public function should_sign_request()
{
$auth = $this->request->sign($this->token);
$this->assertEquals('5.1.2', $auth['auth_version']);
$this->assertEquals('abc123', $auth['auth_key']);
$this->assertEquals('1412506800', $auth['auth_timestamp']);
$this->assertRegExp('/[a-z0-9]{64}/', $auth['auth_signature']);
}