add tests for SMS requests

Tests/SMS/TextRequestTest.php

@@ -0,0 +1,28 @@
+<?php
+
+/**
+ * This Software is the property of Data Development and is protected
+ * by copyright law - it is NOT Freeware.
+ * Any unauthorized use of this software without a valid license
+ * is a violation of the license agreement and will be prosecuted by
+ * civil and criminal law.
+ * http://www.shopmodule.com
+ *
+ * @copyright (C) D3 Data Development (Inh. Thomas Dartsch)
+ * @author        D3 Data Development - Daniel Seifert <support@shopmodule.com>
+ * @link          http://www.oxidmodule.com
+ */
+
+declare( strict_types = 1 );
+
+namespace D3\LinkmobilityClient\Tests\SMS;
+
+use D3\LinkmobilityClient\SMS\TextRequest;
+use D3\LinkmobilityClient\Tests\Request\AbstractRequest;
+use D3\LinkmobilityClient\ValueObject\SmsTextMessage;
+
+class TextRequestTest extends AbstractRequest
+{
+    protected $testClassName = TextRequest::class;
+    protected $messageClassName = SmsTextMessage::class;
+}