Add invalid choice handling to convert choice

Author: collijk

CHANGELOG.md

@@ -4,6 +4,8 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/), and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
 ## [Unreleased]
+### Fixed
+- Add invalid choice handling to `convert_choice`.
 
 ## [1.0.16] - 2024-12-30
 ### Fixed

src/rra_tools/cli_tools/options.py

@@ -30,7 +30,11 @@ def convert_choice(value: str, choices: Collection[str]) -> list[str]:
     """
     if value == RUN_ALL:
         return list(choices)
-    return [value]
+    elif value in choices:
+        return [value]
+    else:
+        msg = f"Invalid choice: {value}. Must be one of {choices} or {RUN_ALL}."
+        raise ValueError(msg)
 
 
 def process_choices(