Added phpdoc for all methods and added the typehint for the FormatterInterface

src/Monolog/Handler/TestHandler.php

@@ -82,9 +82,13 @@ class TestHandler extends AbstractHandler
                 return true;
             }
         }
+
         return false;
     }
 
+    /**
+     * {@inheritdoc}
+     */
     public function write(array $record)
     {
         $this->recordsByLevel[$record['level']][] = $record;