Test if neons have same keys

TestNeonSynchronizer.php

<?php

declare(strict_types=1);

namespace UnitTests\Utils;

require_once __DIR__ . '/../../../bootstrap.php';

use Nette\Neon\Neon;
use Tester\Assert;
use Tester\TestCase;

final class NeonSynchronizerTest extends TestCase
{
	private $filesToTest = [
		__DIR__ . '/../../../../src/config/config.local.example.neon',
		__DIR__ . '/../../../../src/config/config.devel.neon',
//		__DIR__ . '/../../../../src/config/config.production.neon',
		__DIR__ . '/../../../config/config.test.neon',
	];


	public function testIfNeonFilesHaveSameKeys(): void
	{
		foreach ($this->filesToTest as $fileA) {
			foreach ($this->filesToTest as $fileB) {
				if ($fileA === $fileB) {
					continue;
				}

				$configFromFileA = Neon::decode(file_get_contents($fileA));
				$configFromFileB = Neon::decode(file_get_contents($fileB));

				$arrayKeysA = $this->array_keys_inner('', $configFromFileA);
				$arrayKeysB = $this->array_keys_inner('', $configFromFileB);

				$diff = array_diff($arrayKeysA, $arrayKeysB);

				Assert::noError(function () use ($diff, $fileA, $fileB) {
					if ($diff !== []) {
						$fileObjectA = new \SplFileInfo($fileA);
						$fileObjectB = new \SplFileInfo($fileB);

						$diffAsString = implode(', ', $diff);

						Assert::fail(sprintf(
							'%s and %s do not have same keys, diff: %s',
							$fileObjectA->getBasename(),
							$fileObjectB->getBasename(),
							$diffAsString
						));
					}
				});
			}
		}
	}


	private function array_keys_inner($prefix, $array)
	{
		$resultArr = [];

		foreach ($array as $key => $subArr) {
			if (is_array($subArr)) {
				$stringKey = ($prefix !== '') ? sprintf('%s.%s', $prefix, $key) : $key;

				$resultArr = array_merge($resultArr, $this->array_keys_inner($stringKey, $subArr));
			}

			$resultArr[] = sprintf('%s.%s', $prefix, $key);
		}

		return $resultArr;
	}

}

(new NeonSynchronizerTest())->run();