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<?php
/**
* PHPUnit
*
* Copyright (c) 2001-2013, Sebastian Bergmann <sebastian@phpunit.de>.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* * Neither the name of Sebastian Bergmann nor the names of his
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
* @package PHPUnit
* @subpackage Framework_Constraint
* @author Sebastian Bergmann <sebastian@phpunit.de>
* @author Bernhard Schussek <bschussek@2bepublished.at>
* @copyright 2001-2013 Sebastian Bergmann <sebastian@phpunit.de>
* @license http://www.opensource.org/licenses/BSD-3-Clause The BSD 3-Clause License
* @link http://www.phpunit.de/
* @since File available since Release 3.0.0
*/
/**
* Logical XOR.
*
* @package PHPUnit
* @subpackage Framework_Constraint
* @author Sebastian Bergmann <sebastian@phpunit.de>
* @author Bernhard Schussek <bschussek@2bepublished.at>
* @copyright 2001-2013 Sebastian Bergmann <sebastian@phpunit.de>
* @license http://www.opensource.org/licenses/BSD-3-Clause The BSD 3-Clause License
* @link http://www.phpunit.de/
* @since Class available since Release 3.0.0
*/
class PHPUnit_Framework_Constraint_Xor extends PHPUnit_Framework_Constraint
{
/**
* @var PHPUnit_Framework_Constraint[]
*/
protected $constraints = array();
/**
* @param PHPUnit_Framework_Constraint[] $constraints
*/
public function setConstraints(array $constraints)
{
$this->constraints = array();
foreach ($constraints as $key => $constraint) {
if (!($constraint instanceof PHPUnit_Framework_Constraint)) {
$constraint = new PHPUnit_Framework_Constraint_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 $returnResult Whether to return a result or throw an exception
* @return mixed
* @throws PHPUnit_Framework_ExpectationFailedException
*/
public function evaluate($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 integer
* @since Method available since Release 3.4.0
*/
public function count()
{
$count = 0;
foreach ($this->constraints as $constraint) {
$count += count($constraint);
}
return $count;
}
}
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