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<?php |
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namespace Kauri\Loan\Test; |
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use Kauri\Loan\InterestAmountCalculator; |
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use Kauri\Loan\PaymentAmountCalculator\AnnuityPaymentAmountCalculator; |
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use Kauri\Loan\PaymentAmountCalculator\EqualPrincipalPaymentAmountCalculator; |
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use Kauri\Loan\PaymentAmountCalculatorInterface; |
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use Kauri\Loan\PaymentPeriodsFactory; |
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use Kauri\Loan\PaymentPeriodsInterface; |
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use Kauri\Loan\PaymentsCalculator; |
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use Kauri\Loan\PaymentScheduleConfig; |
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use Kauri\Loan\PaymentScheduleFactory; |
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use PHPUnit\Framework\TestCase; |
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class PaymentsCalculatorTest extends TestCase |
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{ |
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/** |
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* @dataProvider loanData |
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* @param int $noOfPayments |
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* @param int $principal |
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* @param int $interestRate |
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* @param float $expectedPaymentAmount |
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* @param PaymentAmountCalculatorInterface $paymentAmountCalculator |
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*/ |
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public function testCalculatePayments( |
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$noOfPayments, |
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$principal, |
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$interestRate, |
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$expectedPaymentAmount, |
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PaymentAmountCalculatorInterface $paymentAmountCalculator |
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) { |
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$interestAmountCalculator = new InterestAmountCalculator; |
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$config = new PaymentScheduleConfig($noOfPayments, new \DateTime(), 'P3D'); |
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$schedule = PaymentScheduleFactory::generate($config); |
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$periods = PaymentPeriodsFactory::generate($schedule); |
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$paymentsCalculator = new PaymentsCalculator($paymentAmountCalculator, $interestAmountCalculator); |
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$calculationMode = PaymentPeriodsInterface::CALCULATION_MODE_AVERAGE; |
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$payments = $paymentsCalculator->calculatePayments($periods, $principal, $interestRate, $calculationMode); |
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$firstPayment = current($payments); |
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$this->assertEquals($expectedPaymentAmount, $firstPayment['payment']); |
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} |
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/** |
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* @return array |
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*/ |
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public function loanData(): array |
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{ |
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$annuityPaymentAmountCalculator = new AnnuityPaymentAmountCalculator(); |
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$equalPaymentAmountCalculator = new EqualPrincipalPaymentAmountCalculator(); |
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return [ |
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[2, 2500, 0, 1250, $annuityPaymentAmountCalculator], |
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[1, 1000, 360, 1030, $annuityPaymentAmountCalculator], |
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[3, 3000, 0, 1000, $equalPaymentAmountCalculator], |
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[3, 3000, 360, 1090, $equalPaymentAmountCalculator] |
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]; |
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} |
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} |
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kaurikk /
loan-payment-calculator
