CommerceGuys\Zone\Model\Zone::setId PHP Method

    public function setId($id)
    {
        $this->id = $id;
        return $this;
    }

 /**
  * @covers ::getId
  * @covers ::setId
  *
  * @uses \CommerceGuys\Zone\Model\Zone::__construct
  */
 public function testId()
 {
     $this->zone->setId('north_america');
     $this->assertEquals('north_america', $this->zone->getId());
 }