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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 PHPUnit\Framework\TestCase; |
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class PaymentAmountCalculatorTest extends TestCase |
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{ |
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/** |
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* @dataProvider loanData |
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* @param $presentValue |
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* @param $yearlyInterestRate |
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* @param $periodsLengths |
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* @param $expected |
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* @param PaymentAmountCalculatorInterface $calculator |
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* @param int $futureValue |
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*/ |
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public function testGetPaymentAmount( |
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$presentValue, |
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$yearlyInterestRate, |
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$periodsLengths, |
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$expected, |
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PaymentAmountCalculatorInterface $calculator, |
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$futureValue = 0 |
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) { |
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$paymentAmounts = $calculator->getPaymentAmounts($periodsLengths, $presentValue, $yearlyInterestRate, |
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$futureValue); |
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$paymentAmount = current($paymentAmounts); |
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$this->assertEquals($expected, round($paymentAmount, 2)); |
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} |
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public function testConstructor() |
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{ |
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$interestCalculator = new InterestAmountCalculator(); |
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$paymentAmountCalculator = new AnnuityPaymentAmountCalculator($interestCalculator); |
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$this->assertTrue($paymentAmountCalculator instanceof PaymentAmountCalculatorInterface); |
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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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$interestCalculator = new InterestAmountCalculator(); |
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$annuityCalculator = new AnnuityPaymentAmountCalculator($interestCalculator); |
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$equalCalculator = new EqualPrincipalPaymentAmountCalculator($interestCalculator); |
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return [ |
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[100, 0, [1 => 30], 100, $annuityCalculator], |
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[300, 0, [1 => 30, 30, 30], 100, $annuityCalculator], |
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[100, 360, [1 => 30], 130, $annuityCalculator], |
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[200, 360, [1 => 30, 30], 146.96, $annuityCalculator], |
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[200, 360, [1 => 30, 31], 147.93, $annuityCalculator], |
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[200, 360, [1 => 31, 31], 148.58, $annuityCalculator], |
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[100, 0, [1 => 30], 100, $equalCalculator], |
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[300, 0, [1 => 30, 30, 30], 100, $equalCalculator], |
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[300, 0, [1 => 30, 30, 30], 50, $equalCalculator, 150], |
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[300, 360, [1 => 30, 30, 30], 140, $equalCalculator, 150], |
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]; |
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} |
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} |
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kaurikk /
loan-amount-calculator
