First version of functional tests working

module/Core/test-func/Repository/TagRepositoryTest.php

@@ -0,0 +1,49 @@
+<?php
+declare(strict_types=1);
+
+namespace ShlinkioTest\Shlink\Core\Repository;
+
+use Shlinkio\Shlink\Core\Entity\Tag;
+use Shlinkio\Shlink\Core\Repository\TagRepository;
+use ShlinkioTest\Shlink\Common\DbUnit\DatabaseTestCase;
+
+class TagRepositoryTest extends DatabaseTestCase
+{
+    const ENTITIES_TO_EMPTY = [
+        Tag::class,
+    ];
+
+    /**
+     * @var TagRepository
+     */
+    private $repo;
+
+    protected function setUp()
+    {
+        $this->repo = $this->getEntityManager()->getRepository(Tag::class);
+    }
+
+    /**
+     * @test
+     */
+    public function deleteByNameDoesNothingWhenEmptyListIsProvided()
+    {
+        $this->assertEquals(0, $this->repo->deleteByName([]));
+    }
+
+    /**
+     * @test
+     */
+    public function allTagsWhichMatchNameAreDeleted()
+    {
+        $names = ['foo', 'bar', 'baz'];
+        $toDelete = ['foo', 'baz'];
+
+        foreach ($names as $name) {
+            $this->getEntityManager()->persist(new Tag($name));
+        }
+        $this->getEntityManager()->flush();
+
+        $this->assertEquals(2, $this->repo->deleteByName($toDelete));
+    }
+}