Add a test case for type casting to the equality helper tests.

src/renderer/renderer.rs

@@ -1012,6 +1012,7 @@ impl<'a> DustRenderer<'a> {
 
         let left_side = self.tap(breadcrumbs, &param_map, "key");
         let right_side = self.tap(breadcrumbs, &param_map, "value");
+        let type_cast = self.tap(breadcrumbs, &param_map, "type");
 
         let left_side_ce = left_side.as_ref().map(|maybe_ice| {
             maybe_ice
@@ -1023,6 +1024,15 @@ impl<'a> DustRenderer<'a> {
                 .as_ref()
                 .map(|ice| ice.get_context_element_reference())
         });
+        let type_rendered = match type_cast.as_ref().map(|maybe_ice| {
+            maybe_ice
+                .as_ref()
+                .map(|ice| ice.get_context_element_reference())
+                .map(|ce| ce.render(&Vec::new()))
+        }) {
+            Some(Ok(Ok(val))) => Some(val),
+            _ => None,
+        };
         if left_side_ce.is_none() {
             // If key did not exist at all, return None
             return None;