I think its working

src/renderer/renderer.rs

@@ -139,30 +139,18 @@ mod tests {
         fn walk(&self, segment: &str) -> &dyn ContextElement {
             self.get(segment).unwrap()
         }
-
-        fn val(&self) -> String {
-            "val".to_owned()
-        }
     }
 
     impl Walkable for &str {
         fn walk(&self, segment: &str) -> &dyn ContextElement {
             panic!("Tried to walk down a str");
         }
-
-        fn val(&self) -> String {
-            "val".to_owned()
-        }
     }
 
     impl Walkable for u32 {
         fn walk(&self, segment: &str) -> &dyn ContextElement {
             panic!("Tried to walk down a str");
         }
-
-        fn val(&self) -> String {
-            "val".to_owned()
-        }
     }
 
     fn do_the_walk<'a>(
@@ -172,7 +160,7 @@ mod tests {
         let mut output = context;
 
         for elem in path.iter() {
-            output = context.walk(elem);
+            output = output.walk(elem);
         }
 
         output
@@ -199,9 +187,9 @@ mod tests {
         .collect();
         assert_eq!(do_the_walk(&context, &vec!["cat"]).render(), "kitty");
         assert_eq!(do_the_walk(&number_context, &vec!["tiger"]).render(), "3");
-        // assert_eq!(
-        //     do_the_walk(&deep_context, &vec!["tiger", "food"]).render(),
-        //     "people"
-        // );
+        assert_eq!(
+            do_the_walk(&deep_context, &vec!["tiger", "food"]).render(),
+            "people"
+        );
     }
 }

src/renderer/walkable.rs

@@ -1,9 +1,8 @@
 use super::renderable::Renderable;
+use std::fmt::Debug;
 
-pub trait ContextElement: Walkable + Renderable {}
+pub trait ContextElement: Walkable + Renderable + Debug {}
 
 pub trait Walkable {
     fn walk(&self, segment: &str) -> &dyn ContextElement;
-
-    fn val(&self) -> String;
 }