[flake8-pytest-style] Fix defaults when lint.flake8-pytest-style config section is empty (PT001, PT023)

[dizzy57]

Summary

The documentation states that lint.flake8-pytest-style.*-parentheses options default to false, but if the user provides an empty [lint.flake8-pytest-style] config section, those options are suddenly set to true.

This is a bug. After #12838 changed the defaults, Flake8PytestStyleOptions::try_into_settings wasn't updated and still relies on the preview mode to set the defaults.

Reproduction

% ruff --version
ruff 0.6.4

% cat example.py
import pytest


@pytest.fixture()
def parentheses(): ...


@pytest.fixture
def no_parentheses(): ...

% ruff check --select PT001 --output-format concise example.py
example.py:4:1: PT001 [*] Use `@pytest.fixture` over `@pytest.fixture()`
Found 1 error.
[*] 1 fixable with the `--fix` option.

% echo '[lint.flake8-pytest-style]' > ruff.toml

% ruff check --select PT001 --output-format concise example.py
example.py:8:1: PT001 [*] Use `@pytest.fixture()` over `@pytest.fixture`
Found 1 error.
[*] 1 fixable with the `--fix` option.

Test Plan

Manual testing, see reproduction section.

% ./target/debug/ruff check --select PT001 --output-format concise example.py
warning: Detected debug build without --no-cache.
example.py:4:1: PT001 [*] Use `@pytest.fixture` over `@pytest.fixture()`
Found 1 error.
[*] 1 fixable with the `--fix` option.

% echo '[lint.flake8-pytest-style]' > ruff.toml

% ./target/debug/ruff check --select PT001 --output-format concise example.py
warning: Detected debug build without --no-cache.
example.py:4:1: PT001 [*] Use `@pytest.fixture` over `@pytest.fixture()`
Found 1 error.
[*] 1 fixable with the `--fix` option.

Given the fact that this was the only reference to ruff_linter::settings::types::PreviewMode in crates/ruff_workspace/src/options.rs, looks like no other settings depend on the preview mode, and it doesn't make much sense to me to write any additional tests that verify there's no interaction between preview mode and other default values.

[github-actions]

ruff-ecosystem results

Linter (stable)

✅ ecosystem check detected no linter changes.

Linter (preview)

✅ ecosystem check detected no linter changes.

[AlexWaygood]

LGTM! Sorry we didn't catch this, that's on us :-(

Unfortunately, however, this is will be a breaking change for some users, so we'll have to merge this as part of the 0.7 release. That should come at some point in the next few weeks, though; shouldn't be too long to wait :)