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<?php
declare(strict_types=1);
/*
* This file is part of the league/commonmark package.
*
* (c) Colin O'Dell <colinodell@gmail.com>
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
namespace League\CommonMark\Util;
use League\CommonMark\Exception\IOException;
/**
* Reads in a CommonMark spec document and extracts the input/output examples for testing against them
*/
final class SpecReader
{
private function __construct()
{
}
/**
* @return iterable<string, array{input: string, output: string, type: string, section: string, number: int}>
*/
public static function read(string $data): iterable
{
// Normalize newlines for platform independence
$data = \preg_replace('/\r\n?/', "\n", $data);
\assert($data !== null);
$data = \preg_replace('/<!-- END TESTS -->.*$/', '', $data);
\assert($data !== null);
\preg_match_all('/^`{32} (example ?\w*)\n([\s\S]*?)^\.\n([\s\S]*?)^`{32}$|^#{1,6} *(.*)$/m', $data, $matches, PREG_SET_ORDER);
$currentSection = 'Example';
$exampleNumber = 0;
foreach ($matches as $match) {
if (isset($match[4])) {
$currentSection = $match[4];
continue;
}
yield \trim($currentSection . ' #' . $exampleNumber) => [
'input' => \str_replace('→', "\t", $match[2]),
'output' => \str_replace('→', "\t", $match[3]),
'type' => $match[1],
'section' => $currentSection,
'number' => $exampleNumber++,
];
}
}
/**
* @return iterable<string, array{input: string, output: string, type: string, section: string, number: int}>
*
* @throws IOException if the file cannot be loaded
*/
public static function readFile(string $filename): iterable
{
if (($data = \file_get_contents($filename)) === false) {
throw new IOException(\sprintf('Failed to load spec from %s', $filename));
}
return self::read($data);
}
}