introduce phpstan

composer.json

@@ -27,7 +27,10 @@
         "symfony/browser-kit": "^6.4",
         "symfony/framework-bundle": "^6.4",
         "symfony/http-kernel": "^6.4",
-        "symfony/stopwatch": "^6.4"
+        "symfony/stopwatch": "^6.4",
+        "phpstan/phpstan": "^1.11",
+        "phpstan/phpstan-symfony": "^1.4",
+        "symfony/runtime": "^6.4"
     },
     "autoload": {
         "psr-4": {
@@ -43,6 +46,8 @@
         "ci": [
             "composer validate",
             "@check-cs",
+            "tests/Symfony/console ca:cl -e test",
+            "@phpstan",
             "@phpunit"
         ],
         "check-cs": [
@@ -53,11 +58,17 @@
         ],
         "phpunit": [
             "phpunit"
+        ],
+        "phpstan": [
+            "phpstan analyse -c phpstan.neon"
         ]
     },
     "config": {
         "platform": {
             "php": "8.1"
+        },
+        "allow-plugins": {
+            "symfony/runtime": true
         }
     }
 }

phpstan.neon

@@ -0,0 +1,13 @@
+includes:
+	- vendor/phpstan/phpstan/conf/bleedingEdge.neon
+	- vendor/phpstan/phpstan-symfony/extension.neon
+	- vendor/phpstan/phpstan-symfony/rules.neon
+
+parameters:
+	phpVersion: 80100
+	level: max
+	paths:
+		- src
+		- tests
+	symfony:
+		containerXmlPath: var/cache/test/Chaos_Monkey_Symfony_Tests_Symfony_KernelTestDebugContainer.xml

src/DependencyInjection/ChaosMonkeyExtension.php

@@ -9,20 +9,42 @@
 use Symfony\Component\DependencyInjection\Extension\Extension;
 use Symfony\Component\DependencyInjection\Loader\XmlFileLoader;
 
+/**
+ * @phpstan-type ConfigArray array{
+ *     enabled: bool,
+ *     probability: int,
+ *     assaults: array{
+ *      latency: array{active: bool, minimum: int, maximum: int},
+ *      memory: array{active: bool, fill_fraction: float},
+ *      exception: array{active: bool, class: class-string<\Throwable>},
+ *      kill_app: array{active: bool}
+ *     },
+ *     watchers: array{
+ *      request: array{enabled: bool, priority: int}
+ *     }
+ * }
+ */
 class ChaosMonkeyExtension extends Extension
 {
-    public function load(array $configs, ContainerBuilder $container)
+    /**
+     * @param array<array<mixed>> $configs
+     */
+    public function load(array $configs, ContainerBuilder $container): void
     {
         $loader = new XmlFileLoader($container, new FileLocator(__DIR__.'/../Resources/config'));
         $loader->load('services.xml');
 
         $configuration = new Configuration();
+        /** @var ConfigArray $config */
         $config = $this->processConfiguration($configuration, $configs);
 
         $this->setChaosMonkeySettings($container, $config);
         $this->enableWatchers($container, $config);
     }
 
+    /**
+     * @param ConfigArray $config
+     */
     private function setChaosMonkeySettings(ContainerBuilder $container, array $config): void
     {
         $definition = $container->getDefinition('chaos_monkey.settings');
@@ -42,6 +64,9 @@ private function setChaosMonkeySettings(ContainerBuilder $container, array $conf
         $definition->addMethodCall('setKillAppActive', [$config['assaults']['kill_app']['active']]);
     }
 
+    /**
+     * @param ConfigArray $config
+     */
     private function enableWatchers(ContainerBuilder $container, array $config): void
     {
         if ($config['watchers']['request']['enabled'] === true) {