public function testPrepareParamsPost()
 {
     $dummy = new Dummy();
     $result = $dummy->prepareParams('url', array('body' => array('foo' => 'bar', 'baz' => 'biz')), 'post');
     $this->assertEquals('foo=bar&baz=biz', $result[CURLOPT_POSTFIELDS]);
     $params = array('foo' => 'bar', 'baz' => 'biz');
     $result = $dummy->prepareParams('url', array('json' => $params), 'post');
     $this->assertEquals(json_encode($params), $result[CURLOPT_POSTFIELDS]);
     //make sure we don't json encode a json encoded string
     $result = $dummy->prepareParams('url', array('body' => json_encode($params)), 'post');
     $this->assertEquals(json_encode($params), $result[CURLOPT_POSTFIELDS]);
     $params = '<xml><param>1</param></xml>';
     $result = $dummy->prepareParams('url', array('body' => $params), 'post');
     $this->assertEquals($params, $result[CURLOPT_POSTFIELDS]);
 }