fix return types and column name, add basic test

Author: lcarilla

.idea/workspace.xml

@@ -8,3 +8,13 @@
 /var/
 /vendor/
 ###< symfony/framework-bundle ###
+
+###> symfony/phpunit-bridge ###
+.phpunit.result.cache
+/phpunit.xml
+###< symfony/phpunit-bridge ###
+
+###> phpunit/phpunit ###
+/phpunit.xml
+.phpunit.result.cache
+###< phpunit/phpunit ###

examples/symfony-example/.gitignore

@@ -69,5 +69,11 @@
             "allow-contrib": false,
             "require": "7.2.*"
         }
+    },
+    "require-dev": {
+        "phpunit/phpunit": "^9.5",
+        "symfony/browser-kit": "7.2.*",
+        "symfony/css-selector": "7.2.*",
+        "symfony/phpunit-bridge": "^7.2"
     }
 }