[TesterBundle] EventDispatcherTesterTrait

composer.json

@@ -19,6 +19,7 @@
         "doctrine/persistence": "^2.2 || ^3.0",
         "dragonmantank/cron-expression": "^3.3",
         "ext-ctype": "*",
+        "ext-dom": "*",
         "ext-iconv": "*",
         "ext-json": "*",
         "ext-mongodb": "*",

packages/tester-bundle/EventDispatcher/EventDispatcherTesterTrait.php

@@ -0,0 +1,88 @@
+<?php
+
+namespace Draw\Bundle\TesterBundle\EventDispatcher;
+
+use PHPUnit\Framework\TestCase;
+use Symfony\Component\Console\Tester\CommandTester;
+
+trait EventDispatcherTesterTrait
+{
+    protected static array $eventDispatcherFileCleaners = [
+        [EventDispatcherTesterTrait::class, 'cleanEventDispatcherFileContainerReference'],
+    ];
+
+    protected static function cleanEventDispatcherFile(string $filePath): void
+    {
+        foreach (static::$eventDispatcherFileCleaners as $cleaner) {
+            \call_user_func($cleaner, $filePath);
+        }
+    }
+
+    /**
+     * Clean reference in file that looks like this.
+     *
+     * <callable type="function" name="onKernelControllerArguments" class="ContainerPKL8sSi\RequestPayloadValueResolverGhostB42fd45" priority="0"/>
+     *
+     * By Removing the unique string pattern in the class attribute using DomDocument.
+     *
+     * The result after cleaning will be:
+     *
+     * <callable type="function" name="onKernelControllerArguments" class="Container\RequestPayloadValueResolverGhost" priority="0"/>
+     *
+     * Clean when the class name contains Container and Ghost in its name.
+     */
+    public static function cleanEventDispatcherFileContainerReference(string $filePath): void
+    {
+        $dom = new \DOMDocument();
+        $dom->load($filePath);
+
+        $xpath = new \DOMXPath($dom);
+
+        $nodes = $xpath->query('//callable[@class]');
+
+        foreach ($nodes as $node) {
+            \assert($node instanceof \DOMElement);
+            $class = $node->getAttribute('class');
+            if (preg_match('/Container.*Ghost/', $class)) {
+                // Use regex to match only the alphanumeric patterns that follow "Container" and "Ghost"
+                $class = preg_replace('/(?<=Container)[A-Za-z0-9]+|(?<=Ghost)[A-Za-z0-9]+/', '__cleaned__', $class);
+                $node->setAttribute('class', $class);
+            }
+        }
+
+        $dom->save($filePath);
+    }
+
+    public static function assertEventDispatcherConfiguration(string $expectedFilePath, string $dispatcherName = 'event_dispatcher'): void
+    {
+        $commandTester = new CommandTester(
+            static::getContainer()->get('console.command.event_dispatcher_debug')
+        );
+
+        $commandTester->execute([
+            '--dispatcher' => $dispatcherName,
+            '--format' => 'xml',
+        ]);
+
+        $display = $commandTester->getDisplay();
+
+        $resultFilePath = tempnam(sys_get_temp_dir(), 'event_dispatcher_configuration');
+
+        file_put_contents($resultFilePath, $display);
+
+        static::cleanEventDispatcherFile($resultFilePath);
+
+        register_shutdown_function('unlink', $resultFilePath);
+
+        if (!file_exists($expectedFilePath)) {
+            copy($resultFilePath, $expectedFilePath);
+
+            TestCase::fail($dispatcherName.' configuration file created at '.$expectedFilePath.'. Please review it and commit it.');
+        }
+
+        TestCase::assertXmlFileEqualsXmlFile(
+            $expectedFilePath,
+            $resultFilePath,
+        );
+    }
+}

packages/tester-bundle/README.md

@@ -3,29 +3,46 @@ Draw Tester Bundle
 
 This bundle integrate the Draw Tester Component.
 
-To use the HttpTesterTrait in a KernelTestCase you must simply do this:
+It also provides test helpers to make it easier to test your Symfony application.
 
-```PHP
-<?php namespace App\Tests;
+## Kernel Testing
 
-use Draw\Bundle\TesterBundle\Http\BrowserFactoryInterface;
-use Draw\Bundle\TesterBundle\Http\HttpTesterTrait;
+When configuring your kernel you may want to test that everything is hooked up correctly.
+
+There is the list of service, event dispatcher, command etc.
+
+There is some TestCase/Trait to help you do that (work in progress).
+
+### Event Dispatcher
+
+Relying on the `debug:event-dispatcher` command we can dump the list of event listeners and validated it against the expected list.
+
+```php
+<?php
+
+namespace App\Tests;
+
+use Draw\Bundle\TesterBundle\EventDispatcher\EventDispatcherTesterTrait;
 use Symfony\Bundle\FrameworkBundle\Test\KernelTestCase;
-use Symfony\Component\BrowserKit\AbstractBrowser;
 
-class TestCase extends KernelTestCase implements BrowserFactoryInterface
+class AppKernelTest extends KernelTestCase
 {
-    use HttpTesterTrait;
-    
-    public function createBrowser(): AbstractBrowser
+    use EventDispatcherTesterTrait;
+
+    public function testEventDispatcherConfiguration(): void
     {
-       return static::bootKernel()->getContainer()->get('test.client');
+        $this->assertEventDispatcherConfiguration(
+            __DIR__.'/fixtures/AppKernelTest/testEventDispatcherConfiguration/event_dispatcher.xml',
+           'event_dispatcher' // This is the default value, same as the debug:event-dispatcher command
+        );
     }
 }
 ```
 
-As you can see we are using the **HttpTesterTrait** of the **Bundle** instead of the **Component**.
-This is because it as the implementation of the implementation of the **createHttpTesterClient** method.
+The first time you run this test it will fail and dump the current configuration in the `event_dispatcher.xml` file.
+
+Commit this file, next time your rune this test you will be able to validate that the configuration is still valid.
+
+If you change the listener in your code or change your dependencies you can run the test again and see the diff.
 
-Also you can see that we are booting a new kernel every time. It's to make sure we are using a new container
-on each request like the behaviour of a normal client request will do.
+This will allow you to see if some external listeners changed at the same time.

packages/tester-bundle/composer.json

@@ -11,6 +11,7 @@
         "integration test"
     ],
     "require": {
+        "ext-dom": "*",
         "draw/core": "^0.11",
         "draw/tester": "^0.11",
         "symfony/browser-kit": "^6.4.0",

tests/AppKernelTest.php

@@ -0,0 +1,18 @@
+<?php
+
+namespace App\Tests;
+
+use Draw\Bundle\TesterBundle\EventDispatcher\EventDispatcherTesterTrait;
+use Symfony\Bundle\FrameworkBundle\Test\KernelTestCase;
+
+class AppKernelTest extends KernelTestCase
+{
+    use EventDispatcherTesterTrait;
+
+    public function testEventDispatcherConfiguration(): void
+    {
+        $this->assertEventDispatcherConfiguration(
+            __DIR__.'/fixtures/AppKernelTest/testEventDispatcherConfiguration/event_dispatcher.xml'
+        );
+    }
+}