Removing MarkdownTwigExtension dependency to MarkdownHelper

This allows the Twig extension to be used without the templating component.
This also introduces a new integration test as a sanity check that all the
configuration / compiler pass was setup correctly.

.gitignore

@@ -2,3 +2,4 @@ phpunit.xml
 vendor/*
 !vendor/parser
 composer.lock
+Tests/fixtures/app/cache

DependencyInjection/Compiler/ParsersCompilerPass.php

@@ -10,7 +10,7 @@ class ParsersCompilerPass implements CompilerPassInterface
 {
     public function process(ContainerBuilder $container)
     {
-        if (!$container->hasDefinition('templating.helper.markdown')) {
+        if (!$container->hasDefinition('markdown.parser.parser_manager')) {
             return;
         }
 
@@ -24,7 +24,7 @@ class ParsersCompilerPass implements CompilerPassInterface
             $defaultAlias = isset($defaultAlias['alias']) ? $defaultAlias['alias'] : null;
         }
 
-        $definition = $container->getDefinition('templating.helper.markdown');
+        $definition = $container->getDefinition('markdown.parser.parser_manager');
         if (empty($defaultAlias)) {
             $definition->addMethodCall('addParser', array(new Reference('markdown.parser'), 'default'));
         }

Helper/MarkdownHelper.php

@@ -2,24 +2,17 @@
 
 namespace Knp\Bundle\MarkdownBundle\Helper;
 
+use Knp\Bundle\MarkdownBundle\Parser\ParserManager;
 use Symfony\Component\Templating\Helper\HelperInterface;
-use Knp\Bundle\MarkdownBundle\MarkdownParserInterface;
 
 class MarkdownHelper implements HelperInterface
 {
-    /**
-     * @var MarkdownParserInterface[]
-     */
-    private $parsers = array();
+    private $parserManager;
     private $charset = 'UTF-8';
 
-    /**
-     * @param MarkdownParserInterface $parser
-     * @param string                  $alias
-     */
-    public function addParser(MarkdownParserInterface $parser, $alias)
+    public function __construct(ParserManager $parserManager)
     {
-        $this->parsers[$alias] = $parser;
+        $this->parserManager = $parserManager;
     }
 
     /**
@@ -34,17 +27,7 @@ class MarkdownHelper implements HelperInterface
      */
     public function transform($markdownText, $parserName = null)
     {
-        if (null === $parserName) {
-            $parserName = 'default';
-        }
-
-        if (!isset($this->parsers[$parserName])) {
-            throw new \RuntimeException(sprintf('Unknown parser selected ("%s"), available are: %s', $parserName, implode(', ', array_keys($this->parsers))));
-        }
-
-        $parser = $this->parsers[$parserName];
-
-        return $parser->transformMarkdown($markdownText);
+        return $this->parserManager->transform($markdownText, $parserName);
     }
 
     /**

Parser/ParserManager.php

@@ -0,0 +1,47 @@
+<?php
+
+namespace Knp\Bundle\MarkdownBundle\Parser;
+
+use Knp\Bundle\MarkdownBundle\MarkdownParserInterface;
+
+class ParserManager
+{
+    /**
+     * @var MarkdownParserInterface[]
+     */
+    private $parsers = array();
+
+    /**
+     * @param MarkdownParserInterface $parser
+     * @param string                  $alias
+     */
+    public function addParser(MarkdownParserInterface $parser, $alias)
+    {
+        $this->parsers[$alias] = $parser;
+    }
+
+    /**
+     * Transforms markdown syntax to HTML
+     *
+     * @param string      $markdownText The markdown syntax text
+     * @param null|string $parserName
+     *
+     * @return string                   The HTML code
+     *
+     * @throws \RuntimeException
+     */
+    public function transform($markdownText, $parserName = null)
+    {
+        if (null === $parserName) {
+            $parserName = 'default';
+        }
+
+        if (!isset($this->parsers[$parserName])) {
+            throw new \RuntimeException(sprintf('Unknown parser selected ("%s"), available are: %s', $parserName, implode(', ', array_keys($this->parsers))));
+        }
+
+        $parser = $this->parsers[$parserName];
+
+        return $parser->transformMarkdown($markdownText);
+    }
+}

Resources/config/parser.xml

@@ -19,5 +19,8 @@
         <service id="markdown.parser.flavored" class="Knp\Bundle\MarkdownBundle\Parser\Preset\Flavored" public="false">
             <tag name="markdown.parser" alias="flavored" />
         </service>
+
+        <!-- parsers will be injected with a compiler pass -->
+        <service id="markdown.parser.parser_manager" class="Knp\Bundle\MarkdownBundle\Parser\ParserManager" />
     </services>
 </container>

Resources/config/twig.xml

@@ -5,7 +5,7 @@
 
     <services>
         <service id="twig.extension.exercise.twig" class="Knp\Bundle\MarkdownBundle\Twig\Extension\MarkdownTwigExtension" public="false">
-            <argument type="service" id="templating.helper.markdown" />
+            <argument type="service" id="markdown.parser.parser_manager" />
             <tag name="twig.extension" />
         </service>
     </services>

Tests/Parser/ParserManagerTest.php

@@ -0,0 +1,27 @@
+<?php
+
+namespace Knp\Bundle\MarkdownBundle\Tests\Parser;
+
+use Knp\Bundle\MarkdownBundle\Tests\fixtures\app\TestKernel;
+use Knp\Bundle\MarkdownBundle\Parser\ParserManager;
+
+class ParserManagerTest extends \PHPUnit_Framework_TestCase
+{
+    public function testIntegration()
+    {
+        require_once __DIR__.'/../fixtures/app/TestKernel.php';
+
+        $kernel = new TestKernel('dev', true);
+        $kernel->boot();
+        $container = $kernel->getContainer();
+
+        /** @var ParserManager $parserManager */
+        $parserManager = $container->get('markdown.parser.parser_manager');
+
+        $actual = $parserManager->transform('*hi*');
+        $this->assertEquals("<p><em>hi</em></p>\n", $actual, 'There is a default parser');
+
+        $actual = $parserManager->transform('*hi*', 'light');
+        $this->assertEquals("<p><em>hi</em></p>\n", $actual, 'Specific parsers are registered');
+    }
+}

Tests/fixtures/app/TestKernel.php

@@ -0,0 +1,30 @@
+<?php
+
+namespace Knp\Bundle\MarkdownBundle\Tests\fixtures\app;
+
+use Knp\Bundle\MarkdownBundle\KnpMarkdownBundle;
+use Symfony\Bundle\FrameworkBundle\FrameworkBundle;
+use Symfony\Component\Config\Loader\LoaderInterface;
+use Symfony\Component\DependencyInjection\ContainerBuilder;
+use Symfony\Component\HttpKernel\Bundle\BundleInterface;
+use Symfony\Component\HttpKernel\Kernel;
+
+class TestKernel extends Kernel
+{
+    public function registerBundles()
+    {
+        return array(
+            new FrameworkBundle(),
+            new KnpMarkdownBundle(),
+        );
+    }
+
+    public function registerContainerConfiguration(LoaderInterface $loader)
+    {
+        $loader->load(function(ContainerBuilder $c) {
+            $c->loadFromExtension('framework', array(
+                'secret' => 'MarkdownTesting'
+            ));
+        });
+    }
+}

Twig/Extension/MarkdownTwigExtension.php

@@ -2,15 +2,15 @@
 
 namespace Knp\Bundle\MarkdownBundle\Twig\Extension;
 
-use Knp\Bundle\MarkdownBundle\Helper\MarkdownHelper;
+use Knp\Bundle\MarkdownBundle\Parser\ParserManager;
 
 class MarkdownTwigExtension extends \Twig_Extension
 {
-    protected $helper;
+    protected $parserManager;
 
-    public function __construct(MarkdownHelper $helper)
+    public function __construct(ParserManager $parserManager)
     {
-        $this->helper = $helper;
+        $this->parserManager = $parserManager;
     }
 
     public function getFilters()
@@ -22,7 +22,7 @@ class MarkdownTwigExtension extends \Twig_Extension
 
     public function markdown($text, $parser = null)
     {
-        return $this->helper->transform($text, $parser);
+        return $this->parserManager->transform($text, $parser);
     }
 
     public function getName()