ReflectionTrait.php

<?php
// tests/App/ReflectionTrait.php
namespace App\Tests;

trait ReflectionTrait
{
    /**
     * @param $object
     * @param $methodName
     * @param array $parameters
     * @return mixed
     */
    public function invokeMethod(&$object, $methodName, array $parameters = [])
    {
        $reflection = $this->createReflection($object);
        $method = $reflection->getMethod($methodName);
        $method->setAccessible(true);

        return $method->invokeArgs($object, $parameters);
    }

    /**
     * @param $class
     * @return \ReflectionClass
     * @throws \ReflectionException
     */
    protected function createReflection($class)
    {
        if (is_object($class)) {
            $class = get_class($class);
        }

        return new \ReflectionClass($class);
    }

    /**
     * @param $object
     * @param $propertyName
     * @return mixed
     */
    public function getProperty(&$object, $propertyName)
    {
        $reflection = $this->createReflection($object);
        $property = $reflection->getProperty($propertyName);
        $property->setAccessible(true);

        return $property->getValue($object);
    }

    /**
     * @param $object
     * @param $propertyName
     * @param $value
     */
    public function setProperty(&$object, $propertyName, $value)
    {
        $reflection = $this->createReflection($object);
        $property = $reflection->getProperty($propertyName);
        $property->setAccessible(true);
        $property->setValue($object, $value);
    }
}