Created Core module

module/Core/test/Service/VisitsTrackerTest.php

@@ -0,0 +1,30 @@
+<?php
+namespace ShlinkioTest\Shlink\Core\Service;
+
+use Doctrine\ORM\EntityManager;
+use Doctrine\ORM\EntityRepository;
+use PHPUnit_Framework_TestCase as TestCase;
+use Prophecy\Argument;
+use Shlinkio\Shlink\Core\Entity\ShortUrl;
+use Shlinkio\Shlink\Core\Service\VisitsTracker;
+
+class VisitsTrackerTest extends TestCase
+{
+    /**
+     * @test
+     */
+    public function trackPersistsVisit()
+    {
+        $shortCode = '123ABC';
+        $repo = $this->prophesize(EntityRepository::class);
+        $repo->findOneBy(['shortCode' => $shortCode])->willReturn(new ShortUrl());
+
+        $em = $this->prophesize(EntityManager::class);
+        $em->getRepository(ShortUrl::class)->willReturn($repo->reveal())->shouldBeCalledTimes(1);
+        $em->persist(Argument::any())->shouldBeCalledTimes(1);
+        $em->flush()->shouldBeCalledTimes(1);
+
+        $visitsTracker = new VisitsTracker($em->reveal());
+        $visitsTracker->track($shortCode);
+    }
+}