POC how to use traits for injecting functionality to objects

ModuleInjectorTest.php

<?php
/**
 * Created by JetBrains PhpStorm.
 * User: gpawlik
 * Date: 4/18/13
 * Time: 4:42 PM
 * To change this template use File | Settings | File Templates.
 */

class ModuleInjectorTest extends PHPUnit_Framework_TestCase {

    public function testTrue()
    {
        $this->assertTrue(true);
    }

    public function testInjectingPlugin()
    {
        $class = new SomeClass();
        $this->assertTrue($class->inject(new Module()));
    }

    public function testCanCallInjectedModule()
    {
        $class = new SomeClass();
        $class->inject(new Module());
        $this->assertEquals(
            999,
            $class->doAndReturn(999)
        );
    }
}

class Module {
    public function doAndReturn($par)
    {
        return $par;
    }
}


class SomeClass {
    use ComponentInjector;
}

trait ComponentInjector {
    private $modules = array();

    public function inject($component){
        $this->modules[] = $component;
        return true;
    }

    public function __call($name, $arguments)
    {
        foreach($this->modules as $module) {
            if(method_exists($module, $name)) {
                return call_user_func_array(array($module, $name), $arguments);
            }
        }
    }
}

points to consider:

• should it call first method found among components or all?
• if latter - how to make it run even if original object has called method?
• maybe modules should register methods (inject(new Module(), 'doAndReturn;), and on trying to inject into class which already has that method thow exception?

finally - all three are possible by implementing different types of ComponentInjector traits