Add first Unit test

Tests/Unit/Domain/Model/TagTest.php

@@ -0,0 +1,40 @@
+<?php
+/**
+ * TagTest
+ */
+
+namespace HDNET\Tagger\Tests\Unit\Domain\Model;
+
+use HDNET\Tagger\Domain\Model\Tag;
+
+/**
+ * TagTest
+ */
+class TagTest extends \TYPO3\CMS\Core\Tests\UnitTestCase
+{
+
+    /**
+     * @var Tag
+     */
+    protected $fileDomainModelInstance;
+
+    /**
+     * Setup
+     *
+     * @return void
+     */
+    protected function setUp()
+    {
+        $this->fileDomainModelInstance = new Tag();
+    }
+
+    /**
+     * @test
+     */
+    public function titleCanBeSet()
+    {
+        $title = 'This is the title';
+        $this->fileDomainModelInstance->setTitle($title);
+        $this->assertEquals($title, $this->fileDomainModelInstance->getTitle());
+    }
+}