Better error message when traversal fails

simplistix · Nov 29, 2023 · 920ba0a · 920ba0a
1 parent 7fcbc3d
commit 920ba0a
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diff --git a/testfixtures/resolve.py b/testfixtures/resolve.py
@@ -61,6 +61,8 @@ def resolve(dotted_name: str, container: Optional[Any] = None) -> Resolved:
             else:
                 found = getattr(found, name)
                 setter = getattr
+            if found is not_there:
+                break
     return Resolved(container, setter, name, found)
 
 

diff --git a/testfixtures/tests/test_replace.py b/testfixtures/tests/test_replace.py
@@ -686,6 +686,11 @@ def test_constant(self):
             from .sample3 import SOME_CONSTANT as sample3_some_constant
             compare(sample3_some_constant, expected=43)
 
+    def test_relative_nested_but_not_present(self):
+        nested = {'b': [1, 2, 3]}
+        with Replacer() as r:
+            with ShouldRaise(AttributeError("Original 'a' not found")):
+                r(container=nested, target='.a.1', replacement=42)
 
 class TestEnviron: