Added the signature for passing filters into the render function.

Added the signature for passing filters into the render function but I am not yet using the filters.

src/renderer/renderable.rs

@@ -1,5 +1,6 @@
+use crate::parser::Filter;
 use crate::renderer::errors::RenderError;
 
 pub trait Renderable {
-    fn render(&self) -> Result<String, RenderError>;
+    fn render(&self, filters: &Vec<Filter>) -> Result<String, RenderError>;
 }

src/renderer/renderer.rs

@@ -90,7 +90,7 @@ impl<'a> DustRenderer<'a> {
                     // If reference does not exist in the context, it becomes an empty string
                     return Ok("".to_owned());
                 } else {
-                    return val?.render();
+                    return val?.render(&reference.filters);
                 }
             }
             _ => (), // TODO: Implement the rest
@@ -115,6 +115,7 @@ fn walk_path<'a>(
 #[cfg(test)]
 mod tests {
     use super::*;
+    use crate::parser::Filter;
 
     #[test]
     fn test_walk_path() {
@@ -123,19 +124,22 @@ mod tests {
         impl<I: ContextElement> ContextElement for HashMap<&str, I> {}
 
         impl Renderable for u32 {
-            fn render(&self) -> Result<String, RenderError> {
+            fn render(&self, filters: &Vec<Filter>) -> Result<String, RenderError> {
+                // TODO: handle the filters
                 Ok(self.to_string())
             }
         }
 
         impl Renderable for &str {
-            fn render(&self) -> Result<String, RenderError> {
+            fn render(&self, filters: &Vec<Filter>) -> Result<String, RenderError> {
+                // TODO: handle the filters
                 Ok(self.to_string())
             }
         }
 
         impl<I: ContextElement> Renderable for HashMap<&str, I> {
-            fn render(&self) -> Result<String, RenderError> {
+            fn render(&self, filters: &Vec<Filter>) -> Result<String, RenderError> {
+                // TODO: handle the filters
                 Err(RenderError::CantRender { elem: self })
             }
         }
@@ -186,20 +190,23 @@ mod tests {
         .cloned()
         .collect();
         assert_eq!(
-            walk_path(&context, &vec!["cat"]).unwrap().render().unwrap(),
+            walk_path(&context, &vec!["cat"])
+                .unwrap()
+                .render(&Vec::new())
+                .unwrap(),
             "kitty".to_owned()
         );
         assert_eq!(
             walk_path(&number_context, &vec!["tiger"])
                 .unwrap()
-                .render()
+                .render(&Vec::new())
                 .unwrap(),
             "3".to_owned()
         );
         assert_eq!(
             walk_path(&deep_context, &vec!["tiger", "food"])
                 .unwrap()
-                .render()
+                .render(&Vec::new())
                 .unwrap(),
             "people".to_owned()
         );