Allow empty dictionaries from info and case_info

Author: tovrstra

docs/changelog.md

@@ -7,6 +7,11 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+### Fixed
+
+- Modify the script driver so that `info` and `case_info` may return empty dictionaries.
+
+
 ## [1.2.7] - 2024-06-24 {: #v1.2.7 }
 
 ### Fixed

stepup/core/script.py

@@ -211,8 +211,8 @@ def get_info(self) -> dict:
         if not self._has_single:
             raise NotImplementedError("get_info only works for scripts with an info function")
         info = self._object.info()
-        if not isinstance(info, dict) or len(info) == 0:
-            raise TypeError("info must return a non-empty dictionary.")
+        if not isinstance(info, dict):
+            raise TypeError("info must return a dictionary.")
         return info
 
     def get_plan(self) -> tuple[list[str], list[str], list[str]]:
@@ -261,8 +261,8 @@ def get_case_info(self, *args, **kwargs) -> dict:
         if not self._has_cases:
             raise NotImplementedError("get_case_info only works for scripts with multiple cases")
         info = self._object.case_info(*args, **kwargs)
-        if not isinstance(info, dict) or len(info) == 0:
-            raise TypeError("case_info must return a non-empty dictionary.")
+        if not isinstance(info, dict):
+            raise TypeError("case_info must return a dictionary.")
         return info
 
     def get_case_plan(self, *args, **kwargs) -> tuple[list[str], list[str], list[str]]: