From 69f747ee8fd7be9a18f867a492f632b867316258 Mon Sep 17 00:00:00 2001
From: Matthias Beyer <mail@beyermatthias.de>
Date: Fri, 28 Feb 2020 22:25:56 +0100
Subject: Add mailtree testing functions

Signed-off-by: Matthias Beyer <mail@beyermatthias.de>
---
 lib/domain/libimagmail/src/mailtree.rs | 95 ++++++++++++++++++++++++++++++++++
 1 file changed, 95 insertions(+)

diff --git a/lib/domain/libimagmail/src/mailtree.rs b/lib/domain/libimagmail/src/mailtree.rs
index 944a0c4b..570fcda6 100644
--- a/lib/domain/libimagmail/src/mailtree.rs
+++ b/lib/domain/libimagmail/src/mailtree.rs
@@ -249,3 +249,98 @@ impl<'a> Iterator for Traverse<'a> {
     }
 }
 
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn test_traverse_with() {
+        let data      = String::from("test");
+        let mut arena = Arena::new();
+        let root      = arena.new_node(data);
+        let mailtree  = Mailtree {
+            arena,
+            root: root.clone()
+        };
+
+        let t = Traverse::with(&mailtree);
+
+        assert_eq!(t.next_node, Some(root));
+        assert_eq!(t.next_indent, 0);
+    }
+
+    fn make_testing_mailtree(data: String) -> (NodeId, Mailtree) {
+        let mut arena = Arena::new();
+        let root      = arena.new_node(data);
+
+        (root.clone(), Mailtree { arena, root: root })
+    }
+
+    #[test]
+    fn test_traverse_get_node() {
+        let (root_id, mt) = make_testing_mailtree(String::from("test"));
+        let t = Traverse::with(&mt);
+        let root = t.get_node(root_id);
+        assert!(root.is_some());
+        assert_eq!(root.unwrap(), "test");
+    }
+
+    #[test]
+    fn test_traverse_get_current_node() {
+        let (_, mt) = make_testing_mailtree(String::from("test"));
+        let t = Traverse::with(&mt);
+        let node = t.get_current_node();
+
+        assert!(node.is_some());
+        let node = node.unwrap();
+
+        assert_eq!(node.get(), "test");
+        assert!(node.parent().is_none());
+        assert!(node.first_child().is_none());
+        assert!(node.last_child().is_none());
+        assert!(node.previous_sibling().is_none());
+        assert!(node.next_sibling().is_none());
+        assert!(!node.is_removed());
+    }
+
+    #[test]
+    fn test_traverse_current_node_next_sibling() {
+        let (_, mt) = make_testing_mailtree(String::from("test"));
+        let t = Traverse::with(&mt);
+        assert!(t.current_node_next_sibling().is_none());
+    }
+
+    #[test]
+    fn test_traverse_current_node_first_child() {
+        let (_, mt) = make_testing_mailtree(String::from("test"));
+        let t = Traverse::with(&mt);
+        assert!(t.current_node_first_child().is_none());
+    }
+
+    #[test]
+    fn test_traverse_current_node_parent() {
+        let (_, mt) = make_testing_mailtree(String::from("test"));
+        let t = Traverse::with(&mt);
+        assert!(t.current_node_parent().is_none());
+    }
+
+
+    //
+    // non-simple tests
+    //
+
+    #[test]
+    fn test_iteration() {
+        let data = ["1", "2", "3", "4"];
+        let (_, mt) = Mailtree::fill_from_iter(data.iter().map(ToString::to_string)).unwrap();
+        let mut t  = Traverse::with(&mt);
+
+        assert_eq!(t.next().unwrap(), (0, String::from("1")));
+        assert_eq!(t.next().unwrap(), (1, String::from("2")));
+        assert_eq!(t.next().unwrap(), (2, String::from("3")));
+        assert_eq!(t.next().unwrap(), (3, String::from("4")));
+        assert!(t.next().is_none());
+    }
+
+}
+
-- 
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