TST: add test for remove_prefix with bad value

CHANGELOG.md

@@ -28,11 +28,11 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ### Deprecated ###
 
-- The command line argument ``--prefix`` and the ``prefix`` argument of
-  `crawler_main` is deprecated. Use the new argument ``--remove-prefix``
-  instead.
+- The ``prefix`` argument of `crawler_main` is deprecated. Use the new argument
+  ``remove_prefix`` instead.
 
 ### Removed ###
+- The command line argument ``--prefix``. Use the new argument ``--remove-prefix`` instead.
 
 ### Fixed ###
 

unittests/test_tool.py

@@ -982,3 +982,14 @@ def test_deprecated_prefix_option():
                      remove_prefix="to/be/removed")
 
     assert "(deprecated) `prefix` and the `remove_prefix`" in str(ve.value)
+
+
+def test_wrong_remove_prefix_option():
+    """Test that calling the crawler's main function with `remove_prefix` option
+    with a bad value raises the correct error.
+    """
+
+    with raises(RuntimeError) as ve:
+        crawler_main(rfp("test_directories", "examples_article"),
+                     rfp("scifolder_extended.yml"),
+                     remove_prefix="to/be/removed")