✅ Add SessionHandler test (#54)

Tests/Handler/AlertifySessionHandlerTest.php

@@ -0,0 +1,60 @@
+<?php
+
+namespace Troopers\AlertifyBundle\Tests\Helper;
+
+use Symfony\Component\DependencyInjection\ContainerBuilder;
+use Symfony\Component\HttpFoundation\Session\Session;
+use Symfony\Component\HttpFoundation\Session\Storage\MockArraySessionStorage;
+use Troopers\AlertifyBundle\DependencyInjection\TroopersAlertifyExtension;
+use Troopers\AlertifyBundle\Handler\AlertifySessionHandler;
+use Troopers\AlertifyBundle\Helper\AlertifyHelper;
+
+class AlertifySessionHandlerTest extends \PHPUnit_Framework_TestCase
+{
+    /**
+     * @var \Twig_Environment
+     */
+    protected $twigEnvironment;
+    /**
+     * @var Session
+     */
+    protected $session;
+
+    public function testDefault()
+    {
+        $this->mockSession();
+        $container = new ContainerBuilder();
+        $loader = new TroopersAlertifyExtension();
+        $loader->load([[]], $container);
+        /** @var AlertifyHelper $helper */
+        $helper = new AlertifyHelper($this->session);
+        $handler = new AlertifySessionHandler(
+            $this->getTwigEnvironmentMock(),
+            $container->getParameter('troopers_alertify')
+        );
+
+        $helper->congrat('Alert1');
+        $this->assertEquals(1, count(explode(' ', $handler->handle($this->session))));
+        $helper->congrat('Alert2');
+        $helper->congrat('Alert3', ['opt1' => 42]);
+        $helper->congrat('Alert4');
+        $this->assertEquals(3, count(explode(' ', $handler->handle($this->session))));
+    }
+
+    /**
+     * @return Session
+     */
+    protected function mockSession()
+    {
+        $this->session = new Session(new MockArraySessionStorage());
+    }
+
+    protected function getTwigEnvironmentMock()
+    {
+        $twigEnvironment = $this->getMockBuilder('Twig_Environment')
+            ->setMethods(['render'])
+            ->getMock();
+
+        return $twigEnvironment;
+    }
+}