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[red-knot] Move tuple containing Never tests (#17137)

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https://github.com/astral-sh/ruff/pull/17094#discussion_r2023682840
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Dhruv Manilawala 2025-04-02 08:16:18 +05:30 • committed by GitHub
parent eb3e176309
commit f63024843c
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2 changed files with 5 additions and 15 deletions
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15
crates/red_knot_python_semantic/resources/mdtest/annotations/tuple.md
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@ -1,15 +0,0 @@
# Tuple
## `Never`
If a tuple type contains a `Never` element, then it is eagerly simplified to `Never` which means
that a tuple type containing `Never` is disjoint from any other tuple type.
```py
from typing_extensions import Never
def _(x: tuple[Never], y: tuple[int, Never], z: tuple[Never, int]):
reveal_type(x) # revealed: Never
reveal_type(y) # revealed: Never
reveal_type(z) # revealed: Never
```

5
crates/red_knot_python_semantic/resources/mdtest/type_properties/tuples_containing_never.md
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@ -19,6 +19,11 @@ static_assert(is_equivalent_to(Never, tuple[int, Never]))
static_assert(is_equivalent_to(Never, tuple[int, Never, str]))
static_assert(is_equivalent_to(Never, tuple[int, tuple[str, Never]]))
static_assert(is_equivalent_to(Never, tuple[tuple[str, Never], int]))
def _(x: tuple[Never], y: tuple[int, Never], z: tuple[Never, int]):
reveal_type(x) # revealed: Never
reveal_type(y) # revealed: Never
reveal_type(z) # revealed: Never
```
The empty `tuple` is *not* equivalent to `Never`!