Fix missing TinyMCE license files + tests

composer.json

@@ -36,7 +36,7 @@
         "magento-hackathon/magento-composer-installer": "^3.1 || ^2.1 || ^4.0",
         "mklkj/tinymce-i18n": "^25.2",
         "nnnick/chartjs": "^4.4",
-        "openmage/composer-plugin": "^3.0",
+        "openmage/composer-plugin": "^3.1",
         "pelago/emogrifier": "^8.0",
         "phpseclib/mcrypt_compat": "^2.0.3",
         "phpseclib/phpseclib": "^3.0.14",

tests/unit/Base/TinyMCELicenseTest.php

@@ -0,0 +1,53 @@
+<?php
+
+/**
+ * @copyright  For copyright and license information, read the COPYING.txt file.
+ * @link       /COPYING.txt
+ * @license    Open Software License (OSL 3.0)
+ * @package    OpenMage_Tests
+ */
+
+declare(strict_types=1);
+
+namespace unit\Base;
+
+use Composer\InstalledVersions;
+use PHPUnit\Framework\TestCase;
+
+final class TinyMCELicenseTest extends TestCase
+{
+    public const TINY_MCE_NAMESPACE = 'tinymce/tinymce';
+
+    public const ERROR_MESSAGE = "License file doesn't exist.";
+
+    public const SKIP_MESSAGE = 'TinyMCE is not installed.';
+
+    /**
+     * @group Base
+     * @group TinyMCE
+     */
+    public function testRootLicenseFilesExists(): void
+    {
+        if (InstalledVersions::isInstalled(self::TINY_MCE_NAMESPACE)) {
+            $filename = 'LICENSE_TINYMCE.txt';
+            self::assertFileExists($filename, self::ERROR_MESSAGE);
+        } else {
+            self::markTestSkipped(self::SKIP_MESSAGE);
+        }
+    }
+
+    /**
+     * @group Base
+     * @group TinyMCE
+     */
+    public function testVendorLicenseFilesExists(): void
+    {
+        if (InstalledVersions::isInstalled(self::TINY_MCE_NAMESPACE)) {
+            // @todo find a better way to get vendor dir
+            $filename = 'vendor/tinymce/tinymce/LICENSE_TINYMCE_OPENMAGE.txt';
+            self::assertFileExists($filename, self::ERROR_MESSAGE);
+        } else {
+            self::markTestSkipped(self::SKIP_MESSAGE);
+        }
+    }
+}