File.php

<?php
/**
 * Copyright © Magento, Inc. All rights reserved.
 * See COPYING.txt for license details.
 */

namespace Magento\FunctionalTestingFramework\Util\Iterator;

/**
 * Class File
 *
 * @api
 */
class File extends AbstractIterator
{
    /**
     * Cached files content
     *
     * @var array
     */
    protected $cached = [];

    /**
     * File constructor.
     * @param array $paths
     */
    public function __construct(array $paths)
    {
        $this->data = $paths;
        $this->initFirstElement();
    }

    /**
     * Return filename of current file object
     *
     * @return string
     */
    public function getFilename()
    {
        return $this->data[$this->key()];
    }

    /**
     * Get file content
     *
     * @return string
     */
    public function current()
    {
        if (!isset($this->cached[$this->current])) {
            $this->cached[$this->current] = file_get_contents($this->current);
        }
        return $this->cached[$this->current];
    }

    /**
     * Check if current element is valid
     *
     * @return boolean
     */
    protected function isValid()
    {
        return true;
    }
}