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<?php
use Litipk\BigNumbers\Decimal as Decimal;
date_default_timezone_set('UTC');
class DecimalLog10Test extends PHPUnit_Framework_TestCase
{
public function testZeroLog10()
$zero = Decimal::fromInteger(0);
$zero_log = $zero->log10();
$this->assertTrue($zero_log->isNegative());
$this->assertTrue($zero_log->isInfinite());
}
/**
* @expectedException \DomainException
* @expectedExceptionMessage Decimal can't handle logarithms of negative numbers (it's only for real numbers).
*/
public function testNegativeLog10()
Decimal::fromInteger(-1)->log10();
public function testBigNumbersLog10()
$bignumber = Decimal::fromString(bcpow('10', '2417'));
$pow = Decimal::fromInteger(2417);
$this->assertTrue($bignumber->log10()->equals($pow));
public function testLittleNumbersLog10()
$littlenumber = Decimal::fromString(bcpow('10', '-2417', 2417));
$pow = Decimal::fromInteger(-2417);
$this->assertTrue($littlenumber->log10()->equals($pow));
public function testMediumNumbersLog10()
$this->assertTrue(Decimal::fromInteger(75)->log10(5)->equals(Decimal::fromString('1.87506')));
$this->assertTrue(Decimal::fromInteger(49)->log10(7)->equals(Decimal::fromString('1.6901961')));
Litipk /
php-bignumbers
