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<?php |
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namespace Kauri\Loan\Test; |
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use Kauri\Loan\PaymentPeriods; |
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use Kauri\Loan\Period; |
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use PHPUnit\Framework\TestCase; |
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class PaymentPeriodsTest extends TestCase |
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{ |
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/** |
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* @dataProvider periodsData |
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* @param $averagePeriodLength |
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* @param $paymentPeriods |
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*/ |
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public function testPaymentPeriods($averagePeriodLength, $paymentPeriods) |
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{ |
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$periodsCollection = new PaymentPeriods($averagePeriodLength); |
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$noOfPayments = count($paymentPeriods); |
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$totalLength = 0; |
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$periodLength = 0; |
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$this->assertEquals(0, $periodsCollection->getNoOfPeriods()); |
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$this->assertTrue(empty($periodsCollection->getPeriods())); |
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foreach ($paymentPeriods as $periodLength) { |
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$periodMock = $this->getMockPeriod($periodLength); |
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$periodsCollection->add($periodMock); |
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$totalLength = $totalLength + $periodLength; |
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} |
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$periods = $periodsCollection->getPeriods(); |
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$period = current($periods); |
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$length = $period->getLength(); |
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$this->assertEquals($noOfPayments, $periodsCollection->getNoOfPeriods()); |
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$this->assertTrue(!empty($periodsCollection->getPeriods())); |
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$this->assertEquals($totalLength / $length, |
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$periodsCollection->getNumberOfRemainingPeriods($period, $periodsCollection::CALCULATION_TYPE_EXACT)); |
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$this->assertEquals($noOfPayments, |
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$periodsCollection->getNumberOfRemainingPeriods($period, $periodsCollection::CALCULATION_TYPE_EXACT_INTEREST)); |
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$this->assertEquals($noOfPayments, |
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$periodsCollection->getNumberOfRemainingPeriods($period, $periodsCollection::CALCULATION_TYPE_ANNUITY)); |
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$this->assertEquals($length, |
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$periodsCollection->getRatePerPeriod($period, 360, |
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$periodsCollection::CALCULATION_TYPE_EXACT)); |
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$this->assertEquals($length, |
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$periodsCollection->getRatePerPeriod($period, 360, |
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$periodsCollection::CALCULATION_TYPE_EXACT_INTEREST)); |
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$this->assertEquals($averagePeriodLength, |
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$periodsCollection->getRatePerPeriod($period, 360, |
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$periodsCollection::CALCULATION_TYPE_ANNUITY)); |
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} |
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/** |
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* @dataProvider periodsData |
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* @param int $averagePeriodLength |
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* @param array $paymentPeriods |
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*/ |
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public function testRemainingPeriod(int $averagePeriodLength, array $paymentPeriods) |
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{ |
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$periodsCollection = new PaymentPeriods($averagePeriodLength); |
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foreach ($paymentPeriods as $periodLength) { |
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$periodMock = $this->getMockPeriod($periodLength); |
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$periodsCollection->add($periodMock); |
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} |
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$reversedPeriods = array_reverse($paymentPeriods); |
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$periods = $periodsCollection->getPeriods(); |
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foreach ($periods as $p) { |
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array_pop($reversedPeriods); |
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$exactRemainingPeriodsLength = $periodsCollection->getExactRemainingPeriodsLength($p); |
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$averageRemainingPeriodsLength = $periodsCollection->getAverageRemainingPeriodsLength($p); |
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$this->assertEquals($exactRemainingPeriodsLength, array_sum($reversedPeriods)); |
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$this->assertEquals($averageRemainingPeriodsLength, $averagePeriodLength * count($reversedPeriods)); |
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} |
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} |
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public function periodsData() |
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{ |
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return [ |
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[7, [6, 5, 3, 9]], |
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[30, [29, 30, 31, 30, 28]] |
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]; |
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} |
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/** |
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* @expectedException \Exception |
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*/ |
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public function testRatePerPeriodException() |
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{ |
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$periodsCollection = new PaymentPeriods(1); |
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$periodsCollection->getRatePerPeriod($this->getMockPeriod(3), 10, 10); |
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} |
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/** |
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* @expectedException \Exception |
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*/ |
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public function testNumberOfPeriodsException() |
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{ |
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$periodsCollection = new PaymentPeriods(1); |
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$periodsCollection->getNumberOfRemainingPeriods($this->getMockPeriod(3), 10); |
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} |
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private function getMockPeriod($length) |
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{ |
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$stub = $this->getMockBuilder(Period::class) |
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->disableOriginalConstructor() |
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->setMethods(['getLength']) |
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->getMock(); |
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$stub->method('getLength') |
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->willReturn($length); |
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return $stub; |
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} |
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126
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} |
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kaurikk /
loan-payment-period
