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<?php declare(strict_types=1);
/*
* This file is part of sebastian/comparator.
*
* (c) Sebastian Bergmann <[email protected]>
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
namespace SebastianBergmann\Comparator;
use function abs;
use function is_float;
use function is_infinite;
use function is_nan;
use function is_numeric;
use function is_string;
use function sprintf;
/**
* Compares numerical values for equality.
*/
class NumericComparator extends ScalarComparator
{
/**
* 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, $actual)
{
// all numerical values, but not if one of them is a double
// or both of them are strings
return is_numeric($expected) && is_numeric($actual) &&
!(is_float($expected) || is_float($actual)) &&
!(is_string($expected) && is_string($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, $ignoreCase = false)/*: void*/
{
if ($this->isInfinite($actual) && $this->isInfinite($expected)) {
return;
}
if (($this->isInfinite($actual) xor $this->isInfinite($expected)) ||
($this->isNan($actual) || $this->isNan($expected)) ||
abs($actual - $expected) > $delta) {
throw new ComparisonFailure(
$expected,
$actual,
'',
'',
false,
sprintf(
'Failed asserting that %s matches expected %s.',
$this->exporter->export($actual),
$this->exporter->export($expected)
)
);
}
}
private function isInfinite($value): bool
{
return is_float($value) && is_infinite($value);
}
private function isNan($value): bool
{
return is_float($value) && is_nan($value);
}
}
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