[ci] add compat test

Author: TomasVotruba

.github/workflows/compat_test.yaml

@@ -0,0 +1,34 @@
+# builds the content of https://github.com/rectorphp/rector
+# inspiration from https://github.com/phpstan/phpstan-src/blob/master/.github/workflows/phar.yml
+name: PHPUnit and PHPStan Compat Test
+
+on:
+    push:
+        branches:
+            - main
+    pull_request: null
+
+jobs:
+    build_scoped_rector:
+        runs-on: ubuntu-latest
+        timeout-minutes: 3
+
+        steps:
+            -
+                uses: actions/checkout@v4
+                with:
+                    fetch-depth: 0
+
+            -
+                uses: shivammathur/setup-php@v2
+                with:
+                    php-version: 8.2
+                    coverage: none
+
+            - run: composer create-project "rector/rector-compat-tests:dev-main" .
+
+            - run: vendor/bin/phpunit tests/PHPStan
+
+            - run: vendor/bin/phpunit tests/PHPUnit
+
+            - run:  vendor/bin/phpunit tests

rules/CodingStyle/ClassNameImport/NamespaceBeforeClassNameResolver.php

@@ -15,10 +15,6 @@ public function resolve(FullyQualifiedObjectType $fullyQualifiedObjectType): str
 
         return $className === $shortName
             ? ''
-            : substr(
-                $className,
-                0,
-                -strlen($shortName) - 1
-        );
+            : substr($className, 0, -strlen($shortName) - 1);
     }
 }