Check alias validity for __contains__

beeware · Feb 26, 2025 · 100412e · 100412e
1 parent 86bf303
commit 100412e
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diff --git a/core/tests/style/pack/test_aliases.py b/core/tests/style/pack/test_aliases.py
@@ -96,6 +96,8 @@ def assert_invalid_alias(alias, direction):
             style.update(**{"direction": direction, alias: END})
         with raises(**raises_kwargs):
             style.update(**{alias: END, "direction": direction})
+        with raises(**raises_kwargs):
+            alias in style
 
     assert_invalid_alias(column_alias, ROW)
     assert_invalid_alias(row_alias, COLUMN)

diff --git a/travertino/src/travertino/properties/aliased.py b/travertino/src/travertino/properties/aliased.py
@@ -92,6 +92,7 @@ def validate(self, obj):
 
     def is_set_on(self, obj):
         self.warn_if_deprecated()
+        self.validate(obj)
 
         return self.other in obj