PHP Trait for Testing Protected Methods and Properties

TestProtectedTrait.php

<?php
/**
 * Trait to expose protected methods and properties.
 */
trait TestProtectedTrait
{
    /**
     * Call protected/private method of a class.
     *
     * @param object|string $object Instantiated object that we will run method on or the class name.
     * @param string $methodName Method name to call
     * @param array  $parameters Array of parameters to pass into method.
     * @param bool $static Is a static method?
     *
     * @return mixed Method return.
     */
    public function callProtectedMethod($object, $methodName, array $parameters = array(), $static = false)
    {
        $reflection = new \ReflectionClass($object);
        $method = $reflection->getMethod($methodName);
        $method->setAccessible(true);

        if ($static) {
            $object = null;
        }

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

    /**
     * Get protected/private property value
     *
     * @param object|string $object
     * @param string $propertyName
     * @return mixed
     */
    protected function getProtectedProperty($object, $propertyName) 
    {
        $reflection = new \ReflectionClass($object);
        $property   = $reflection->getProperty($propertyName);
        $property->setAccessible(true);

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