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<?php declare(strict_types=1);
/*
* This file is part of PHPUnit.
*
* (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 PHPUnit\Framework\Constraint;
use function sprintf;
use function trim;
use PHPUnit\Framework\ExpectationFailedException;
use SebastianBergmann\Comparator\ComparisonFailure;
use SebastianBergmann\Comparator\Factory as ComparatorFactory;
/**
* @no-named-arguments Parameter names are not covered by the backward compatibility promise for PHPUnit
*/
final class IsEqualWithDelta extends Constraint
{
/**
* @var mixed
*/
private $value;
/**
* @var float
*/
private $delta;
public function __construct($value, float $delta)
{
$this->value = $value;
$this->delta = $delta;
}
/**
* Evaluates the constraint for parameter $other.
*
* If $returnResult is set to false (the default), an exception is thrown
* in case of a failure. null is returned otherwise.
*
* If $returnResult is true, the result of the evaluation is returned as
* a boolean value instead: true in case of success, false in case of a
* failure.
*
* @throws ExpectationFailedException
*/
public function evaluate($other, string $description = '', bool $returnResult = false): ?bool
{
// If $this->value and $other are identical, they are also equal.
// This is the most common path and will allow us to skip
// initialization of all the comparators.
if ($this->value === $other) {
return true;
}
$comparatorFactory = ComparatorFactory::getInstance();
try {
$comparator = $comparatorFactory->getComparatorFor(
$this->value,
$other
);
$comparator->assertEquals(
$this->value,
$other,
$this->delta
);
} catch (ComparisonFailure $f) {
if ($returnResult) {
return false;
}
throw new ExpectationFailedException(
trim($description . "\n" . $f->getMessage()),
$f
);
}
return true;
}
/**
* Returns a string representation of the constraint.
*
* @throws \SebastianBergmann\RecursionContext\InvalidArgumentException
*/
public function toString(): string
{
return sprintf(
'is equal to %s with delta <%F>>',
$this->exporter()->export($this->value),
$this->delta
);
}
}