invoiceninja/tests/Feature/UpdateExchangeRatesTest.php

<?php
/**
 * Invoice Ninja (https://invoiceninja.com).
 *
 * @link https://github.com/invoiceninja/invoiceninja source repository
 *
 * @copyright Copyright (c) 2021. Invoice Ninja LLC (https://invoiceninja.com)
 *
 * @license https://www.elastic.co/licensing/elastic-license 
 */
namespace Tests\Feature;

use App\Jobs\Util\UpdateExchangeRates;
use App\Libraries\Currency\Conversion\CurrencyApi;
use App\Models\Currency;
use App\Utils\Traits\MakesHash;
use Illuminate\Database\Eloquent\Model;
use Illuminate\Foundation\Testing\DatabaseTransactions;
use Illuminate\Support\Facades\Cache;
use Illuminate\Support\Facades\Session;
use Tests\MockAccountData;
use Tests\TestCase;

/**
 * @test
 * @covers App\Jobs\Util\UpdateExchangeRates
 */
class UpdateExchangeRatesTest extends TestCase
{
    use MakesHash;
    use DatabaseTransactions;
    use MockAccountData;

    public function setUp() :void
    {
        parent::setUp();

        $this->makeTestData();

        Session::start();

        $this->faker = \Faker\Factory::create();

        Model::reguard();
    }

    public function testExchangeRate()
    {
        if (! empty(config('ninja.currency_converter_api_key'))) {
            $cc_endpoint = sprintf('https://openexchangerates.org/api/latest.json?app_id=%s', config('ninja.currency_converter_api_key'));

            $client = new \GuzzleHttp\Client();
            $response = $client->get($cc_endpoint);

            $currency_api = json_decode($response->getBody());

            UpdateExchangeRates::dispatchNow();

            $currencies = Cache::get('currencies');

            $gbp_currency = $currencies->filter(function ($item) {
                return $item->id == 2;
            })->first();

            $this->assertEquals($currency_api->rates->GBP, $gbp_currency->exchange_rate);
        } else {
            $this->markTestSkipped('No API Key set');
        }
    }

    public function testExchangeRateConversion()
    {
        $usd = Currency::find(1);
        $gbp = Currency::find(2);

        $usd->exchange_rate = 1;
        $usd->save();

        $gbp->exchange_rate = 0.5;
        $gbp->save();

        $currency_api = new CurrencyApi();

        $convert_to_gbp = $currency_api->convert(10, 1, 2);

        $this->assertEquals($convert_to_gbp, 5);
    }

    public function testSyntheticExchangeRate()
    {
        $usd = Currency::find(1);
        $gbp = Currency::find(2);
        $aud = Currency::find(12);

        $usd->exchange_rate = 1;
        $usd->save();

        $gbp->exchange_rate = 0.5;
        $gbp->save();

        $aud->exchange_rate = 1.5;
        $aud->save();

        $currency_api = new CurrencyApi();

        $convert_to_aud = $currency_api->convert(10, 1, 12);

        $this->assertEquals($convert_to_aud, 15);

        $synthetic_exchange = $currency_api->exchangeRate($gbp->id, $aud->id);

        $this->assertEquals($synthetic_exchange, 3);
    }
}