Implemented tests for relation attribute trait

application/tests/Unit/Entity/Attribut/RelationAttributTest.php

@@ -0,0 +1,30 @@
+<?php
+
+namespace App\Tests\Unit\Entity\Attribut;
+
+use PHPUnit\Framework\TestCase;
+use App\Entity\Meta\RelationInterface;
+use App\Entity\Attribut\RelationAttributInterface;
+use App\Entity\Attribut\RelationAttribut;
+
+class RelationAttributTest extends TestCase
+{
+    /***
+     * @var RelationAttributInterface
+     */
+    protected $relationAttribut;
+
+    public function setUp(): void
+    {
+        $this->relationAttribut = new class() implements RelationAttributInterface {
+            use RelationAttribut;
+        };
+    }
+
+    public function testAccessors(): void
+    {
+        $relation = $this->createMock(RelationInterface::class);
+        $this->assertNull($this->relationAttribut->setRelation($relation));
+        $this->assertEquals($relation, $this->relationAttribut->getRelation());
+    }
+}