fix: Literal contained inside non-variadic tuple should not imply "ch…

…oices".

CHANGELOG.md

@@ -2,6 +2,10 @@
 
 ## 0.24
 
+### 0.24.2
+
+- fix: Literal contained inside non-variadic tuple should not imply "choices".
+
 ### 0.24.1
 
 - feat: Add Group.section to enable ordering of groups separately from the items within them.

src/cappa/typing.py

@@ -56,7 +56,7 @@ def detect_choices(type_view: TypeView) -> list[str] | None:
     if type_view.is_subclass_of(enum.Enum):
         return [v.value for v in type_view.annotation]
 
-    if type_view.is_subclass_of((tuple, list, set)):
+    if type_view.is_subclass_of((list, set)) or type_view.is_variadic_tuple:
         type_view = type_view.inner_types[0]
 
     if type_view.is_union:

tests/arg/test_choices.py

@@ -42,3 +42,33 @@ class ArgTest:
 
     result = capsys.readouterr().out
     assert "Valid options: one, two." in result
+
+
+@backends
+def test_variadic_tuple_choices(backend, capsys):
+    @dataclass
+    class ArgTest:
+        choice: Annotated[
+            tuple[Literal["one", "two"], ...] | None, cappa.Arg(short=True)
+        ] = None
+
+    with pytest.raises(cappa.HelpExit):
+        parse(ArgTest, "--help", backend=backend)
+
+    result = capsys.readouterr().out
+    assert "Valid options: one, two." in result
+
+
+@backends
+def test_tuple_choices(backend, capsys):
+    @dataclass
+    class ArgTest:
+        choice: Annotated[
+            tuple[Literal["one", "two"], int] | None, cappa.Arg(short=True)
+        ] = None
+
+    with pytest.raises(cappa.HelpExit):
+        parse(ArgTest, "--help", backend=backend)
+
+    result = capsys.readouterr().out
+    assert "Valid options: one, two." not in result