Add list user command

tests/Wallabag/CoreBundle/Command/ListUserCommandTest.php

@@ -0,0 +1,26 @@
+<?php
+
+namespace Tests\Wallabag\CoreBundle\Command;
+
+use Symfony\Bundle\FrameworkBundle\Console\Application;
+use Symfony\Component\Console\Tester\CommandTester;
+use Tests\Wallabag\CoreBundle\WallabagCoreTestCase;
+use Wallabag\CoreBundle\Command\ListUserCommand;
+
+class ListUserCommandTest extends WallabagCoreTestCase
+{
+    public function testRunListUserCommand()
+    {
+        $application = new Application($this->getClient()->getKernel());
+        $application->add(new ListUserCommand());
+
+        $command = $application->find('wallabag:user:list');
+
+        $tester = new CommandTester($command);
+        $tester->execute([
+            'command' => $command->getName(),
+        ]);
+
+        $this->assertContains('3 user(s) displayed.', $tester->getDisplay());
+    }
+}