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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 specified subset.
*
* Uses array_replace_recursive() to check if a key value subset is part of the
* subject array.
*/
class PHPUnit_Framework_Constraint_ArraySubset extends PHPUnit_Framework_Constraint
{
/**
* @var array|Traversable
*/
protected $subset;
/**
* @var bool
*/
protected $strict;
/**
* @param array|Traversable $subset
* @param bool $strict Check for object identity
*/
public function __construct($subset, $strict = false)
{
parent::__construct();
$this->strict = $strict;
$this->subset = $subset;
}
/**
* Evaluates the constraint for parameter $other. Returns true if the
* constraint is met, false otherwise.
*
* @param array|Traversable $other Array or Traversable object to evaluate.
*
* @return bool
*/
protected function matches($other)
{
//type cast $other & $this->subset as an array to allow
//support in standard array functions.
$other = $this->toArray($other);
$this->subset = $this->toArray($this->subset);
$patched = array_replace_recursive($other, $this->subset);
if ($this->strict) {
return $other === $patched;
} else {
return $other == $patched;
}
}
/**
* Returns a string representation of the constraint.
*
* @return string
*/
public function toString()
{
return 'has the subset ' . $this->exporter->export($this->subset);
}
/**
* 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();
}
/**
* @param array|Traversable $other
*
* @return array
*/
private function toArray($other)
{
if (is_array($other)) {
return $other;
} elseif ($other instanceof ArrayObject) {
return $other->getArrayCopy();
} elseif ($other instanceof Traversable) {
return iterator_to_array($other);
}
// Keep BC even if we know that array would not be the expected one
return (array) $other;
}
}
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