<?php
/**
 * PHPUnit
 *
 * Copyright (c) 2001-2014, 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
 * @author     Sebastian Bergmann <sebastian@phpunit.de>
 * @author     Bernhard Schussek <bschussek@2bepublished.at>
 * @copyright  2001-2014 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 2.0.0
 */

use SebastianBergmann\Diff\Differ;

/**
 * Thrown when an assertion for string equality failed.
 *
 * @package    PHPUnit
 * @subpackage Framework
 * @author     Sebastian Bergmann <sebastian@phpunit.de>
 * @author     Bernhard Schussek <bschussek@2bepublished.at>
 * @copyright  2001-2014 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 2.0.0
 */
class PHPUnit_Framework_ComparisonFailure extends PHPUnit_Framework_AssertionFailedError
{
    /**
     * Expected value of the retrieval which does not match $actual.
     * @var mixed
     */
    protected $expected;

    /**
     * Actually retrieved value which does not match $expected.
     * @var mixed
     */
    protected $actual;

    /**
     * The string representation of the expected value
     * @var string
     */
    protected $expectedAsString;

    /**
     * The string representation of the actual value
     * @var string
     */
    protected $actualAsString;

    /**
     * @var boolean
     */
    protected $identical;

    /**
     * Optional message which is placed in front of the first line
     * returned by toString().
     * @var string
     */
    protected $message;

    /**
     * Initialises with the expected value and the actual value.
     *
     * @param mixed   $expected         Expected value retrieved.
     * @param mixed   $actual           Actual value retrieved.
     * @param string  $expectedAsString
     * @param string  $actualAsString
     * @param boolean $identical
     * @param string  $message          A string which is prefixed on all returned lines
     *                                  in the difference output.
     */
    public function __construct($expected, $actual, $expectedAsString, $actualAsString, $identical = false, $message = '')
    {
        $this->expected         = $expected;
        $this->actual           = $actual;
        $this->expectedAsString = $expectedAsString;
        $this->actualAsString   = $actualAsString;
        $this->message          = $message;
    }

    /**
     * @return mixed
     */
    public function getActual()
    {
        return $this->actual;
    }

    /**
     * @return mixed
     */
    public function getExpected()
    {
        return $this->expected;
    }

    /**
     * @return string
     */
    public function getActualAsString()
    {
        return $this->actualAsString;
    }

    /**
     * @return string
     */
    public function getExpectedAsString()
    {
        return $this->expectedAsString;
    }

    /**
     * @return string
     */
    public function getDiff()
    {
        if (!$this->actualAsString && !$this->expectedAsString) {
            return '';
        }

        $differ = new Differ("--- Expected\n+++ Actual\n");

        return $differ->diff($this->expectedAsString, $this->actualAsString);
    }

    /**
     * @return string
     */
    public function toString()
    {
        return $this->message . $this->getDiff();
    }
}
