]).must_be(:>, 10)
        end
      end
    end
  end
end