1// Copyright (c) 2017 Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
 2// Copyright (c) 2017 Maxime “pep” Buquet <pep+code@bouah.net>
 3//
 4// This Source Code Form is subject to the terms of the Mozilla Public
 5// License, v. 2.0. If a copy of the MPL was not distributed with this
 6// file, You can obtain one at http://mozilla.org/MPL/2.0/.
 7
 8use std::convert::TryFrom;
 9
10use minidom::Element;
11
12use error::Error;
13
14use ns;
15
16#[derive(Debug, Clone)]
17pub struct Ping;
18
19impl<'a> TryFrom<&'a Element> for Ping {
20    type Error = Error;
21
22    fn try_from(elem: &'a Element) -> Result<Ping, Error> {
23        if !elem.is("ping", ns::PING) {
24            return Err(Error::ParseError("This is not a ping element."));
25        }
26        for _ in elem.children() {
27            return Err(Error::ParseError("Unknown child in ping element."));
28        }
29        Ok(Ping)
30    }
31}
32
33impl<'a> Into<Element> for &'a Ping {
34    fn into(self) -> Element {
35        Element::builder("ping")
36                .ns(ns::PING)
37                .build()
38    }
39}
40
41#[cfg(test)]
42mod tests {
43    use super::*;
44
45    #[test]
46    fn test_simple() {
47        let elem: Element = "<ping xmlns='urn:xmpp:ping'/>".parse().unwrap();
48        Ping::try_from(&elem).unwrap();
49    }
50
51    #[test]
52    fn test_invalid() {
53        let elem: Element = "<ping xmlns='urn:xmpp:ping'><coucou/></ping>".parse().unwrap();
54        let error = Ping::try_from(&elem).unwrap_err();
55        let message = match error {
56            Error::ParseError(string) => string,
57            _ => panic!(),
58        };
59        assert_eq!(message, "Unknown child in ping element.");
60    }
61
62    #[test]
63    #[ignore]
64    fn test_invalid_attribute() {
65        let elem: Element = "<ping xmlns='urn:xmpp:ping' coucou=''/>".parse().unwrap();
66        let error = Ping::try_from(&elem).unwrap_err();
67        let message = match error {
68            Error::ParseError(string) => string,
69            _ => panic!(),
70        };
71        assert_eq!(message, "Unknown attribute in ping element.");
72    }
73}