113 lines
3.2 KiB
Ruby
113 lines
3.2 KiB
Ruby
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# frozen_string_literal: true
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require_relative "../../helper"
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require "provider/adapters/cbk"
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class Provider < Sequel::Model(:providers)
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module Adapters
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describe CBK do
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before do
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VCR.insert_cassette("cbk", match_requests_on: [:method, :host], allow_playback_repeats: true)
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end
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after do
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VCR.eject_cassette
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end
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let(:adapter) { CBK.new }
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it "fetches rates" do
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dataset = adapter.fetch(after: Date.new(2025, 1, 1))
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_(dataset).wont_be_empty
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end
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it "stores foreign currency as base and KES as quote" do
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records = adapter.parse({
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"data" => [
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["20/03/2026", "US DOLLAR", "129.5012"],
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],
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})
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_(records.first[:base]).must_equal("USD")
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_(records.first[:quote]).must_equal("KES")
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_(records.first[:rate]).must_equal(129.5012)
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end
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it "parses legacy table with mean rate" do
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records = adapter.parse(
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"data" => [
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["15/06/2020", "EURO", "85.1234", "84.0000", "86.0000"],
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],
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)
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_(records.first[:base]).must_equal("EUR")
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_(records.first[:quote]).must_equal("KES")
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_(records.first[:rate]).must_equal(85.1234)
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end
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it "resolves East African cross-rate names" do
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records = adapter.parse({
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"data" => [
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["20/03/2026", "KES / USHS", "27.5000"],
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["20/03/2026", "KES / TSHS", "20.1000"],
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],
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})
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_(records.length).must_equal(2)
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_(records[0][:base]).must_equal("UGX")
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_(records[1][:base]).must_equal("TZS")
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end
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it "inverts East African cross rates" do
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records = adapter.parse({
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"data" => [
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["20/03/2026", "KES / TSHS", "21.6800"],
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["20/03/2026", "KES / USHS", "27.5000"],
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["20/03/2026", "KEN SHILLING / RWF", "8.5000"],
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],
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})
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_(records.length).must_equal(3)
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# 1 KES = 21.68 TZS means 1 TZS = 1/21.68 KES
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_(records[0][:base]).must_equal("TZS")
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_(records[0][:quote]).must_equal("KES")
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_(records[0][:rate]).must_be_close_to(1.0 / 21.68, 0.0001)
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_(records[1][:base]).must_equal("UGX")
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_(records[1][:quote]).must_equal("KES")
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_(records[1][:rate]).must_be_close_to(1.0 / 27.5, 0.0001)
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_(records[2][:base]).must_equal("RWF")
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_(records[2][:quote]).must_equal("KES")
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_(records[2][:rate]).must_be_close_to(1.0 / 8.5, 0.0001)
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end
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it "divides rates by unit marker parsed from currency name" do
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records = adapter.parse({
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"data" => [
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["20/03/2026", "JPY (100)", "109.3764"],
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],
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})
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_(records.length).must_equal(1)
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_(records.first[:base]).must_equal("JPY")
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_(records.first[:quote]).must_equal("KES")
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_(records.first[:rate]).must_be_close_to(109.3764 / 100, 0.0001)
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end
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it "skips unmapped currencies" do
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records = adapter.parse({
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"data" => [
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["20/03/2026", "UNKNOWN CURRENCY", "1.0000"],
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["20/03/2026", "US DOLLAR", "129.5012"],
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],
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})
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_(records.length).must_equal(1)
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_(records.first[:base]).must_equal("USD")
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end
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end
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end
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end
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