Started to add a tests

Author: Nyholm

composer.json

@@ -23,7 +23,8 @@
         "php-cache/doctrine-cache":      "dev-master"
     },
     "require-dev":  {
-        "phpunit/phpunit": "^5.1|^4.0"
+        "phpunit/phpunit": "^5.1|^4.0",
+        "matthiasnoback/symfony-dependency-injection-test": "0.7.*"
     },
     "autoload":     {
         "psr-4": {

tests/DependencyInjection/DoctrineCacheExtensionTest.php

@@ -0,0 +1,24 @@
+<?php
+
+namespace Cache\DoctrineCacheBundle\Tests\DependencyInjection;
+
+use Cache\DoctrineCacheBundle\DependencyInjection\DoctrineCacheExtension;
+use Matthias\SymfonyDependencyInjectionTest\PhpUnit\AbstractExtensionTestCase;
+
+class DoctrineCacheExtensionTest extends AbstractExtensionTestCase
+{
+
+    protected function getContainerExtensions()
+    {
+        return array(
+            new DoctrineCacheExtension()
+        );
+    }
+
+    public function after_loading_the_correct_parameter_has_been_set()
+    {
+        $this->load();
+
+        $this->assertContainerBuilderHasParameter('doctrine_cache.providers');
+    }
+}