Add a test for gte.

src/renderer/renderer.rs

@@ -334,6 +334,13 @@ impl<'a> DustRenderer<'a> {
                     }
                 }
             }
+            DustTag::DTHelperGreaterThan(parameterized_block) => {
+                let param_map: HashMap<&str, &RValue<'a>> = parameterized_block
+                    .params
+                    .iter()
+                    .map(|pair: &KVPair<'a>| (pair.key, &pair.value))
+                    .collect();
+            }
             _ => (), // TODO: Implement the rest
         }
         Ok("".to_owned())