vendor/phpunit/php-code-coverage/src/CodeCoverage/Report/XML.php

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<?php
/*
 * This file is part of the PHP_CodeCoverage package.
 *
 * (c) Sebastian Bergmann <sebastian@phpunit.de>
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */

/**
 * @since Class available since Release 2.0.0
 */
class PHP_CodeCoverage_Report_XML
{
    /**
     * @var string
     */
    private $target;

    /**
     * @var PHP_CodeCoverage_Report_XML_Project
     */
    private $project;

    public function process(PHP_CodeCoverage $coverage, $target)
    {
        if (substr($target, -1, 1) != DIRECTORY_SEPARATOR) {
            $target .= DIRECTORY_SEPARATOR;
        }

        $this->target = $target;
        $this->initTargetDirectory($target);

        $report = $coverage->getReport();

        $this->project = new PHP_CodeCoverage_Report_XML_Project(
            $coverage->getReport()->getName()
        );

        $this->processTests($coverage->getTests());
        $this->processDirectory($report, $this->project);

        $index                     = $this->project->asDom();
        $index->formatOutput       = true;
        $index->preserveWhiteSpace = false;
        $index->save($target . '/index.xml');
    }

    private function initTargetDirectory($dir)
    {
        if (file_exists($dir)) {
            if (!is_dir($dir)) {
                throw new PHP_CodeCoverage_Exception(
                    "'$dir' exists but is not a directory."
                );
            }

            if (!is_writable($dir)) {
                throw new PHP_CodeCoverage_Exception(