Rename the xmpp-parsers directory to parsers

This doesn’t change anything to the name of the crate, just makes
autocompletion easier by not sharing the same prefix as the xmpp crate.

parsers/src/jid_prep.rs

@@ -0,0 +1,78 @@
+// Copyright (c) 2019 Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
+//
+// This Source Code Form is subject to the terms of the Mozilla Public
+// License, v. 2.0. If a copy of the MPL was not distributed with this
+// file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+use crate::iq::{IqGetPayload, IqResultPayload};
+use crate::util::helpers::{JidCodec, Text};
+use jid::Jid;
+
+generate_element!(
+    /// Request from a client to stringprep/PRECIS a string into a JID.
+    JidPrepQuery, "jid", JID_PREP,
+    text: (
+        /// The potential JID.
+        data: Text<String>
+    )
+);
+
+impl IqGetPayload for JidPrepQuery {}
+
+impl JidPrepQuery {
+    /// Create a new JID Prep query.
+    pub fn new<J: Into<String>>(jid: J) -> JidPrepQuery {
+        JidPrepQuery { data: jid.into() }
+    }
+}
+
+generate_element!(
+    /// Response from the server with the stringprep’d/PRECIS’d JID.
+    JidPrepResponse, "jid", JID_PREP,
+    text: (
+        /// The JID.
+        jid: JidCodec<Jid>
+    )
+);
+
+impl IqResultPayload for JidPrepResponse {}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+    use crate::Element;
+    use jid::FullJid;
+    use std::convert::TryFrom;
+
+    #[cfg(target_pointer_width = "32")]
+    #[test]
+    fn test_size() {
+        assert_size!(JidPrepQuery, 12);
+        assert_size!(JidPrepResponse, 40);
+    }
+
+    #[cfg(target_pointer_width = "64")]
+    #[test]
+    fn test_size() {
+        assert_size!(JidPrepQuery, 24);
+        assert_size!(JidPrepResponse, 80);
+    }
+
+    #[test]
+    fn simple() {
+        let elem: Element = "<jid xmlns='urn:xmpp:jidprep:0'>ROMeo@montague.lit/orchard</jid>"
+            .parse()
+            .unwrap();
+        let query = JidPrepQuery::try_from(elem).unwrap();
+        assert_eq!(query.data, "ROMeo@montague.lit/orchard");
+
+        let elem: Element = "<jid xmlns='urn:xmpp:jidprep:0'>romeo@montague.lit/orchard</jid>"
+            .parse()
+            .unwrap();
+        let response = JidPrepResponse::try_from(elem).unwrap();
+        assert_eq!(
+            response.jid,
+            FullJid::new("romeo", "montague.lit", "orchard")
+        );
+    }
+}