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Add regression test for NamedTuple with recursive bound #18399

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Jan 6, 2025
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Add regression test for NamedTuple with recursive bound #18399

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14 changes: 14 additions & 0 deletions test-data/unit/check-namedtuple.test
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Original file line number Diff line number Diff line change
Expand Up @@ -1460,3 +1460,17 @@ Func = NamedTuple('Func', [
])
[builtins fixtures/tuple.pyi]
[typing fixtures/typing-namedtuple.pyi]

[case testGenericNamedTupleRecursiveBound]
from typing import Generic, NamedTuple, TypeVar
T = TypeVar("T", bound="NT")
class NT(NamedTuple, Generic[T]):
parent: T
item: int

def main(n: NT[T]) -> None:
reveal_type(n.parent) # N: Revealed type is "T`-1"
reveal_type(n.item) # N: Revealed type is "builtins.int"

[builtins fixtures/tuple.pyi]
[typing fixtures/typing-namedtuple.pyi]
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