[Backport stable27] fix: Allow dynamic autoloading for classes added during upgrade

composer.json

@@ -13,7 +13,6 @@
     },
     "config": {
         "optimize-autoloader": true,
-        "classmap-authoritative": true,
         "platform": {
 			"php": "8.0"
 		},

tests/Integration/Composer/AutoloaderTest.php

@@ -0,0 +1,60 @@
+<?php
+
+declare(strict_types=1);
+
+/**
+ * @copyright Copyright (c) 2023 Robin Windey <[email protected]>
+ *
+ *  @license GNU AGPL version 3 or any later version
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+namespace OCA\WorkflowOcr\Tests\Integration\Composer;
+
+use OCP\Security\ISecureRandom;
+use OCP\Server;
+use Test\TestCase;
+
+class AutoloaderTest extends TestCase {
+	/** @var null|string */
+	private $testClass = null;
+
+	private static function getClassPath(string $class): string {
+		return __DIR__ . '/../../../lib/' . $class . '.php';
+	}
+
+	protected function tearDown(): void {
+		parent::tearDown();
+
+		if ($this->testClass !== null && file_exists(self::getClassPath($this->testClass))) {
+			unlink(self::getClassPath($this->testClass));
+		}
+	}
+
+	public function testLoadDynamicClass(): void {
+		$rand = Server::get(ISecureRandom::class);
+		$className = ucfirst($rand->generate(10, ISecureRandom::CHAR_LOWER));
+		$namespace = "OCA\\WorkflowOcr";
+
+		file_put_contents(self::getClassPath($className), <<<FILE
+<?php
+namespace $namespace;
+class $className {}
+FILE);
+		$this->testClass = $className;
+
+		$this->assertTrue(class_exists($namespace . '\\' . $className));
+	}
+}