PhpSpreadsheet/tests/PhpSpreadsheetTests/Functional/AbstractFunctional.php

<?php

declare(strict_types=1);

namespace PhpOffice\PhpSpreadsheetTests\Functional;

use PhpOffice\PhpSpreadsheet\IOFactory;
use PhpOffice\PhpSpreadsheet\Shared\File;
use PhpOffice\PhpSpreadsheet\Spreadsheet;
use PHPUnit\Framework\TestCase;

/**
 * Base class for functional test to write and reload file on disk across different formats.
 */
abstract class AbstractFunctional extends TestCase
{
    /**
     * Write spreadsheet to disk, reload and return it.
     */
    protected function writeAndReload(Spreadsheet $spreadsheet, string $format, ?callable $readerCustomizer = null, ?callable $writerCustomizer = null): Spreadsheet
    {
        $filename = File::temporaryFilename();

        try {
            $writer = IOFactory::createWriter($spreadsheet, $format);
            if ($writerCustomizer) {
                $writerCustomizer($writer);
            }
            $writer->save($filename);

            $reader = IOFactory::createReader($format);
            if ($readerCustomizer) {
                $readerCustomizer($reader);
            }
            $reloadedSpreadsheet = $reader->load($filename);
        } finally {
            @unlink($filename);
        }

        return $reloadedSpreadsheet;
    }
}