From 7972f8b340816e85998cdb6b674ebd1830c8e11a Mon Sep 17 00:00:00 2001
From: Benedikt Franke <benedikt.franke@mll.com>
Date: Wed, 2 Sep 2026 15:06:28 +0200
Subject: [PATCH] Strip expected directory prefix with substr

PHPStan reported:

    src/AssertDirectory.php:55
    Parameter #1 $separator of function explode expects non-empty-string, string given.

Splitting on $expected was an indirect way to cut the prefix off the
iterated pathname. Since $expected is always that prefix, substr says
so directly and drops the non-empty-string requirement.
---
 src/AssertDirectory.php | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/AssertDirectory.php b/src/AssertDirectory.php
index 3c97866..a4329e8 100644
--- a/src/AssertDirectory.php
+++ b/src/AssertDirectory.php
@@ -52,7 +52,7 @@ private static function assertDirectoryContainsContents(string $expected, string
         foreach ($iterator as $fileInfo) {
             assert($fileInfo instanceof \SplFileInfo);
             $expectedPathname = $fileInfo->getPathname();
-            $actualPathname = $actual . explode($expected, $expectedPathname, 2)[1];
+            $actualPathname = $actual . substr($expectedPathname, strlen($expected));
 
             if ($fileInfo->isDir()) {
                 Assert::assertDirectoryExists($actualPathname, $message);