Ensure orphan tag are remove in API

When the association between a tag and an entry is removed, if the tag doesn’t have other entries, we can remove it.

Also add more tests for that part and ensure TagControllerTest is isolated from the rest of the test suite (finally!)

tests/Wallabag/CoreBundle/Controller/EntryControllerTest.php

@@ -341,22 +341,23 @@ class EntryControllerTest extends WallabagCoreTestCase
         $this->logInAs('admin');
         $client = $this->getClient();
 
-        $content = $client->getContainer()
-            ->get('doctrine.orm.entity_manager')
+        $em = $client->getContainer()
+            ->get('doctrine.orm.entity_manager');
+
+        $content = $em
             ->getRepository('WallabagCoreBundle:Entry')
             ->findByUrlAndUserId($this->url, $this->getLoggedInUserId());
 
         // empty content
         $content->setContent('');
-        $client->getContainer()->get('doctrine.orm.entity_manager')->persist($content);
-        $client->getContainer()->get('doctrine.orm.entity_manager')->flush();
+        $em->persist($content);
+        $em->flush();
 
         $client->request('GET', '/reload/'.$content->getId());
 
         $this->assertEquals(302, $client->getResponse()->getStatusCode());
 
-        $content = $client->getContainer()
-            ->get('doctrine.orm.entity_manager')
+        $content = $em
             ->getRepository('WallabagCoreBundle:Entry')
             ->findByUrlAndUserId($this->url, $this->getLoggedInUserId());
 
@@ -486,9 +487,11 @@ class EntryControllerTest extends WallabagCoreTestCase
         $this->logInAs('admin');
         $client = $this->getClient();
 
+        $em = $client->getContainer()
+            ->get('doctrine.orm.entity_manager');
+
         // add a new content to be removed later
-        $user = $client->getContainer()
-            ->get('doctrine.orm.entity_manager')
+        $user = $em
             ->getRepository('WallabagUserBundle:User')
             ->findOneByUserName('admin');
 
@@ -502,12 +505,8 @@ class EntryControllerTest extends WallabagCoreTestCase
         $content->setArchived(true);
         $content->setLanguage('fr');
 
-        $client->getContainer()
-            ->get('doctrine.orm.entity_manager')
-            ->persist($content);
-        $client->getContainer()
-            ->get('doctrine.orm.entity_manager')
-            ->flush();
+        $em->persist($content);
+        $em->flush();
 
         $client->request('GET', '/view/'.$content->getId());
         $this->assertEquals(200, $client->getResponse()->getStatusCode());

tests/Wallabag/CoreBundle/Controller/TagControllerTest.php

@@ -3,6 +3,7 @@
 namespace Tests\Wallabag\CoreBundle\Controller;
 
 use Tests\Wallabag\CoreBundle\WallabagCoreTestCase;
+use Wallabag\CoreBundle\Entity\Tag;
 
 class TagControllerTest extends WallabagCoreTestCase
 {
@@ -134,36 +135,48 @@ class TagControllerTest extends WallabagCoreTestCase
         $client->request('GET', '/remove-tag/'.$entry->getId().'/'.$tag->getId());
 
         $this->assertEquals(404, $client->getResponse()->getStatusCode());
+
+        $tag = $client->getContainer()
+            ->get('doctrine.orm.entity_manager')
+            ->getRepository('WallabagCoreBundle:Tag')
+            ->findOneByLabel($this->tagName);
+
+        $this->assertNull($tag, $this->tagName.' was removed because it begun an orphan tag');
     }
 
     public function testShowEntriesForTagAction()
     {
         $this->logInAs('admin');
         $client = $this->getClient();
+        $em = $client->getContainer()
+            ->get('doctrine.orm.entity_manager');
+
+        $tag = new Tag();
+        $tag->setLabel($this->tagName);
 
         $entry = $client->getContainer()
             ->get('doctrine.orm.entity_manager')
             ->getRepository('WallabagCoreBundle:Entry')
             ->findByUrlAndUserId('http://0.0.0.0/entry4', $this->getLoggedInUserId());
 
-        $tag = $client->getContainer()
-            ->get('doctrine.orm.entity_manager')
-            ->getRepository('WallabagCoreBundle:Tag')
-            ->findOneByEntryAndTagLabel($entry, 'foo');
+        $tag->addEntry($entry);
 
-        $crawler = $client->request('GET', '/tag/list/'.$tag->getSlug());
-
-        $this->assertEquals(200, $client->getResponse()->getStatusCode());
-        $this->assertCount(2, $crawler->filter('div[class=entry]'));
+        $em->persist($entry);
+        $em->persist($tag);
+        $em->flush();
 
         $tag = $client->getContainer()
             ->get('doctrine.orm.entity_manager')
             ->getRepository('WallabagCoreBundle:Tag')
-            ->findOneByLabel('baz');
+            ->findOneByEntryAndTagLabel($entry, $this->tagName);
 
         $crawler = $client->request('GET', '/tag/list/'.$tag->getSlug());
 
         $this->assertEquals(200, $client->getResponse()->getStatusCode());
-        $this->assertCount(1, $crawler->filter('div[class=entry]'));
+        $this->assertCount(1, $crawler->filter('[id*="entry-"]'));
+
+        $entry->removeTag($tag);
+        $em->remove($tag);
+        $em->flush();
     }
 }