PHP Trait to be used for testing when invoking private methods is necessary

Trespasser.php

<?php
namespace Test;

trait Trespasser
{
    protected function forceCall($subject, $methodName, ...$parameters)
    {
        $reflection = new \ReflectionMethod($subject, $methodName);
        $reflection->setAccessible(true);
        return $reflection->invokeArgs($subject, $parameters);
    }
}