php/external/PHPUnit/Framework/Constraint/Xor.php

<?php
/**
 * PHPUnit
 *
 * Copyright (c) 2002-2008, Sebastian Bergmann <sb@sebastian-bergmann.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.
 *
 * @category   Testing
 * @package    PHPUnit
 * @author     Jan Borsodi <jb@ez.no>
 * @author     Sebastian Bergmann <sb@sebastian-bergmann.de>
 * @copyright  2002-2008 Sebastian Bergmann <sb@sebastian-bergmann.de>
 * @license    http://www.opensource.org/licenses/bsd-license.php  BSD License
 * @version    SVN: $Id: Xor.php 1985 2007-12-26 18:11:55Z sb $
 * @link       http://www.phpunit.de/
 * @since      File available since Release 3.0.0
 */

require_once 'PHPUnit/Framework.php';
require_once 'PHPUnit/Util/Filter.php';
require_once 'PHPUnit/Util/Type.php';

PHPUnit_Util_Filter::addFileToFilter(__FILE__, 'PHPUNIT');

/**
 * Logical XOR.
 *
 * @category   Testing
 * @package    PHPUnit
 * @author     Sebastian Bergmann <sb@sebastian-bergmann.de>
 * @copyright  2002-2008 Sebastian Bergmann <sb@sebastian-bergmann.de>
 * @license    http://www.opensource.org/licenses/bsd-license.php  BSD License
 * @version    Release: 3.2.9
 * @link       http://www.phpunit.de/
 * @since      Class available since Release 3.0.0
 */
class PHPUnit_Framework_Constraint_Xor extends PHPUnit_Framework_Constraint {
  protected $constraints = array();

  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. Returns TRUE if the
   * constraint is met, FALSE otherwise.
   *
   * @param mixed $other Value or object to evaluate.
   * @return bool
   */
  public function evaluate($other) {
    $result = FALSE;
    
    foreach ($this->constraints as $constraint) {
      if ($constraint->evaluate($other)) {
        if ($result) {
          return FALSE;
        }
        
        $result = TRUE;
      }
    }
    
    return $result;
  }

  /**
   * @param   mixed   $other The value passed to evaluate() which failed the
   *                         constraint check.
   * @param   string  $description A string with extra description of what was
   *                               going on while the evaluation failed.
   * @param   boolean $not Flag to indicate negation.
   * @throws  PHPUnit_Framework_ExpectationFailedException
   */
  public function fail($other, $description, $not = FALSE) {
    throw new PHPUnit_Framework_ExpectationFailedException(sprintf('Failed asserting that %s.', 

    $this->toString(), NULL, $description));
  }

  /**
   * Returns a string representation of the constraint.
   *
   * @return string
   * @access public
   */
  public function toString() {
    $text = '';
    
    foreach ($this->constraints as $key => $constraint) {
      if ($key > 0) {
        $text .= ' xor ';
      }
      
      $text .= $constraint->toString();
    }
    
    return $text;
  }
}
?>