Add unit test

Author: samuelwei

tests/unit/Util/SimpleXMLElementExtendedTest.php

@@ -0,0 +1,46 @@
+<?php
+
+declare(strict_types=1);
+
+/**
+ * This file is part of littleredbutton/bigbluebutton-api-php.
+ *
+ * littleredbutton/bigbluebutton-api-php is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * littleredbutton/bigbluebutton-api-php 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 Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with littleredbutton/bigbluebutton-api-php. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+namespace BigBlueButton\Tests\Unit\Util;
+
+use BigBlueButton\Tests\Common\TestCase;
+use BigBlueButton\Util\SimpleXMLElementExtended;
+
+/**
+ * @covers \BigBlueButton\Util\SimpleXMLElementExtended
+ */
+final class SimpleXMLElementExtendedTest extends TestCase
+{
+    /**
+     * Test adding a child element with CDATA content.
+     */
+    public function testAddChildWithCData(): void
+    {
+        $xml = new SimpleXMLElementExtended('<?xml version="1.0" encoding="UTF-8"?><modules/>');
+        $module = $xml->addChildWithCData('module', '{"foo": {"foo": "baa"}}');
+        $module->addAttribute('name', 'clientSettingsOverride');
+
+        $expected = '<?xml version="1.0" encoding="UTF-8"?>
+<modules><module name="clientSettingsOverride"><![CDATA[{"foo": {"foo": "baa"}}]]></module></modules>';
+
+        $this->assertXmlStringEqualsXmlString($expected, $xml->asXML());
+    }
+}