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/csi.rs

@@ -0,0 +1,65 @@
+// 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/.
+
+generate_empty_element!(
+    /// Stream:feature sent by the server to advertise it supports CSI.
+    Feature,
+    "csi",
+    CSI
+);
+
+generate_empty_element!(
+    /// Client indicates it is inactive.
+    Inactive,
+    "inactive",
+    CSI
+);
+
+generate_empty_element!(
+    /// Client indicates it is active again.
+    Active,
+    "active",
+    CSI
+);
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+    use crate::ns;
+    use crate::Element;
+    use std::convert::TryFrom;
+
+    #[test]
+    fn test_size() {
+        assert_size!(Feature, 0);
+        assert_size!(Inactive, 0);
+        assert_size!(Active, 0);
+    }
+
+    #[test]
+    fn parsing() {
+        let elem: Element = "<csi xmlns='urn:xmpp:csi:0'/>".parse().unwrap();
+        Feature::try_from(elem).unwrap();
+
+        let elem: Element = "<inactive xmlns='urn:xmpp:csi:0'/>".parse().unwrap();
+        Inactive::try_from(elem).unwrap();
+
+        let elem: Element = "<active xmlns='urn:xmpp:csi:0'/>".parse().unwrap();
+        Active::try_from(elem).unwrap();
+    }
+
+    #[test]
+    fn serialising() {
+        let elem: Element = Feature.into();
+        assert!(elem.is("csi", ns::CSI));
+
+        let elem: Element = Inactive.into();
+        assert!(elem.is("inactive", ns::CSI));
+
+        let elem: Element = Active.into();
+        assert!(elem.is("active", ns::CSI));
+    }
+}