diff --git a/Models/SurveyAnswer.php b/Models/SurveyAnswer.php
index 1ed6228..96af04d 100644
--- a/Models/SurveyAnswer.php
+++ b/Models/SurveyAnswer.php
@@ -24,6 +24,14 @@ namespace Modules\Surveys\Models;
  */
 final class SurveyAnswer
 {
+    /**
+     * ID.
+     *
+     * @var int
+     * @since 1.0.0
+     */
+    protected int $id = 0;
+
     /**
      * Constructor
      *
@@ -32,4 +40,16 @@ final class SurveyAnswer
     public function __construct()
     {
     }
+
+    /**
+     * Get id.
+     *
+     * @return int
+     *
+     * @since 1.0.0
+     */
+    public function getId() : int
+    {
+        return $this->id;
+    }
 }
diff --git a/Models/SurveyTemplate.php b/Models/SurveyTemplate.php
index 881ab2c..bb50ad3 100644
--- a/Models/SurveyTemplate.php
+++ b/Models/SurveyTemplate.php
@@ -101,7 +101,7 @@ class SurveyTemplate
      * @var string
      * @since 1.0.0
      */
-    private string $virtualPath = '/';
+    public string $virtualPath = '/';
 
     /**
      * Tags.
@@ -186,6 +186,20 @@ class SurveyTemplate
         return $this->tags;
     }
 
+    /**
+     * Get tag.
+     *
+     * @param int $id Element id
+     *
+     * @return Tag
+     *
+     * @since 1.0.0
+     */
+    public function getTag(int $id) : Tag
+    {
+        return $this->tags[$id] ?? new NullTag();
+    }
+
     /**
      * Add tag
      *
@@ -200,6 +214,26 @@ class SurveyTemplate
         $this->tags[] = $tag;
     }
 
+    /**
+     * Remove Tag from list.
+     *
+     * @param int $id Tag
+     *
+     * @return bool
+     *
+     * @since 1.0.0
+     */
+    public function removeTag($id) : bool
+    {
+        if (isset($this->tags[$id])) {
+            unset($this->tags[$id]);
+
+            return true;
+        }
+
+        return false;
+    }
+
     /**
      * Get all media
      *
@@ -237,4 +271,45 @@ class SurveyTemplate
     {
         return $this->elements;
     }
+
+    /**
+     * Add element
+     *
+     * @param SurveyTemplateElement $element Survey element to add
+     *
+     * @return void
+     *
+     * @since 1.0.0
+     */
+    public function addElement(SurveyTemplateElement $element) : void
+    {
+        $this->elements[] = $element;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function toArray() : array
+    {
+        return [
+            'id'              => $this->id,
+            'status'          => $this->status,
+            'hasPublicResult' => $this->hasPublicResult,
+            'createdAt'       => $this->createdAt,
+            'start'           => $this->start,
+            'end'             => $this->end,
+            'virtualPath'     => $this->virtualPath,
+            'tags'            => $this->tags,
+            'elements'        => $this->elements,
+            'media'           => $this->media,
+        ];
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function jsonSerialize()
+    {
+        return $this->toArray();
+    }
 }
diff --git a/Models/SurveyTemplateElement.php b/Models/SurveyTemplateElement.php
index 6481528..61c16dd 100644
--- a/Models/SurveyTemplateElement.php
+++ b/Models/SurveyTemplateElement.php
@@ -149,6 +149,18 @@ class SurveyTemplateElement
         return $this->labels;
     }
 
+    /**
+     * @param mixed $value Label value
+     *
+     * @return void
+     *
+     * @since 1.0.0
+     */
+    public function addValue($value) : void
+    {
+        $this->values[] = $value;
+    }
+
     /**
      * @return array
      *
@@ -158,4 +170,28 @@ class SurveyTemplateElement
     {
         return $this->values;
     }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function toArray() : array
+    {
+        return [
+            'id'               => $this->id,
+            'type'             => $this->type,
+            'isOptional'       => $this->isOptional,
+            'order'            => $this->order,
+            'template'         => $this->template,
+            'labels'           => $this->labels,
+            'values'           => $this->values,
+        ];
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function jsonSerialize()
+    {
+        return $this->toArray();
+    }
 }
diff --git a/Models/SurveyTemplateElementL11n.php b/Models/SurveyTemplateElementL11n.php
index 890034f..8725a9a 100644
--- a/Models/SurveyTemplateElementL11n.php
+++ b/Models/SurveyTemplateElementL11n.php
@@ -41,7 +41,7 @@ class SurveyTemplateElementL11n implements \JsonSerializable, ArrayableInterface
      * @var int
      * @since 1.0.0
      */
-    protected int $element = 0;
+    public int $element = 0;
 
     /**
      * Language.
@@ -105,32 +105,6 @@ class SurveyTemplateElementL11n implements \JsonSerializable, ArrayableInterface
         return $this->id;
     }
 
-    /**
-     * Set element.
-     *
-     * @param int $element Surveys id
-     *
-     * @return void
-     *
-     * @since 1.0.0
-     */
-    public function setElement(int $element) : void
-    {
-        $this->element = $element;
-    }
-
-    /**
-     * Get element
-     *
-     * @return int
-     *
-     * @since 1.0.0
-     */
-    public function getElement() : int
-    {
-        return $this->element;
-    }
-
     /**
      * Get language
      *
diff --git a/Models/SurveyTemplateL11n.php b/Models/SurveyTemplateL11n.php
index 01e842c..d0c04ea 100644
--- a/Models/SurveyTemplateL11n.php
+++ b/Models/SurveyTemplateL11n.php
@@ -41,7 +41,7 @@ class SurveyTemplateL11n implements \JsonSerializable, ArrayableInterface
      * @var int
      * @since 1.0.0
      */
-    protected int $template = 0;
+    public int $template = 0;
 
     /**
      * Language.
@@ -105,32 +105,6 @@ class SurveyTemplateL11n implements \JsonSerializable, ArrayableInterface
         return $this->id;
     }
 
-    /**
-     * Set template.
-     *
-     * @param int $template Surveys id
-     *
-     * @return void
-     *
-     * @since 1.0.0
-     */
-    public function setSurvey(int $template) : void
-    {
-        $this->template = $template;
-    }
-
-    /**
-     * Get template
-     *
-     * @return int
-     *
-     * @since 1.0.0
-     */
-    public function getSurvey() : int
-    {
-        return $this->template;
-    }
-
     /**
      * Get language
      *
@@ -163,11 +137,12 @@ class SurveyTemplateL11n implements \JsonSerializable, ArrayableInterface
     public function toArray() : array
     {
         return [
-            'id'             => $this->id,
-            'title'          => $this->title,
-            'description'    => $this->description,
-            'template'       => $this->template,
-            'language'       => $this->language,
+            'id'                  => $this->id,
+            'title'               => $this->title,
+            'description'         => $this->description,
+            'descriptionPlain'    => $this->descriptionPlain,
+            'template'            => $this->template,
+            'language'            => $this->language,
         ];
     }
 
diff --git a/Models/SurveyTemplateLabelL11n.php b/Models/SurveyTemplateLabelL11n.php
index 4411d2e..c79086b 100644
--- a/Models/SurveyTemplateLabelL11n.php
+++ b/Models/SurveyTemplateLabelL11n.php
@@ -41,7 +41,7 @@ class SurveyTemplateLabelL11n implements \JsonSerializable, ArrayableInterface
      * @var int
      * @since 1.0.0
      */
-    protected int $element = 0;
+    public int $element = 0;
 
     /**
      * Order.
@@ -93,32 +93,6 @@ class SurveyTemplateLabelL11n implements \JsonSerializable, ArrayableInterface
         return $this->id;
     }
 
-    /**
-     * Set element.
-     *
-     * @param int $element Surveys id
-     *
-     * @return void
-     *
-     * @since 1.0.0
-     */
-    public function setElement(int $element) : void
-    {
-        $this->element = $element;
-    }
-
-    /**
-     * Get element
-     *
-     * @return int
-     *
-     * @since 1.0.0
-     */
-    public function getElement() : int
-    {
-        return $this->element;
-    }
-
     /**
      * Get language
      *
@@ -154,6 +128,7 @@ class SurveyTemplateLabelL11n implements \JsonSerializable, ArrayableInterface
             'id'           => $this->id,
             'title'        => $this->title,
             'element'      => $this->element,
+            'order'        => $this->order,
             'language'     => $this->language,
         ];
     }
diff --git a/tests/Controller/ApiControllerTest.php b/tests/Controller/ApiControllerTest.php
new file mode 100644
index 0000000..bd24e06
--- /dev/null
+++ b/tests/Controller/ApiControllerTest.php
@@ -0,0 +1,220 @@
+<?php
+/**
+ * Orange Management
+ *
+ * PHP Version 8.0
+ *
+ * @package   tests
+ * @copyright Dennis Eichhorn
+ * @license   OMS License 1.0
+ * @version   1.0.0
+ * @link      https://orange-management.org
+ */
+declare(strict_types=1);
+
+namespace Modules\Surveys\tests\Controller;
+
+use Model\CoreSettings;
+use Modules\Admin\Models\AccountPermission;
+use Modules\Surveys\Models\SurveyElementType;
+use phpOMS\Account\Account;
+use phpOMS\Account\AccountManager;
+use phpOMS\Account\PermissionType;
+use phpOMS\Application\ApplicationAbstract;
+use phpOMS\DataStorage\Session\HttpSession;
+use phpOMS\Dispatcher\Dispatcher;
+use phpOMS\Event\EventManager;
+use phpOMS\Message\Http\HttpRequest;
+use phpOMS\Message\Http\HttpResponse;
+use phpOMS\Message\Http\RequestStatusCode;
+use phpOMS\Module\ModuleAbstract;
+use phpOMS\Module\ModuleManager;
+use phpOMS\Router\WebRouter;
+use phpOMS\System\MimeType;
+use phpOMS\Uri\HttpUri;
+use phpOMS\Utils\TestUtils;
+
+/**
+ * @testdox Modules\Surveys\tests\Controller\ApiControllerTest: Surveys api controller
+ *
+ * @internal
+ */
+final class ApiControllerTest extends \PHPUnit\Framework\TestCase
+{
+    protected ApplicationAbstract $app;
+
+    /**
+     * @var \Modules\Surveys\Controller\ApiController
+     */
+    protected ModuleAbstract $module;
+
+    /**
+     * {@inheritdoc}
+     */
+    protected function setUp() : void
+    {
+        $this->app = new class() extends ApplicationAbstract
+        {
+            protected string $appName = 'Api';
+        };
+
+        $this->app->dbPool         = $GLOBALS['dbpool'];
+        $this->app->orgId          = 1;
+        $this->app->accountManager = new AccountManager($GLOBALS['session']);
+        $this->app->appSettings    = new CoreSettings();
+        $this->app->moduleManager  = new ModuleManager($this->app, __DIR__ . '/../../../../Modules/');
+        $this->app->dispatcher     = new Dispatcher($this->app);
+        $this->app->eventManager   = new EventManager($this->app->dispatcher);
+        $this->app->eventManager->importFromFile(__DIR__ . '/../../../../Web/Api/Hooks.php');
+        $this->app->sessionManager = new HttpSession(36000);
+
+        $account = new Account();
+        TestUtils::setMember($account, 'id', 1);
+
+        $permission = new AccountPermission();
+        $permission->setUnit(1);
+        $permission->setApp('backend');
+        $permission->setPermission(
+            PermissionType::READ
+            | PermissionType::CREATE
+            | PermissionType::MODIFY
+            | PermissionType::DELETE
+            | PermissionType::PERMISSION
+        );
+
+        $account->addPermission($permission);
+
+        $this->app->accountManager->add($account);
+        $this->app->router = new WebRouter();
+
+        $this->module = $this->app->moduleManager->get('Surveys');
+
+        TestUtils::setMember($this->module, 'app', $this->app);
+    }
+
+    /**
+     * @covers Modules\Surveys\Controller\ApiController
+     * @group module
+     */
+    public function testApiSurveyTemplateCreate() : void
+    {
+        $response = new HttpResponse();
+        $request  = new HttpRequest(new HttpUri(''));
+
+        $request->header->account = 1;
+        $request->setData('title', 'TestSurvey');
+        $request->setData('description', 'Test description');
+
+        $request->setData('tags', '[{"title": "TestTitle", "color": "#f0f", "language": "en"}, {"id": 1}]');
+
+        if (!\is_file(__DIR__ . '/test_tmp.md')) {
+            \copy(__DIR__ . '/test.md', __DIR__ . '/test_tmp.md');
+        }
+
+        TestUtils::setMember($request, 'files', [
+            'file1' => [
+                'name'     => 'test.md',
+                'type'     => MimeType::M_TXT,
+                'tmp_name' => __DIR__ . '/test_tmp.md',
+                'error'    => \UPLOAD_ERR_OK,
+                'size'     => \filesize(__DIR__ . '/test_tmp.md'),
+            ],
+        ]);
+
+        $request->setData('media', \json_encode([1]));
+
+        $this->module->apiSurveyTemplateCreate($request, $response);
+        self::assertGreaterThan(0, $response->get('')['response']->getId());
+    }
+
+    /**
+     * @covers Modules\Surveys\Controller\ApiController
+     * @group module
+     */
+    public function testApiSurveyTemplateCreateInvalidData() : void
+    {
+        $response = new HttpResponse();
+        $request  = new HttpRequest(new HttpUri(''));
+
+        $request->header->account = 1;
+        $request->setData('invalid', '1');
+
+        $this->module->apiSurveyTemplateCreate($request, $response);
+        self::assertEquals(RequestStatusCode::R_400, $response->header->status);
+    }
+
+    /**
+     * @covers Modules\Surveys\Controller\ApiController
+     * @group module
+     */
+    public function testApiSurveyTemplateElementCreate() : void
+    {
+        $response = new HttpResponse();
+        $request  = new HttpRequest(new HttpUri(''));
+
+        $request->header->account = 1;
+        $request->setData('survey', '1');
+        $request->setData('text', 'Some text');
+        $request->setData('description', 'Some description');
+        $request->setData('type', SurveyElementType::RADIO);
+
+        $count = 5;
+        for ($m = 0; $m < $count; ++$m) {
+            $labels[] = 'Label_' . ($m + 1);
+            $values[] = 'v_' . $m;
+        }
+
+        $this->module->apiSurveyTemplateElementCreate($request, $response);
+        self::assertGreaterThan(0, $response->get('')['response']->getId());
+    }
+
+    /**
+     * @covers Modules\Surveys\Controller\ApiController
+     * @group module
+     */
+    public function testApiSurveyTemplateElementCreateInvalidData() : void
+    {
+        $response = new HttpResponse();
+        $request  = new HttpRequest(new HttpUri(''));
+
+        $request->header->account = 1;
+        $request->setData('invalid', '1');
+
+        $this->module->apiSurveyTemplateElementCreate($request, $response);
+        self::assertEquals(RequestStatusCode::R_400, $response->header->status);
+    }
+
+    /**
+     * @covers Modules\Surveys\Controller\ApiController
+     * @group module
+     */
+    public function testApiSurveyAnswerCreate() : void
+    {
+        $response = new HttpResponse();
+        $request  = new HttpRequest(new HttpUri(''));
+
+        $request->header->account = 1;
+        $request->setData('survey', '1');
+        $request->setData('e_1', 'v_2');
+
+        $this->module->apiSurveyAnswerCreate($request, $response);
+        self::markTestIncomplete();
+        self::assertGreaterThan(0, $response->get('')['response']->getId());
+    }
+
+    /**
+     * @covers Modules\Surveys\Controller\ApiController
+     * @group module
+     */
+    public function testApiSurveyAnswerCreateInvalidData() : void
+    {
+        $response = new HttpResponse();
+        $request  = new HttpRequest(new HttpUri(''));
+
+        $request->header->account = 1;
+        $request->setData('invalid', '1');
+
+        $this->module->apiSurveyAnswerCreate($request, $response);
+        self::assertEquals(RequestStatusCode::R_400, $response->header->status);
+    }
+}
diff --git a/tests/Controller/test.md b/tests/Controller/test.md
new file mode 100644
index 0000000..d35f959
--- /dev/null
+++ b/tests/Controller/test.md
@@ -0,0 +1,3 @@
+# Test Title
+
+Some **test** text.
\ No newline at end of file
diff --git a/tests/Models/SurveyTemplateElementL11nTest.php b/tests/Models/SurveyTemplateElementL11nTest.php
new file mode 100644
index 0000000..a24f76c
--- /dev/null
+++ b/tests/Models/SurveyTemplateElementL11nTest.php
@@ -0,0 +1,102 @@
+<?php
+/**
+ * Orange Management
+ *
+ * PHP Version 8.0
+ *
+ * @package   tests
+ * @copyright Dennis Eichhorn
+ * @license   OMS License 1.0
+ * @version   1.0.0
+ * @link      https://orange-management.org
+ */
+declare(strict_types=1);
+
+namespace Modules\Surveys\tests\Models;
+
+use Modules\Surveys\Models\SurveyTemplateElementL11n;
+use phpOMS\Localization\ISO639x1Enum;
+
+/**
+ * @internal
+ */
+final class SurveyTemplateElementL11nTest extends \PHPUnit\Framework\TestCase
+{
+    private SurveyTemplateElementL11n $l11n;
+
+    /**
+     * {@inheritdoc}
+     */
+    protected function setUp() : void
+    {
+        $this->l11n = new SurveyTemplateElementL11n();
+    }
+
+    /**
+     * @covers Modules\Surveys\Models\SurveyTemplateElementL11n
+     * @group module
+     */
+    public function testDefault() : void
+    {
+        self::assertEquals(0, $this->l11n->getId());
+        self::assertEquals('', $this->l11n->text);
+        self::assertEquals('', $this->l11n->description);
+        self::assertEquals('', $this->l11n->descriptionPlain);
+        self::assertEquals(ISO639x1Enum::_EN, $this->l11n->getLanguage());
+    }
+
+    /**
+     * @covers Modules\Surveys\Models\SurveyTemplateElementL11n
+     * @group module
+     */
+    public function testTextInputOutput() : void
+    {
+        $this->l11n->text = 'TestName';
+        self::assertEquals('TestName', $this->l11n->text);
+    }
+
+    /**
+     * @covers Modules\Surveys\Models\SurveyTemplateElementL11n
+     * @group module
+     */
+    public function testDescriptionInputOutput() : void
+    {
+        $this->l11n->description = 'TestContent';
+        self::assertEquals('TestContent', $this->l11n->description);
+    }
+
+    /**
+     * @covers Modules\Surveys\Models\SurveyTemplateElementL11n
+     * @group module
+     */
+    public function testLanguageInputOutput() : void
+    {
+        $this->l11n->setLanguage(ISO639x1Enum::_DE);
+        self::assertEquals(ISO639x1Enum::_DE, $this->l11n->getLanguage());
+    }
+
+    /**
+     * @covers Modules\Surveys\Models\SurveyTemplateElementL11n
+     * @group module
+     */
+    public function testSerialize() : void
+    {
+        $this->l11n->text             = 'Title';
+        $this->l11n->description      = 'Content';
+        $this->l11n->descriptionPlain = 'ContentPlain';
+        $this->l11n->element          = 2;
+        $this->l11n->setLanguage(ISO639x1Enum::_DE);
+
+        self::assertEquals(
+            [
+                'id'                    => 0,
+                'text'                  => 'Title',
+                'description'           => 'Content',
+                'descriptionPlain'      => 'ContentPlain',
+                'element'               => 2,
+                'language'              => ISO639x1Enum::_DE,
+            ],
+            $this->l11n->jsonSerialize()
+        );
+    }
+}
diff --git a/tests/Models/SurveyTemplateElementTest.php b/tests/Models/SurveyTemplateElementTest.php
new file mode 100644
index 0000000..a48c6db
--- /dev/null
+++ b/tests/Models/SurveyTemplateElementTest.php
@@ -0,0 +1,106 @@
+<?php
+/**
+ * Orange Management
+ *
+ * PHP Version 8.0
+ *
+ * @package   tests
+ * @copyright Dennis Eichhorn
+ * @license   OMS License 1.0
+ * @version   1.0.0
+ * @link      https://orange-management.org
+ */
+declare(strict_types=1);
+
+namespace Modules\Surveys\tests\Models;
+
+use Modules\Surveys\Models\SurveyElementType;
+use Modules\Surveys\Models\SurveyTemplateElement;
+use Modules\Surveys\Models\SurveyTemplateElementL11n;
+use Modules\Surveys\Models\SurveyTemplateLabelL11n;
+
+/**
+ * @internal
+ */
+final class SurveyTemplateElementTest extends \PHPUnit\Framework\TestCase
+{
+    private SurveyTemplateElement $element;
+
+    /**
+     * {@inheritdoc}
+     */
+    protected function setUp() : void
+    {
+        $this->element = new SurveyTemplateElement();
+    }
+
+    /**
+     * @covers Modules\Surveys\Models\SurveyTemplateElement
+     * @group module
+     */
+    public function testDefault() : void
+    {
+        self::assertEquals(0, $this->element->getId());
+
+        $date = new \DateTime('now');
+        self::assertEquals([], $this->element->getLabels());
+        self::assertEquals([], $this->element->getValues());
+        self::assertInstanceOf('\Modules\Surveys\Models\SurveyTemplateElementL11n', $this->element->getL11n());
+    }
+
+    /**
+     * @covers Modules\Surveys\Models\SurveyTemplateElement
+     * @group module
+     */
+    public function testL11nInputOutput() : void
+    {
+        $this->element->setL11n(new SurveyTemplateElementL11n('NewTest'));
+        self::assertEquals('NewTest', $this->element->getL11n()->text);
+    }
+
+    /**
+     * @covers Modules\Surveys\Models\SurveyTemplateElement
+     * @group module
+     */
+    public function testLabelInputOutput() : void
+    {
+        $this->element->addLabel(new SurveyTemplateLabelL11n());
+        self::assertCount(1, $this->element->getLabels());
+    }
+
+    /**
+     * @covers Modules\Surveys\Models\SurveyTemplateElement
+     * @group module
+     */
+    public function testValueInputOutput() : void
+    {
+        $this->element->addValue('testValue');
+        self::assertCount(1, $this->element->getValues());
+    }
+
+    /**
+     * @covers Modules\Surveys\Models\SurveyTemplateElement
+     * @group module
+     */
+    public function testSerialize() : void
+    {
+        $this->element->isOptional       = true;
+        $this->element->order            = 3;
+        $this->element->template         = 2;
+
+        $serialized = $this->element->jsonSerialize();
+
+        self::assertEquals(
+            [
+                'id'               => 0,
+                'type'             => SurveyElementType::CHECKBOX,
+                'isOptional'       => true,
+                'order'            => 3,
+                'template'         => 2,
+                'labels'           => [],
+                'values'           => [],
+            ],
+            $serialized
+        );
+    }
+}
diff --git a/tests/Models/SurveyTemplateL11nTest.php b/tests/Models/SurveyTemplateL11nTest.php
new file mode 100644
index 0000000..6ed3e65
--- /dev/null
+++ b/tests/Models/SurveyTemplateL11nTest.php
@@ -0,0 +1,102 @@
+<?php
+/**
+ * Orange Management
+ *
+ * PHP Version 8.0
+ *
+ * @package   tests
+ * @copyright Dennis Eichhorn
+ * @license   OMS License 1.0
+ * @version   1.0.0
+ * @link      https://orange-management.org
+ */
+declare(strict_types=1);
+
+namespace Modules\Surveys\tests\Models;
+
+use Modules\Surveys\Models\SurveyTemplateL11n;
+use phpOMS\Localization\ISO639x1Enum;
+
+/**
+ * @internal
+ */
+final class SurveyTemplateL11nTest extends \PHPUnit\Framework\TestCase
+{
+    private SurveyTemplateL11n $l11n;
+
+    /**
+     * {@inheritdoc}
+     */
+    protected function setUp() : void
+    {
+        $this->l11n = new SurveyTemplateL11n();
+    }
+
+    /**
+     * @covers Modules\Surveys\Models\SurveyTemplateL11n
+     * @group module
+     */
+    public function testDefault() : void
+    {
+        self::assertEquals(0, $this->l11n->getId());
+        self::assertEquals('', $this->l11n->title);
+        self::assertEquals('', $this->l11n->description);
+        self::assertEquals('', $this->l11n->descriptionPlain);
+        self::assertEquals(ISO639x1Enum::_EN, $this->l11n->getLanguage());
+    }
+
+    /**
+     * @covers Modules\Surveys\Models\SurveyTemplateL11n
+     * @group module
+     */
+    public function testTextInputOutput() : void
+    {
+        $this->l11n->title = 'TestName';
+        self::assertEquals('TestName', $this->l11n->title);
+    }
+
+    /**
+     * @covers Modules\Surveys\Models\SurveyTemplateL11n
+     * @group module
+     */
+    public function testDescriptionInputOutput() : void
+    {
+        $this->l11n->description = 'TestContent';
+        self::assertEquals('TestContent', $this->l11n->description);
+    }
+
+    /**
+     * @covers Modules\Surveys\Models\SurveyTemplateL11n
+     * @group module
+     */
+    public function testLanguageInputOutput() : void
+    {
+        $this->l11n->setLanguage(ISO639x1Enum::_DE);
+        self::assertEquals(ISO639x1Enum::_DE, $this->l11n->getLanguage());
+    }
+
+    /**
+     * @covers Modules\Surveys\Models\SurveyTemplateL11n
+     * @group module
+     */
+    public function testSerialize() : void
+    {
+        $this->l11n->title            = 'Title';
+        $this->l11n->description      = 'Content';
+        $this->l11n->descriptionPlain = 'ContentPlain';
+        $this->l11n->template         = 2;
+        $this->l11n->setLanguage(ISO639x1Enum::_DE);
+
+        self::assertEquals(
+            [
+                'id'                    => 0,
+                'title'                 => 'Title',
+                'description'           => 'Content',
+                'descriptionPlain'      => 'ContentPlain',
+                'template'              => 2,
+                'language'              => ISO639x1Enum::_DE,
+            ],
+            $this->l11n->jsonSerialize()
+        );
+    }
+}
diff --git a/tests/Models/SurveyTemplateLabelL11nTest.php b/tests/Models/SurveyTemplateLabelL11nTest.php
new file mode 100644
index 0000000..6426eff
--- /dev/null
+++ b/tests/Models/SurveyTemplateLabelL11nTest.php
@@ -0,0 +1,88 @@
+<?php
+/**
+ * Orange Management
+ *
+ * PHP Version 8.0
+ *
+ * @package   tests
+ * @copyright Dennis Eichhorn
+ * @license   OMS License 1.0
+ * @version   1.0.0
+ * @link      https://orange-management.org
+ */
+declare(strict_types=1);
+
+namespace Modules\Surveys\tests\Models;
+
+use Modules\Surveys\Models\SurveyTemplateLabelL11n;
+use phpOMS\Localization\ISO639x1Enum;
+
+/**
+ * @internal
+ */
+final class SurveyTemplateLabelL11nTest extends \PHPUnit\Framework\TestCase
+{
+    private SurveyTemplateLabelL11n $l11n;
+
+    /**
+     * {@inheritdoc}
+     */
+    protected function setUp() : void
+    {
+        $this->l11n = new SurveyTemplateLabelL11n();
+    }
+
+    /**
+     * @covers Modules\Surveys\Models\SurveyTemplateLabelL11n
+     * @group module
+     */
+    public function testDefault() : void
+    {
+        self::assertEquals(0, $this->l11n->getId());
+        self::assertEquals('', $this->l11n->title);
+        self::assertEquals(ISO639x1Enum::_EN, $this->l11n->getLanguage());
+    }
+
+    /**
+     * @covers Modules\Surveys\Models\SurveyTemplateLabelL11n
+     * @group module
+     */
+    public function testTextInputOutput() : void
+    {
+        $this->l11n->title = 'TestName';
+        self::assertEquals('TestName', $this->l11n->title);
+    }
+
+    /**
+     * @covers Modules\Surveys\Models\SurveyTemplateLabelL11n
+     * @group module
+     */
+    public function testLanguageInputOutput() : void
+    {
+        $this->l11n->setLanguage(ISO639x1Enum::_DE);
+        self::assertEquals(ISO639x1Enum::_DE, $this->l11n->getLanguage());
+    }
+
+    /**
+     * @covers Modules\Surveys\Models\SurveyTemplateLabelL11n
+     * @group module
+     */
+    public function testSerialize() : void
+    {
+        $this->l11n->title      = 'Title';
+        $this->l11n->element    = 2;
+        $this->l11n->order      = 3;
+        $this->l11n->setLanguage(ISO639x1Enum::_DE);
+
+        self::assertEquals(
+            [
+                'id'              => 0,
+                'title'           => 'Title',
+                'element'         => 2,
+                'order'           => 3,
+                'language'        => ISO639x1Enum::_DE,
+            ],
+            $this->l11n->jsonSerialize()
+        );
+    }
+}
diff --git a/tests/Models/SurveyTemplateTest.php b/tests/Models/SurveyTemplateTest.php
new file mode 100644
index 0000000..4fd6e4f
--- /dev/null
+++ b/tests/Models/SurveyTemplateTest.php
@@ -0,0 +1,141 @@
+<?php
+/**
+ * Orange Management
+ *
+ * PHP Version 8.0
+ *
+ * @package   tests
+ * @copyright Dennis Eichhorn
+ * @license   OMS License 1.0
+ * @version   1.0.0
+ * @link      https://orange-management.org
+ */
+declare(strict_types=1);
+
+namespace Modules\Surveys\tests\Models;
+
+use Modules\Media\Models\Media;
+use Modules\Surveys\Models\SurveyStatus;
+use Modules\Surveys\Models\SurveyTemplate;
+use Modules\Surveys\Models\SurveyTemplateElement;
+use Modules\Surveys\Models\SurveyTemplateL11n;
+use Modules\Tag\Models\Tag;
+
+/**
+ * @internal
+ */
+final class SurveyTemplateTest extends \PHPUnit\Framework\TestCase
+{
+    private SurveyTemplate $survey;
+
+    /**
+     * {@inheritdoc}
+     */
+    protected function setUp() : void
+    {
+        $this->survey = new SurveyTemplate();
+    }
+
+    /**
+     * @covers Modules\Surveys\Models\SurveyTemplate
+     * @group module
+     */
+    public function testDefault() : void
+    {
+        self::assertEquals(0, $this->survey->getId());
+
+        $date = new \DateTime('now');
+        self::assertEquals([], $this->survey->getElements());
+        self::assertEquals([], $this->survey->getTags());
+        self::assertEquals([], $this->survey->getMedia());
+    }
+
+    /**
+     * @covers Modules\Surveys\Models\SurveyTemplate
+     * @group module
+     */
+    public function testTagInputOutput() : void
+    {
+        $tag = new Tag();
+        $tag->setL11n('Tag');
+
+        $this->survey->addTag($tag);
+        self::assertEquals($tag, $this->survey->getTag(0));
+        self::assertCount(1, $this->survey->getTags());
+    }
+
+    /**
+     * @covers Modules\Surveys\Models\SurveyTemplate
+     * @group module
+     */
+    public function testTagRemove() : void
+    {
+        $tag = new Tag();
+        $tag->setL11n('Tag');
+
+        $this->survey->addTag($tag);
+        self::assertTrue($this->survey->removeTag(0));
+        self::assertCount(0, $this->survey->getTags());
+        self::assertFalse($this->survey->removeTag(0));
+    }
+
+    /**
+     * @covers Modules\Surveys\Models\SurveyTemplate
+     * @group module
+     */
+    public function testMediaInputOutput() : void
+    {
+        $this->survey->addMedia(new Media());
+        self::assertCount(1, $this->survey->getMedia());
+    }
+
+    /**
+     * @covers Modules\Surveys\Models\SurveyTemplate
+     * @group module
+     */
+    public function testElementInputOutput() : void
+    {
+        $this->survey->addElement(new SurveyTemplateElement());
+        self::assertCount(1, $this->survey->getElements());
+    }
+
+    /**
+     * @covers Modules\Surveys\Models\SurveyTemplate
+     * @group module
+     */
+    public function testL11nInputOutput() : void
+    {
+        $this->survey->setL11n(new SurveyTemplateL11n('NewTest'));
+        self::assertEquals('NewTest', $this->survey->getL11n()->title);
+    }
+
+    /**
+     * @covers Modules\Surveys\Models\SurveyTemplate
+     * @group module
+     */
+    public function testSerialize() : void
+    {
+        $this->survey->hasPublicResult       = false;
+        $this->survey->start                 = new \DateTime('now');
+        $this->survey->end                   = new \DateTime('now');
+        $this->survey->virtualPath           = 'test/path';
+
+        $serialized = $this->survey->jsonSerialize();
+        unset($serialized['createdAt']);
+
+        self::assertEquals(
+            [
+                'id'              => 0,
+                'status'          => SurveyStatus::ACTIVE,
+                'hasPublicResult' => false,
+                'start'           => $this->survey->start,
+                'end'             => $this->survey->end,
+                'virtualPath'     => 'test/path',
+                'tags'            => [],
+                'elements'        => [],
+                'media'           => [],
+            ],
+            $serialized
+        );
+    }
+}