Issue #3464978 by mondrake: Make PHPStan rule testing use PHPUnit 10

.gitlab-ci/pipeline.yml

-# cspell:ignore cobertura drupaltestbot drupaltestbotpw Dwebdriver logfile XVFB
+# cspell:ignore cobertura drupaltestbot drupaltestbotpw Dwebdriver logfile testdox XVFB
 
 stages:
   - 🗜️ Test
@@ -222,7 +222,7 @@ variables:
     - docker-php-ext-enable pcov
     - cd core/tests/PHPStan
     - composer install
-    - vendor/bin/phpunit tests --coverage-text --colors=never --coverage-cobertura=coverage.cobertura.xml --log-junit junit.xml
+    - vendor/bin/phpunit tests --testdox --coverage-text --colors=never --coverage-cobertura=coverage.cobertura.xml --log-junit junit.xml
   # Default job settings runs a script that junit files in a specific location..
   after_script: []
   artifacts:

core/tests/PHPStan/composer.json

@@ -2,7 +2,7 @@
     "name": "drupal/phpstan-testing",
     "description": "Tests Drupal core's PHPStan rules",
     "require-dev": {
-        "phpunit/phpunit": "^9",
+        "phpunit/phpunit": "^10",
         "phpstan/phpstan": "1.11.8"
     },
     "license": "GPL-2.0-or-later",

core/tests/PHPStan/phpunit.xml.dist

@@ -6,7 +6,7 @@
          beStrictAboutChangesToGlobalState="true"
          failOnWarning="true"
          cacheResult="false"
-         xsi:noNamespaceSchemaLocation="https://schema.phpunit.de/9.3/phpunit.xsd">
+         xsi:noNamespaceSchemaLocation="https://schema.phpunit.de/10.5/phpunit.xsd">
   <php>
     <!-- Set error reporting to E_ALL. -->
     <ini name="error_reporting" value="32767"/>
@@ -19,9 +19,9 @@
     </testsuite>
   </testsuites>
   <!-- Settings for coverage reports. -->
-  <coverage>
+  <source>
     <include>
       <directory>Rules</directory>
     </include>
-  </coverage>
+  </source>
 </phpunit>