add: tests for validate_field_names

Author: 7h3cyb3rm0nk

src/static_schema.rs

@@ -195,3 +195,23 @@ fn validate_field_names(field_name: &str, existing_fields: &mut HashSet<String>)
 
     Ok(())
 }
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+    #[test]
+    fn empty_field_names() {
+        let mut existing_field_names: HashSet<String> = HashSet::new();
+        assert!(validate_field_names("", &mut existing_field_names).is_err());
+
+    }
+
+    #[test]
+    fn duplicate_field_names() {
+        let mut existing_field_names: HashSet<String> = HashSet::new();
+        let _ = validate_field_names("test_field", &mut existing_field_names);
+        assert!(validate_field_names("test_field", &mut existing_field_names).is_err());
+    }
+
+    
+}