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<?php
namespace Kauri\Loan\Test;
use Kauri\Loan\InterestAmountCalculator;
use PHPUnit\Framework\TestCase;
class InterestAmountCalculatorTest extends TestCase
{
/**
* @dataProvider loadData
* @param $presentValue
* @param $currentPeriod
* @param $yearlyInterestRate
* @param $expectedInterest
*/
public function testGetInterestAmount($presentValue, $currentPeriod, $yearlyInterestRate, $expectedInterest)
$ratePerPeriod = $yearlyInterestRate / 360 * $currentPeriod;
$calculator = new InterestAmountCalculator();
$interestAmount = $calculator->getInterestAmount($presentValue, $ratePerPeriod);
$this->assertEquals($expectedInterest, $interestAmount);
}
public function loadData()
return [
// Regular annuity
[100, 30, 360, 30],
[100, 30, 180, 15],
// Exact
[100, 10, 360, 10],
[100, 29, 180, 14.5]
];
kaurikk /
loan-amount-calculator
