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Add more tests and fix bugs

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This commit is contained in:
Dennis Eichhorn 2018-02-21 21:16:35 +01:00
parent ae87bc9ab5
commit c43d83d8c0
19 changed files with 239 additions and 39 deletions
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18
Business/Finance/FinanceFormulas.php
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@ -33,6 +33,9 @@ class FinanceFormulas
/**
* Annual Percentage Yield
*
* The annual percentage yield (APY) calculates the yield taking compounding
* into consideration.
*
* @latex APY = \left(1+ \frac{r}{n}\right)^{n}-1
*
@ -811,7 +814,7 @@ class FinanceFormulas
*/
public static function getPeriodsOfEAA(float $C, float $NPV, float $r) : int
{
return (int) round(log(-$r * $NPV / $C + 1) / log(1 + $r));
return (int) round(-log(1 - $r * $NPV / $C) / log(1 + $r));
}
/**
@ -827,7 +830,7 @@ class FinanceFormulas
*/
public static function getNetPresentValueOfEAA(float $C, float $r, int $n) : float
{
return $C / $r * (1 - pow(1 + $r, -$n));
return $C * (1 - pow(1 + $r, -$n)) / $r;
}
/**
@ -868,6 +871,10 @@ class FinanceFormulas
/**
* Future Value
*
* The Future Value (FV) is used to calculate the value of a cash flow after a specific amount of periods.
*
* @latex FV = C_{0} \cdot \left(1 + r\right)^{n}
*
* @param float $C Cash flow at period 0
* @param float $r Rate of return
@ -900,6 +907,11 @@ class FinanceFormulas
/**
* Future Value Factor
*
* The future value factor is used to calculate a facture which can be used to calculate
* the future value after a certain amount of periods at a give interest rate.
*
* @latex f = \left(1 + r\right)^{n}
*
* @param float $r Rate of return
* @param int $n Number of periods
@ -924,7 +936,7 @@ class FinanceFormulas
*/
public static function getGeometricMeanReturn(array $r) : float
{
return Average::geometricMean($r) - 1;
return Average::geometricMean($r);
}
/**

6
DataStorage/Cache/CacheFactory.php
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@ -4,7 +4,7 @@
*
* PHP Version 7.1
*
* @package TBD
* @package phpOMS\DataStorage\Cache
* @copyright Dennis Eichhorn
* @license OMS License 1.0
* @version 1.0.0
@ -15,9 +15,9 @@ declare(strict_types=1);
namespace phpOMS\DataStorage\Cache;
/**
* Database connection factory.
* Cache connection factory.
*
* @package Framework
* @package phpOMS\DataStorage\Cache
* @license OMS License 1.0
* @link http://website.orange-management.de
* @since 1.0.0

4
DataStorage/Cache/CacheInterface.php
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@ -4,7 +4,7 @@
*
* PHP Version 7.1
*
* @package TBD
* @package phpOMS\DataStorage\Cache
* @copyright Dennis Eichhorn
* @license OMS License 1.0
* @version 1.0.0
@ -19,7 +19,7 @@ use phpOMS\Stdlib\Base\Exception\InvalidEnumValue;
/**
* Cache interface.
*
* @package Framework
* @package phpOMS\DataStorage\Cache
* @license OMS License 1.0
* @link http://website.orange-management.de
* @since 1.0.0

4
DataStorage/Cache/CachePool.php
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@ -4,7 +4,7 @@
*
* PHP Version 7.1
*
* @package TBD
* @package phpOMS\DataStorage\Cache
* @copyright Dennis Eichhorn
* @license OMS License 1.0
* @version 1.0.0
@ -23,7 +23,7 @@ use phpOMS\Config\OptionsTrait;
* Responsible for caching scalar data types and arrays.
* Caching HTML output and objects coming soon/is planned.
*
* @package Framework
* @package phpOMS\DataStorage\Cache
* @license OMS License 1.0
* @link http://website.orange-management.de
* @since 1.0.0

4
DataStorage/Cache/CacheStatus.php
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@ -4,7 +4,7 @@
*
* PHP Version 7.1
*
* @package TBD
* @package phpOMS\DataStorage\Cache
* @copyright Dennis Eichhorn
* @license OMS License 1.0
* @version 1.0.0
@ -21,7 +21,7 @@ use phpOMS\Stdlib\Base\Enum;
*
* Possible caching status
*
* @package Framework
* @package phpOMS\DataStorage\Cache
* @license OMS License 1.0
* @link http://website.orange-management.de
* @since 1.0.0

4
DataStorage/Cache/CacheType.php
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@ -4,7 +4,7 @@
*
* PHP Version 7.1
*
* @package TBD
* @package phpOMS\DataStorage\Cache
* @copyright Dennis Eichhorn
* @license OMS License 1.0
* @version 1.0.0
@ -21,7 +21,7 @@ use phpOMS\Stdlib\Base\Enum;
*
* Possible caching types
*
* @package Framework
* @package phpOMS\DataStorage\Cache
* @license OMS License 1.0
* @link http://website.orange-management.de
* @since 1.0.0

4
DataStorage/Cache/FileCache.php
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@ -4,7 +4,7 @@
*
* PHP Version 7.1
*
* @package TBD
* @package phpOMS\DataStorage\Cache
* @copyright Dennis Eichhorn
* @license OMS License 1.0
* @version 1.0.0
@ -23,7 +23,7 @@ use phpOMS\System\File\Local\File;
*
* PHP Version 7.1
*
* @package Framework
* @package phpOMS\DataStorage\Cache
* @license OMS License 1.0
* @link http://website.orange-management.de
* @since 1.0.0

4
DataStorage/Cache/MemCache.php
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@ -4,7 +4,7 @@
*
* PHP Version 7.1
*
* @package TBD
* @package phpOMS\DataStorage\Cache
* @copyright Dennis Eichhorn
* @license OMS License 1.0
* @version 1.0.0
@ -17,7 +17,7 @@ namespace phpOMS\DataStorage\Cache;
/**
* Memcache class.
*
* @package Framework
* @package phpOMS\DataStorage\Cache
* @license OMS License 1.0
* @link http://website.orange-management.de
* @since 1.0.0

4
DataStorage/Cache/MemCached.php
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@ -4,7 +4,7 @@
*
* PHP Version 7.1
*
* @package TBD
* @package phpOMS\DataStorage\Cache
* @copyright Dennis Eichhorn
* @license OMS License 1.0
* @version 1.0.0
@ -17,7 +17,7 @@ namespace phpOMS\DataStorage\Cache;
/**
* Memcache class.
*
* @package Framework
* @package phpOMS\DataStorage\Cache
* @license OMS License 1.0
* @link http://website.orange-management.de
* @since 1.0.0

4
DataStorage/Cache/NullCache.php
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@ -4,7 +4,7 @@
*
* PHP Version 7.1
*
* @package TBD
* @package phpOMS\DataStorage\Cache
* @copyright Dennis Eichhorn
* @license OMS License 1.0
* @version 1.0.0
@ -17,7 +17,7 @@ namespace phpOMS\DataStorage\Cache;
/**
* Null cache class.
*
* @package Framework
* @package phpOMS\DataStorage\Cache
* @license OMS License 1.0
* @link http://website.orange-management.de
* @since 1.0.0

4
DataStorage/Cache/RedisCache.php
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@ -4,7 +4,7 @@
*
* PHP Version 7.1
*
* @package TBD
* @package phpOMS\DataStorage\Cache
* @copyright Dennis Eichhorn
* @license OMS License 1.0
* @version 1.0.0
@ -19,7 +19,7 @@ namespace phpOMS\DataStorage\Cache;
*
* PHP Version 5.6
*
* @package Framework
* @package phpOMS\DataStorage\Cache
* @license OMS License 1.0
* @link http://website.orange-management.de
* @since 1.0.0

4
DataStorage/Cache/WinCache.php
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@ -4,7 +4,7 @@
*
* PHP Version 7.1
*
* @package TBD
* @package phpOMS\DataStorage\Cache
* @copyright Dennis Eichhorn
* @license OMS License 1.0
* @version 1.0.0
@ -19,7 +19,7 @@ namespace phpOMS\DataStorage\Cache;
*
* PHP Version 5.6
*
* @package Framework
* @package phpOMS\DataStorage\Cache
* @license OMS License 1.0
* @link http://website.orange-management.de
* @since 1.0.0

4
DataStorage/Cookie/CookieJar.php
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@ -4,7 +4,7 @@
*
* PHP Version 7.1
*
* @package TBD
* @package phpOMS\DataStorage\Cookie
* @copyright Dennis Eichhorn
* @license OMS License 1.0
* @version 1.0.0
@ -19,7 +19,7 @@ use phpOMS\DataStorage\LockException;
/**
* CookieJar class
*
* @package Framework
* @package phpOMS\DataStorage\Cookie
* @license OMS License 1.0
* @link http://website.orange-management.de
* @since 1.0.0

4
DataStorage/DataMapperInterface.php
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@ -4,7 +4,7 @@
*
* PHP Version 7.1
*
* @package TBD
* @package phpOMS\DataStorage
* @copyright Dennis Eichhorn
* @license OMS License 1.0
* @version 1.0.0
@ -21,7 +21,7 @@ use phpOMS\DataStorage\Database\Query\Builder;
*
* DB, Cache, Session
*
* @package Framework
* @package phpOMS\DataStorage
* @license OMS License 1.0
* @link http://website.orange-management.de
* @since 1.0.0

4
DataStorage/LockException.php
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@ -4,7 +4,7 @@
*
* PHP Version 7.1
*
* @package TBD
* @package phpOMS\DataStorage
* @copyright Dennis Eichhorn
* @license OMS License 1.0
* @version 1.0.0
@ -17,7 +17,7 @@ namespace phpOMS\DataStorage;
/**
* Permission exception class.
*
* @package Framework
* @package phpOMS\DataStorage
* @license OMS License 1.0
* @link http://website.orange-management.de
* @since 1.0.0

4
DataStorage/Session/HttpSession.php
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@ -4,7 +4,7 @@
*
* PHP Version 7.1
*
* @package TBD
* @package phpOMS\DataStorage\Session
* @copyright Dennis Eichhorn
* @license OMS License 1.0
* @version 1.0.0
@ -21,7 +21,7 @@ use phpOMS\DataStorage\LockException;
/**
* Http session class.
*
* @package Framework
* @package phpOMS\DataStorage\Session
* @license OMS License 1.0
* @link http://website.orange-management.de
* @since 1.0.0

143
tests/Business/Finance/FinanceFormulasTest.php
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@ -230,11 +230,6 @@ class FinanceFormulasTest extends \PHPUnit\Framework\TestCase
self::assertEquals($t, FinanceFormulas::getSimpleInterestTime($I, $P, $r));
}
public function testNetPresentValue()
{
self::assertTrue(abs(1009.23 - FinanceFormulas::getNetPresentValue([10000, 500, 1000, 1500, 2000, 2500, 3000, 3500], 0.05)) < 0.01);
}
public function testDiscountedPaybackPeriod()
{
$O1 = 5000;
@ -251,4 +246,142 @@ class FinanceFormulasTest extends \PHPUnit\Framework\TestCase
self::assertTrue(abs(14.207 - FinanceFormulas::getDoublingTime($r)) < 0.01);
self::assertTrue(abs($r - FinanceFormulas::getDoublingRate(14.207)) < 0.01);
}
public function testDoublingTimeContinuousCompounding()
{
$r = 0.05;
self::assertEquals(13.863, FinanceFormulas::getDoublingTimeContinuousCompounding($r), '', 0.01);
}
public function testEquivalentAnnualAnnuity()
{
$npv = 1000;
$r = 0.15;
$n = 7;
self::assertEquals(240.36, FinanceFormulas::getEquivalentAnnualAnnuity($npv, $r, $n), '', 0.01);
self::assertEquals($n, FinanceFormulas::getPeriodsOfEAA(240.36, $npv, $r));
self::assertEquals($npv, FinanceFormulas::getNetPresentValueOfEAA(240.36, $r, $n), '', 0.01);
}
public function testFreeCashFlowToEquity()
{
$income = 1000;
$depamo = 300;
$capital = 400;
$wc = 200;
$borrowing = 500;
self::assertEquals(1200, FinanceFormulas::getFreeCashFlowToEquity($income, $depamo, $capital, $wc, $borrowing), '', 0.01);
}
public function testFreeCashFlowToFirm()
{
$ebit = 1000;
$depamo = 300;
$t = 0.15;
$capital = 400;
$wc = 200;
self::assertEquals(550, FinanceFormulas::getFreeCashFlowToFirm($ebit, $t, $depamo, $capital, $wc), '', 0.01);
}
public function testFutureValue()
{
$c = 1000;
$r = 0.15;
$n = 7;
self::assertEquals(2660.02, FinanceFormulas::getFutureValue($c, $r, $n), '', 0.01);
}
public function testFutureValueContinuousCompounding()
{
$pv = 1000;
$r = 0.15;
$t = 7;
self::assertEquals(2857.65, FinanceFormulas::getFutureValueContinuousCompounding($pv, $r, $t), '', 0.01);
}
public function testFutureValueFactor()
{
$r = 0.15;
$n = 7;
self::assertEquals(2.66, FinanceFormulas::getFutureValueFactor($r, $n), '', 0.01);
}
public function testGeometricMeanReturn()
{
$r = [0.01, 0.02, 0.03, 0.04, 0.05, 0.06, 0.07];
self::assertEquals(0.04123, FinanceFormulas::getGeometricMeanReturn($r), '', 0.01);
}
public function testGrowingAnnuityFV()
{
$p = 1000;
$r = 0.15;
$g = 0.1;
$n = 7;
self::assertEquals(14226.06, FinanceFormulas::getGrowingAnnuityFV($p, $r, $g, $n), '', 0.01);
}
public function testGrowingAnnuityPaymentPV()
{
$p = 1000;
$r = 0.15;
$g = 0.1;
$n = 7;
self::assertEquals(186.98, FinanceFormulas::getGrowingAnnuityPaymentPV($p, $r, $g, $n), '', 0.01);
}
public function testGrowingAnnuityPaymentFV()
{
$fv = 1000;
$r = 0.15;
$g = 0.1;
$n = 7;
self::assertEquals(70.29, FinanceFormulas::getGrowingAnnuityPaymentFV($fv, $r, $g, $n), '', 0.01);
}
public function testGrowingAnnuityPV()
{
$p = 1000;
$r = 0.15;
$g = 0.1;
$n = 7;
self::assertEquals(5348.1, FinanceFormulas::getGrowingAnnuityPV($p, $r, $g, $n), '', 0.01);
}
public function testGrowingPerpetuityPV()
{
$d = 1000;
$r = 0.15;
$g = 0.1;
self::assertEquals(20000, FinanceFormulas::getGrowingPerpetuityPV($d, $r, $g), '', 0.01);
}
public function testNetPresentValue()
{
$c = [1000, 100, 200, 300, 400, 500, 600];
$r = 0.15;
self::assertEquals(172.13, FinanceFormulas::getNetPresentValue($c, $r), '', 0.01);
}
public function testRealRateOfReturn()
{
$nominal = 0.15;
$inflation = 0.05;
self::assertEquals(0.09524, FinanceFormulas::getRealRateOfReturn($nominal, $inflation), '', 0.01);
}
}

39
tests/Business/Finance/LoanTest.php
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@ -22,4 +22,43 @@ class LoanTest extends \PHPUnit\Framework\TestCase
self::assertEquals(100 / 50, Loan::getLoanToDepositRatio(100, 50));
self::assertEquals(100 / 50, Loan::getLoanToValueRatio(100, 50));
}
public function testPaymentsOnBalloonLoan()
{
$pv = 1000;
$r = 0.15;
$n = 7;
$balloon = 300;
self::assertEquals(213.25, Loan::getPaymentsOnBalloonLoan($pv, $r, $n, $balloon), '', 0.01);
}
public function testBalloonBalanceOfLoan()
{
$pv = 1000;
$p = 300;
$r = 0.15;
$n = 7;
self::assertEquals(-660.02, Loan::getBalloonBalanceOfLoan($pv, $p, $r, $n), '', 0.01);
}
public function testLoanPayment()
{
$pv = 1000;
$r = 0.15;
$n = 7;
self::assertEquals(240.36, Loan::getLoanPayment($pv, $r, $n), '', 0.01);
}
public function testRemainingBalanceLoan()
{
$pv = 1000;
$p = 200;
$r = 0.15;
$n = 7;
self::assertEquals(446.66, Loan::getRemainingBalanceLoan($pv, $p, $r, $n), '', 0.01);
}
}

16
tests/Business/Finance/StockBondsTest.php
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@ -50,4 +50,20 @@ class StockBondsTest extends \PHPUnit\Framework\TestCase
{
self::assertEquals(9.09, StockBonds::getDilutedEarningsPerShare(1000, 100, 10), '', 0.1);
}
public function testHoldingPeriodReturn()
{
$r = [0.01, 0.02, 0.03, 0.04];
self::assertEquals(0.10355, StockBonds::getHoldingPeriodReturn($r), '', 0.01);
}
public function testNetAssetValue()
{
$assets = 1000;
$liabilities = 300;
$shares = 400;
self::assertEquals(1.75, StockBonds::getNetAssetValue($assets, $liabilities, $shares), '', 0.01);
}
}