public function testHeaders()
{
$this->curl->setHeader('Content-Type', 'application/json');
$this->curl->setHeader('X-Requested-With', 'XMLHttpRequest');
$this->curl->setHeader('Accept', 'application/json');
$this->assertTrue($this->server('GET', array('test' => 'server', 'key' => 'CONTENT_TYPE')) === 'application/json');
$this->assertTrue($this->server('GET', array('test' => 'server', 'key' => 'HTTP_X_REQUESTED_WITH')) === 'XMLHttpRequest');
$this->assertTrue($this->server('GET', array('test' => 'server', 'key' => 'HTTP_ACCEPT')) === 'application/json');
}