<?php
/*
* This file is part of sebastian/comparator.
*
* (c) Sebastian Bergmann <sebastian@phpunit.de>
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/

namespace SebastianBergmann\Comparator;

/**
* Compares doubles for equality.
*/
class DoubleComparator extends NumericComparator
{
/**
* Smallest value available in PHP.
*
* @var float
*/
const EPSILON = 0.0000000001;

/**
* Returns whether the comparator can compare two values.
*
* @param mixed $expected The first value to compare
* @param mixed $actual The second value to compare
*
* @return bool
*/
public function accepts($expected, $actual)
{
return (\is_float($expected) || \is_float($actual)) && \is_numeric($expected) && \is_numeric($actual);
}

/**
* Asserts that two values are equal.
*
* @param mixed $expected First value to compare
* @param mixed $actual Second value to compare
* @param float $delta Allowed numerical distance between two values to consider them equal
* @param bool $canonicalize Arrays are sorted before comparison when set to true
* @param bool $ignoreCase Case is ignored when set to true
*
* @throws ComparisonFailure
*/
public function assertEquals($expected, $actual, $delta = 0.0, $canonicalize = false, $ignoreCase = false)
{
if ($delta == 0) {
$delta = self::EPSILON;
}

parent::assertEquals($expected, $actual, $delta, $canonicalize, $ignoreCase);
}
}