convert(100, 12, 3); $aud_currency = Currency::find(12); $eur_currency = Currency::find(3); $converted_synthetic = 100 / ($aud_currency->exchange_rate / $eur_currency->exchange_rate); $this->assertEquals(round($converted_synthetic, 2), round($converted_amount, 2)); } public function testCurrencyConversionWorking() { $converter = new CurrencyApi(); $converted_amount = $converter->convert(100, 1, 2); $this->assertIsFloat($converted_amount); } public function testExchangeRate() { $converter = new CurrencyApi(); $exchange_rate = $converter->exchangeRate(1, 2); $this->assertIsNumeric($exchange_rate); } public function testExchangeRateWithDate() { $date = Carbon::parse('2020-03-08'); $converter = new CurrencyApi(); $exchange_rate = $converter->exchangeRate(1, 2, $date); $this->assertIsNumeric($exchange_rate); } }