Add tests for for loop

Signed-off-by: Marcel Müller <neikos@neikos.email>

tests/file_tests.rs

@@ -4,6 +4,7 @@ use nomo::Context;
 
 #[derive(serde::Serialize)]
 struct Info {
+    input: String,
     context: HashMap<String, serde_json::Value>,
 }
 
@@ -26,6 +27,7 @@ fn check_cases() {
         };
 
         settings.set_info(&Info {
+            input: input.to_string(),
             context: map.clone(),
         });