Elastica\Connection::setCompression PHP Method

    public function setCompression($compression = null)
    {
        return $this->setParam('compression', $compression);
    }

 /**
  * @group unit
  */
 public function testCompression()
 {
     $connection = new Connection();
     $this->assertFalse($connection->hasCompression());
     $connection->setCompression(true);
     $this->assertTrue($connection->hasCompression());
 }