wip

Author: michalsn

system/Test/CIUnitTestCase.php

@@ -234,12 +234,15 @@ public static function setUpBeforeClass(): void
     {
         parent::setUpBeforeClass();
 
-        // Pre-load MockCodeIgniter (and its parent CodeIgniter\CodeIgniter) while
-        // the autoloader is still in its bootstrap state. This ensures both classes
-        // are in PHP's class registry before any setUp() call re-initializes the
-        // autoloader, preventing sporadic "Class not found" errors on the first test
-        // in a randomly-ordered run.
-        class_exists(MockCodeIgniter::class, true);
+        // Pre-load MockCodeIgniter and its parent CodeIgniter\CodeIgniter while the
+        // autoloader is still in its bootstrap state. This prevents sporadic
+        // "Class not found" / "Failed to open stream" errors on the first test in a
+        // randomly-ordered run that occur when Composer's PSR-4 fallback uses a
+        // vendor/composer/../../system path that fails to open in some CI environments.
+        // Explicit require_once with SYSTEMPATH bypasses both the classmap and PSR-4
+        // fallback entirely, using the absolute realpath set during bootstrap.
+        require_once SYSTEMPATH . 'CodeIgniter.php';
+        require_once SYSTEMPATH . 'Test/Mock/MockCodeIgniter.php';
 
         helper(['url', 'test']);
     }