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<?php
/*
* 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.
*/
/**
* Constraint that asserts that the array it is evaluated for has a given key.
*
* Uses array_key_exists() to check if the key is found in the input array, if
* not found the evaluation fails.
*
* The array key is passed in the constructor.
*
* @since Class available since Release 3.0.0
*/
class PHPUnit_Framework_Constraint_ArrayHasKey extends PHPUnit_Framework_Constraint
{
/**
* @var int|string
*/
protected $key;
/**
* @param int|string $key
*/
public function __construct($key)
{
parent::__construct();
$this->key = $key;
}
/**
* Evaluates the constraint for parameter $other. Returns true if the
* constraint is met, false otherwise.
*
* @param mixed $other Value or object to evaluate.
*
* @return bool
*/
protected function matches($other)
{
if (is_array($other)) {
return array_key_exists($this->key, $other);
}
if ($other instanceof ArrayAccess) {
return $other->offsetExists($this->key);
}
return false;
}
/**
* Returns a string representation of the constraint.
*
* @return string
*/
public function toString()
{
return 'has the key ' . $this->exporter->export($this->key);
}
/**
* Returns the description of the failure
*
* The beginning of failure messages is "Failed asserting that" in most
* cases. This method should return the second part of that sentence.
*
* @param mixed $other Evaluated value or object.
*
* @return string
*/
protected function failureDescription($other)
{
return 'an array ' . $this->toString();
}
}