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Commit 74826de

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castarcocastarco
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Added some numerical constants
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‎src/NumConstants.php

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<?php
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namespace Litipk\BigNumbers;
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use Litipk\BigNumbers\Decimal as Decimal;
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/**
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* Static class that holds many important numeric constants
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*
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* @author Andreu Correa Casablanca <castarco@litipk.com>
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*/
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class NumConstants
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{
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private static $PI = null;
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private static $E = null;
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private static $EulerMascheroni = null;
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private static $GoldenRatio = null;
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private static $LightSpeed = null;
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/**
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* Private constructor
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*/
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private function __construct()
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{
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}
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/**
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* Private clone method
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*/
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private function __clone()
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{
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}
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/**
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* Returns the Pi number.
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*/
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public static function PI()
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{
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if (static::$PI === null) {
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static::$PI = Decimal::fromString(
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"3.14159265358979323846264338327950"
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);
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}
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return static::$PI;
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}
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/**
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* Returns the Euler's E number.
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*/
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public static function E()
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{
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if (static::$E === null) {
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static::$E = Decimal::fromString(
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"2.71828182845904523536028747135266"
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);
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}
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return static::$E;
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}
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/**
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* Returns the Euler-Mascheroni constant.
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*/
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public static function EulerMascheroni()
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{
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if (static::$EulerMascheroni === null) {
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static::$EulerMascheroni = Decimal::fromString(
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"0.57721566490153286060651209008240"
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);
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}
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return static::$EulerMascheroni;
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}
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/**
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* Returns the Golden Ration, also named Phi.
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*/
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public static function GoldenRatio()
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{
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if (static::$GoldenRatio === null) {
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static::$GoldenRatio = Decimal::fromString(
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"1.61803398874989484820458683436564"
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);
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}
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return static::$GoldenRatio;
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}
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/**
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* Returns the Light of Speed measured in meters / second.
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*/
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public static function LightSpeed()
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{
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if (static::$LightSpeed === null) {
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static::$LightSpeed = Decimal::fromInteger(299792458);
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}
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return static::$LightSpeed;
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}
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}

‎tests/Decimal/DecimalCeilTest.php

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<?php
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use Litipk\BigNumbers\Decimal as Decimal;
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date_default_timezone_set('UTC');
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class DecimalCeilTest extends PHPUnit_Framework_TestCase
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{
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public function testIntegerCeil()
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{
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$this->assertTrue(Decimal::fromFloat(0.00)->ceil()->isZero());
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$this->assertTrue(Decimal::fromFloat(0.00)->ceil()->equals(Decimal::fromInteger(0)));
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$this->assertFalse(Decimal::fromFloat(0.01)->ceil()->isZero());
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$this->assertFalse(Decimal::fromFloat(0.40)->ceil()->isZero());
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$this->assertFalse(Decimal::fromFloat(0.50)->ceil()->isZero());
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$this->assertTrue(Decimal::fromFloat(0.01)->ceil()->equals(Decimal::fromInteger(1)));
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$this->assertTrue(Decimal::fromFloat(0.40)->ceil()->equals(Decimal::fromInteger(1)));
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$this->assertTrue(Decimal::fromFloat(0.50)->ceil()->equals(Decimal::fromInteger(1)));
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}
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public function testCeilWithDecimals()
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{
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$this->assertTrue(Decimal::fromString('3.45')->ceil(1)->equals(Decimal::fromString('3.5')));
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$this->assertTrue(Decimal::fromString('3.44')->ceil(1)->equals(Decimal::fromString('3.5')));
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}
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public function testNoUsefulCeil()
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{
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$this->assertTrue(Decimal::fromString('3.45')->ceil(2)->equals(Decimal::fromString('3.45')));
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$this->assertTrue(Decimal::fromString('3.45')->ceil(3)->equals(Decimal::fromString('3.45')));
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}
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public function testInfiniteRound()
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{
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$pInf = Decimal::getPositiveInfinite();
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$nInf = Decimal::getNegativeInfinite();
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$this->assertTrue($pInf->ceil()->equals($pInf));
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$this->assertTrue($nInf->ceil()->equals($nInf));
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}
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}

‎tests/Decimal/DecimalFloorTest.php

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<?php
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use Litipk\BigNumbers\Decimal as Decimal;
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date_default_timezone_set('UTC');
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class DecimalFloorTest extends PHPUnit_Framework_TestCase
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{
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public function testIntegerFloor()
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{
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$this->assertTrue(Decimal::fromFloat(0.00)->floor()->isZero());
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$this->assertTrue(Decimal::fromFloat(0.00)->floor()->equals(Decimal::fromInteger(0)));
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$this->assertTrue(Decimal::fromFloat(0.01)->floor()->isZero());
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$this->assertTrue(Decimal::fromFloat(0.40)->floor()->isZero());
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$this->assertTrue(Decimal::fromFloat(0.50)->floor()->isZero());
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$this->assertTrue(Decimal::fromFloat(0.01)->floor()->equals(Decimal::fromInteger(0)));
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$this->assertTrue(Decimal::fromFloat(0.40)->floor()->equals(Decimal::fromInteger(0)));
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$this->assertTrue(Decimal::fromFloat(0.50)->floor()->equals(Decimal::fromInteger(0)));
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$this->assertTrue(Decimal::fromFloat(1.01)->floor()->equals(Decimal::fromInteger(1)));
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$this->assertTrue(Decimal::fromFloat(1.40)->floor()->equals(Decimal::fromInteger(1)));
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$this->assertTrue(Decimal::fromFloat(1.50)->floor()->equals(Decimal::fromInteger(1)));
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}
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public function testFloorWithDecimals()
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{
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$this->assertTrue(Decimal::fromString('3.45')->floor(1)->equals(Decimal::fromString('3.4')));
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$this->assertTrue(Decimal::fromString('3.44')->floor(1)->equals(Decimal::fromString('3.4')));
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}
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public function testNoUsefulFloor()
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{
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$this->assertTrue(Decimal::fromString('3.45')->floor(2)->equals(Decimal::fromString('3.45')));
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$this->assertTrue(Decimal::fromString('3.45')->floor(3)->equals(Decimal::fromString('3.45')));
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}
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public function testInfiniteRound()
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{
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$pInf = Decimal::getPositiveInfinite();
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$nInf = Decimal::getNegativeInfinite();
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$this->assertTrue($pInf->floor()->equals($pInf));
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$this->assertTrue($nInf->floor()->equals($nInf));
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}
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}

‎tests/NumConstantsTest.php

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<?php
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use Litipk\BigNumbers\NumConstants as NumConstants;
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use Litipk\BigNumbers\Decimal as Decimal;
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date_default_timezone_set('UTC');
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class NumConstantsTest extends PHPUnit_Framework_TestCase
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{
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public function testFiniteAbs()
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{
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$this->assertTrue(NumConstants::PI()->equals(
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Decimal::fromString("3.14159265358979323846264338327950")
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));
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$this->assertTrue(NumConstants::E()->equals(
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Decimal::fromString("2.71828182845904523536028747135266")
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));
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$this->assertTrue(NumConstants::EulerMascheroni()->equals(
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Decimal::fromString("0.57721566490153286060651209008240")
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));
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$this->assertTrue(NumConstants::GoldenRatio()->equals(
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Decimal::fromString("1.61803398874989484820458683436564")
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));
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$this->assertTrue(NumConstants::LightSpeed()->equals(
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Decimal::fromInteger(299792458)
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));
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}
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}

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