Add a ping parser.

src/ping.rs

@@ -0,0 +1,53 @@
+use minidom::Element;
+
+use error::Error;
+
+use ns::PING_NS;
+
+#[derive(Debug)]
+pub struct Ping {
+}
+
+pub fn parse_ping(root: &Element) -> Result<Ping, Error> {
+    assert!(root.is("ping", PING_NS));
+    for _ in root.children() {
+        return Err(Error::ParseError("Unknown child in ping element."));
+    }
+    Ok(Ping {  })
+}
+
+#[cfg(test)]
+mod tests {
+    use minidom::Element;
+    use error::Error;
+    use ping;
+
+    #[test]
+    fn test_simple() {
+        let elem: Element = "<ping xmlns='urn:xmpp:ping'/>".parse().unwrap();
+        ping::parse_ping(&elem).unwrap();
+    }
+
+    #[test]
+    fn test_invalid() {
+        let elem: Element = "<ping xmlns='urn:xmpp:ping'><coucou/></ping>".parse().unwrap();
+        let error = ping::parse_ping(&elem).unwrap_err();
+        let message = match error {
+            Error::ParseError(string) => string,
+            _ => panic!(),
+        };
+        assert_eq!(message, "Unknown child in ping element.");
+    }
+
+    #[test]
+    #[ignore]
+    fn test_invalid_attribute() {
+        let elem: Element = "<ping xmlns='urn:xmpp:ping' coucou=''/>".parse().unwrap();
+        let error = ping::parse_ping(&elem).unwrap_err();
+        let message = match error {
+            Error::ParseError(string) => string,
+            _ => panic!(),
+        };
+        assert_eq!(message, "Unknown attribute in ping element.");
+    }
+}