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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.
*/
namespace PHPUnit\Framework\Constraint;
use PHPUnit\Framework\ExpectationFailedException;
/**
* Logical XOR.
*/
class LogicalXor extends Constraint
{
/**
* @var Constraint[]
*/
protected $constraints = [];
public static function fromConstraints(Constraint ...$constraints): self
{
$constraint = new self;
$constraint->constraints = \array_values($constraints);
return $constraint;
}
/**
* @param Constraint[] $constraints
*/
public function setConstraints(array $constraints)
{
$this->constraints = [];
foreach ($constraints as $constraint) {
if (!($constraint instanceof Constraint)) {
$constraint = new IsEqual(
$constraint
);
}
$this->constraints[] = $constraint;
}
}
/**
* 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.
*
* @param mixed $other Value or object to evaluate.
* @param string $description Additional information about the test
* @param bool $returnResult Whether to return a result or throw an exception
*
* @return mixed
*
* @throws ExpectationFailedException
*/
public function evaluate($other, $description = '', $returnResult = false)
{
$success = true;
$lastResult = null;
$constraint = null;
foreach ($this->constraints as $constraint) {
$result = $constraint->evaluate($other, $description, true);
if ($result === $lastResult) {
$success = false;
break;
}
$lastResult = $result;
}
if ($returnResult) {
return $success;
}
if (!$success) {
$this->fail($other, $description);
}
}
/**
* Returns a string representation of the constraint.
*
* @return string
*/
public function toString()
{
$text = '';
foreach ($this->constraints as $key => $constraint) {
if ($key > 0) {
$text .= ' xor ';
}
$text .= $constraint->toString();
}
return $text;
}
/**
* Counts the number of constraint elements.
*
* @return int
*/
public function count()
{
$count = 0;
foreach ($this->constraints as $constraint) {
$count += \count($constraint);
}
return $count;
}
}