ConcretePrototype::copy PHP 메소드

    public function copy()
    {
        return clone $this;
    }

 public function testCopy()
 {
     $str = 'prototype';
     $object1 = new ConcretePrototype($str);
     $this->assertEquals($str, $object1->getName());
     $object2 = $object1->copy();
     $this->assertEquals($str, $object2->getName());
 }