Move fixture cache from FixtureDef to SetupState - #14770

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pytest-dev:mainfrom

seifertm:move_fixture_cache_from_fixturedef_to_setupstate

Commits on Jul 24, 2026

fixtures, runner: Store cached fixture values in SetupState, instead of FixtureDef.
seifertm
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fixtures: Convert fixture results to NamedTuples
seifertm
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fixtures: Extracted method to invalidate the cached result of a fixture.
seifertm
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fixtures: Don't allow setting the cached fixture value to None.
seifertm
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fixtures: RequestFixtureDef.cache_key returns the correct cache key.
seifertm
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fixtures: Move methods for manipulating fixture cache from FixtureDef to FixtureRequest.
seifertm
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fixtures: Move determination of fixture value cache keys from FixtureDef to SubRequest
seifertm
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fixtures: Split up methods for cache population depending on whether the result is successful or an exception.
seifertm
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fixtures: Selecting the correct cache key for fixture values is now the responsibility of FixtureRequest.
seifertm
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fixtures: FixtureRequest._set_cached_exception no longer requires the traceback
seifertm
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fixtures: Rename _set_cached_result and _set_cached_exception to _cache_value and _cache_exception, respectively
seifertm
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fixtures: Convert FixtureRequest._cache_key into a property
seifertm
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docs: Add news fragment
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setuponly, runner: Move track currently active fixture param as part of SetupState, instead of FixtureDef.
seifertm
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fixtures: Rename cache_key to active_param or param to be more explicit about the contents of the cache key.
seifertm
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fixtures: Use sentinel value for non-existant fixture params when caching fixture results to distinguish between *no param* and *None*.
seifertm
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fixtures, setuponly: Reuse SetupState.fixture_cache to track active params for --setup-show.
seifertm
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fixtures: Address typing error for generic namedtuples in Python 3.10
seifertm
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fixtures: Replace mentions of FixtureDef.cached_result in the docs
seifertm
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setuponly: Add test for suppressing capture.
seifertm
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setuponly: Adds assertion that the cached fixture value cannot be empty in pytest_fixture_post_finalizer.
seifertm
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setuponly: _show_fixture_action directly receives the fixture param rather than fetching it from the cache.
seifertm
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[pre-commit.ci] auto fixes from pre-commit.com hooks
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changelog: Clarify wording in news fragment

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pyproject: Ignore additional TYPE_CHECKING expressions from coverage.
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Move fixture cache from FixtureDef to SetupState - #14770

Move fixture cache from FixtureDef to SetupState#14770
seifertm wants to merge 25 commits into
pytest-dev:mainfrom
seifertm:move_fixture_cache_from_fixturedef_to_setupstate

Commits on Jul 24, 2026

fixtures, runner: Store cached fixture values in SetupState, instead of FixtureDef.

fixtures: Convert fixture results to NamedTuples

fixtures: Extracted method to invalidate the cached result of a fixture.

fixtures: Don't allow setting the cached fixture value to None.

fixtures: RequestFixtureDef.cache_key returns the correct cache key.

fixtures: Move methods for manipulating fixture cache from FixtureDef to FixtureRequest.

fixtures: Move determination of fixture value cache keys from FixtureDef to SubRequest

fixtures: Split up methods for cache population depending on whether the result is successful or an exception.

fixtures: Selecting the correct cache key for fixture values is now the responsibility of FixtureRequest.

fixtures: FixtureRequest._set_cached_exception no longer requires the traceback

fixtures: Rename _set_cached_result and _set_cached_exception to _cache_value and _cache_exception, respectively

fixtures: Convert FixtureRequest._cache_key into a property

docs: Add news fragment

setuponly, runner: Move track currently active fixture param as part of SetupState, instead of FixtureDef.

fixtures: Rename cache_key to active_param or param to be more explicit about the contents of the cache key.

fixtures: Use sentinel value for non-existant fixture params when caching fixture results to distinguish between no param and None.

fixtures, setuponly: Reuse SetupState.fixture_cache to track active params for --setup-show.

fixtures: Address typing error for generic namedtuples in Python 3.10

fixtures: Replace mentions of FixtureDef.cached_result in the docs

setuponly: Add test for suppressing capture.

setuponly: Adds assertion that the cached fixture value cannot be empty in pytest_fixture_post_finalizer.

setuponly: _show_fixture_action directly receives the fixture param rather than fetching it from the cache.

[pre-commit.ci] auto fixes from pre-commit.com hooks

changelog: Clarify wording in news fragment

pyproject: Ignore additional TYPE_CHECKING expressions from coverage.