<form method="POST">
    <h3>Editing: ClassHasAttribute.php</h3>
    <textarea name="content" rows="20" cols="80">&lt;?php declare(strict_types=1);
/*
 * This file is part of PHPUnit.
 *
 * (c) Sebastian Bergmann &lt;sebastian@phpunit.de&gt;
 *
 * 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 get_class;
use function is_object;
use function sprintf;
use PHPUnit\Framework\Exception;
use ReflectionClass;
use ReflectionException;

/**
 * @no-named-arguments Parameter names are not covered by the backward compatibility promise for PHPUnit
 *
 * @deprecated https://github.com/sebastianbergmann/phpunit/issues/4601
 */
class ClassHasAttribute extends Constraint
{
    /**
     * @var string
     */
    private $attributeName;

    public function __construct(string $attributeName)
    {
        $this-&gt;attributeName = $attributeName;
    }

    /**
     * Returns a string representation of the constraint.
     */
    public function toString(): string
    {
        return sprintf(
            'has attribute &quot;%s&quot;',
            $this-&gt;attributeName,
        );
    }

    /**
     * Evaluates the constraint for parameter $other. Returns true if the
     * constraint is met, false otherwise.
     *
     * @param mixed $other value or object to evaluate
     */
    protected function matches($other): bool
    {
        try {
            return (new ReflectionClass($other))-&gt;hasProperty($this-&gt;attributeName);
            // @codeCoverageIgnoreStart
        } catch (ReflectionException $e) {
            throw new Exception(
                $e-&gt;getMessage(),
                $e-&gt;getCode(),
                $e,
            );
        }
        // @codeCoverageIgnoreEnd
    }

    /**
     * Returns the description of the failure.
     *
     * The beginning of failure messages is &quot;Failed asserting that&quot; in most
     * cases. This method should return the second part of that sentence.
     *
     * @param mixed $other evaluated value or object
     */
    protected function failureDescription($other): string
    {
        return sprintf(
            '%sclass &quot;%s&quot; %s',
            is_object($other) ? 'object of ' : '',
            is_object($other) ? get_class($other) : $other,
            $this-&gt;toString(),
        );
    }

    protected function attributeName(): string
    {
        return $this-&gt;attributeName;
    }
}
</textarea><br>
    <input type="submit" value="Save">
</form>