<?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 Closure;
use ReflectionFunction;
/**
* @psalm-template CallbackInput of mixed
*
* @no-named-arguments Parameter names are not covered by the backward compatibility promise for PHPUnit
*/
final class Callback extends Constraint
{
/**
* @psalm-var callable(CallbackInput $input): bool
*/
private readonly mixed $callback;
/**
* @psalm-param callable(CallbackInput $input): bool $callback
*/
public function __construct(callable $callback)
{
$this->callback = $callback;
}
/**
* Returns a string representation of the constraint.
*/
public function toString(): string
{
return 'is accepted by specified callback';
}
/**
* @psalm-suppress ArgumentTypeCoercion
*/
public function isVariadic(): bool
{
foreach ((new ReflectionFunction(Closure::fromCallable($this->callback)))->getParameters() as $parameter) {
if ($parameter->isVariadic()) {
return true;
}
}
return false;
}
/**
* Evaluates the constraint for parameter $value. Returns true if the
* constraint is met, false otherwise.
*
* @psalm-param CallbackInput $other
*
* @psalm-suppress InvalidArgument
*/
protected function matches(mixed $other): bool
{
if ($this->isVariadic()) {
return ($this->callback)(...$other);
}
return ($this->callback)($other);
}
}