<?php
/**
 * PHPUnit
 *
 * Copyright (c) 2010-2014, 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_MockObject
 * @author     Sebastian Bergmann <sebastian@phpunit.de>
 * @copyright  2010-2014 Sebastian Bergmann <sebastian@phpunit.de>
 * @license    http://www.opensource.org/licenses/BSD-3-Clause  The BSD 3-Clause License
 * @link       http://github.com/sebastianbergmann/phpunit-mock-objects
 * @since      File available since Release 1.0.0
 */

/**
 * Invocation matcher which checks if a method was invoked at a certain index.
 *
 * If the expected index number does not match the current invocation index it
 * will not match which means it skips all method and parameter matching. Only
 * once the index is reached will the method and parameter start matching and
 * verifying.
 *
 * If the index is never reached it will throw an exception in index.
 *
 * @package    PHPUnit_MockObject
 * @author     Sebastian Bergmann <sebastian@phpunit.de>
 * @copyright  2010-2014 Sebastian Bergmann <sebastian@phpunit.de>
 * @license    http://www.opensource.org/licenses/BSD-3-Clause  The BSD 3-Clause License
 * @version    Release: @package_version@
 * @link       http://github.com/sebastianbergmann/phpunit-mock-objects
 * @since      Class available since Release 1.0.0
 */
class PHPUnit_Framework_MockObject_Matcher_InvokedAtIndex implements PHPUnit_Framework_MockObject_Matcher_Invocation
{
    /**
     * @var integer
     */
    protected $sequenceIndex;

    /**
     * @var integer
     */
    protected $currentIndex = -1;

    /**
     * @param integer $sequenceIndex
     */
    public function __construct($sequenceIndex)
    {
        $this->sequenceIndex = $sequenceIndex;
    }

    /**
     * @return string
     */
    public function toString()
    {
        return 'invoked at sequence index ' . $this->sequenceIndex;
    }

    /**
     * @param  PHPUnit_Framework_MockObject_Invocation $invocation
     * @return boolean
     */
    public function matches(PHPUnit_Framework_MockObject_Invocation $invocation)
    {
        $this->currentIndex++;

        return $this->currentIndex == $this->sequenceIndex;
    }

    /**
     * @param PHPUnit_Framework_MockObject_Invocation $invocation
     */
    public function invoked(PHPUnit_Framework_MockObject_Invocation $invocation)
    {
    }

    /**
     * Verifies that the current expectation is valid. If everything is OK the
     * code should just return, if not it must throw an exception.
     *
     * @throws PHPUnit_Framework_ExpectationFailedException
     */
    public function verify()
    {
        if ($this->currentIndex < $this->sequenceIndex) {
            throw new PHPUnit_Framework_ExpectationFailedException(
              sprintf(
                'The expected invocation at index %s was never reached.',

                $this->sequenceIndex
              )
            );
        }
    }
}
