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test_ok2/changelog/7469.feature.rst

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mark: export pytest.Mark for typing purposes The type cannot be constructed directly, but is exported for use in type annotations, since it is reachable through existing public API.
2020-12-20 04:19:51 +08:00
The types of objects used in pytest's API are now exported so they may be used in type annotations.
The newly-exported types are:
- ``pytest.Mark`` for :class:`marks <pytest.Mark>`.
mark: export pytest.MarkDecorator for typing purposes The type cannot be constructed directly, but is exported for use in type annotations, since it is reachable through existing public API.
2020-12-20 21:11:01 +08:00
- ``pytest.MarkDecorator`` for :class:`mark decorators <pytest.MarkDecorator>`.
mark: export pytest.MarkGenerator for typing purposes The type cannot be constructed directly, but is exported for use in type annotations, since it is reachable through existing public API.
2020-12-20 21:36:24 +08:00
- ``pytest.MarkGenerator`` for the :class:`pytest.mark <pytest.MarkGenerator>` singleton.
code: export ExceptionInfo for typing purposes This type is most prominent in `pytest.raises` and we should allow to refer to it by a public name. The type is not in a perfectly "exposable" state. In particular: - The `traceback` property with type `Traceback` which is derived from the `py.code` API and exposes a bunch more types transitively. This stuff is *not* exported and probably won't be. - The `getrepr` method which probably should be private. But they're already used in the wild so no point in just hiding them now. The __init__ API is hidden -- the public API for this are the `from_*` classmethods.
2021-03-13 17:10:34 +08:00
- ``pytest.Metafunc`` for the :class:`metafunc <pytest.MarkGenerator>` argument to the :func:`pytest_generate_tests <pytest.hookspec.pytest_generate_tests>` hook.
- ``pytest.CallInfo`` for the :class:`CallInfo <pytest.CallInfo>` type passed to various hooks.
- ``pytest.ExceptionInfo`` for the :class:`ExceptionInfo <pytest.ExceptionInfo>` type returned from :func:`pytest.raises` and passed to various hooks.
mark: export pytest.Mark for typing purposes The type cannot be constructed directly, but is exported for use in type annotations, since it is reachable through existing public API.
2020-12-20 04:19:51 +08:00
Constructing them directly is not supported; they are only meant for use in type annotations.
Doing so will emit a deprecation warning, and may become a hard-error in pytest 7.0.
Subclassing them is also not supported. This is not currently enforced at runtime, but is detected by type-checkers such as mypy.