Update PHPUnit and make tests green again on PHP 8

with recent versions of Symfony (5, 6) and SerializerBundle (3, 4, 5).
Please note that while unit tests are passing this version is not
thorougly tested and may not work in real world scenarios.
Last battle tested versions are Symfony 4 and SerializerBundle 2.

Author: Christoph Singer

DependencyInjection/Configuration.php

@@ -17,8 +17,8 @@ class Configuration implements ConfigurationInterface
      */
     public function getConfigTreeBuilder()
     {
-        $treeBuilder = new TreeBuilder();
-        $rootNode = $treeBuilder->root('wa72_json_rpc');
+        $treeBuilder = new TreeBuilder('wa72_json_rpc');
+        $rootNode = $treeBuilder->getRootNode();
 
         $rootNode
             ->children()

Tests/Fixtures/app/Wa72JsonRpcBundleTestKernel.php

@@ -5,7 +5,7 @@
 
 class Wa72JsonRpcBundleTestKernel extends Kernel
 {
-    public function registerBundles()
+    public function registerBundles(): iterable
     {
         return array(
             new JMS\SerializerBundle\JMSSerializerBundle(),
@@ -22,15 +22,15 @@ public function registerContainerConfiguration(LoaderInterface $loader)
     /**
      * @return string
      */
-    public function getCacheDir()
+    public function getCacheDir(): string
     {
         return sys_get_temp_dir().'/Wa72JsonRpcBundle/cache';
     }
 
     /**
      * @return string
      */
-    public function getLogDir()
+    public function getLogDir(): string
     {
         return sys_get_temp_dir().'/Wa72JsonRpcBundle/logs';
     }

Tests/JsonRpcControllerTest.php

@@ -20,7 +20,7 @@ class JsonRpcControllerTest extends \PHPUnit\Framework\TestCase {
      */
     private $controller;
 
-    public function setUp()
+    public function setUp(): void
     {
         $config = array(
             'functions' => array(
@@ -193,7 +193,7 @@ private function makeRequest($controller, $requestdata)
     /**
      * Shuts the kernel down if it was used in the test.
      */
-    protected function tearDown()
+    protected function tearDown(): void
     {
         if (null !== $this->kernel) {
             $this->kernel->shutdown();

composer.json

@@ -13,13 +13,15 @@
         }
     ],
     "require":{
-        "php":">=5.4",
-        "symfony/framework-bundle":"^2.7|^3|^4",
+        "php":">=7.4",
+        "ext-json": "*",
+        "symfony/framework-bundle":"^3|^4|^5|^6",
         "symfony/yaml": "*",
-        "jms/serializer-bundle":"^1.1|^2|^3"
+        "jms/serializer-bundle":"^2|^3|^4|^5"
     },
     "require-dev": {
-        "phpunit/phpunit": "^4|^5|^6|^7"
+        "phpunit/phpunit": "^9",
+        "doctrine/annotations": "^1.0"
     },
     "autoload":{
         "psr-0":{
@@ -28,4 +30,3 @@
     },
     "target-dir": "Wa72/JsonRpcBundle"
 }
-

phpunit.xml.dist

@@ -1,20 +1,18 @@
 <?xml version="1.0" encoding="UTF-8"?>
-
-<phpunit colors="true" bootstrap="Tests/bootstrap.php">
-    <testsuites>
-        <testsuite name="Wa72JsonRpcBundle Test Suite">
-            <directory suffix="Test.php">./Tests/</directory>
-        </testsuite>
-    </testsuites>
-
-    <filter>
-        <whitelist>
-            <directory suffix=".php">./</directory>
-	    <exclude>
-		<directory>./Resources</directory>
-		<directory>./Tests</directory>
-		<directory>./vendor</directory>
-	    </exclude>
-        </whitelist>
-    </filter>
+<phpunit xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" colors="true" bootstrap="Tests/bootstrap.php" xsi:noNamespaceSchemaLocation="https://schema.phpunit.de/9.3/phpunit.xsd">
+  <coverage>
+    <include>
+      <directory suffix=".php">./</directory>
+    </include>
+    <exclude>
+      <directory>./Resources</directory>
+      <directory>./Tests</directory>
+      <directory>./vendor</directory>
+    </exclude>
+  </coverage>
+  <testsuites>
+    <testsuite name="Wa72JsonRpcBundle Test Suite">
+      <directory suffix="Test.php">./Tests/</directory>
+    </testsuite>
+  </testsuites>
 </phpunit>