Merge pull request #758 from kieran-ryan/ruff-migration

Migrate `black`, `flake8`, `isort`, `pyupgrade` linters and formatters to `ruff`

Author: youtux

.pre-commit-config.yaml

@@ -1,33 +1,16 @@
 # See https://pre-commit.com for more information
 # See https://pre-commit.com/hooks.html for more hooks
 repos:
--   repo: https://github.com/psf/black
-    # If you update the version here, also update it in tox.ini (py*-pytestlatest-linters)
-    rev: 24.10.0
+  - repo: https://github.com/pre-commit/pre-commit-hooks
+    rev: cef0300fd0fc4d2a87a85fa2093c6b283ea36f4b  # frozen: v5.0.0
     hooks:
-    - id: black
--   repo: https://github.com/pycqa/isort
-    rev: 5.13.2
+      - id: trailing-whitespace
+      - id: end-of-file-fixer
+      - id: check-yaml
+      - id: check-added-large-files
+  - repo: https://github.com/astral-sh/ruff-pre-commit
+    rev: f0b5944bef86f50d875305821a0ab0d8c601e465  # frozen: v0.8.4
     hooks:
-      - id: isort
-        name: isort (python)
--   repo: https://github.com/pre-commit/pre-commit-hooks
-    rev: v5.0.0
-    hooks:
-    -   id: trailing-whitespace
-    -   id: end-of-file-fixer
-    -   id: check-yaml
-    -   id: check-added-large-files
--   repo: https://github.com/asottile/pyupgrade
-    rev: v3.19.0
-    hooks:
-    -   id: pyupgrade
-        args: ["--py39-plus"]
--   repo: https://github.com/pycqa/flake8
-    rev: "7.1.1"
-    hooks:
-    -   id: flake8
-        additional_dependencies: [
-          "flake8-pyproject",
-          "flake8-bugbear",
-        ]
+      - id: ruff
+        args: [ --fix ]
+      - id: ruff-format

.vscode/extensions.json

@@ -0,0 +1,5 @@
+{
+    "recommendations": [
+        "charliermarsh.ruff"
+    ]
+}

docs/conf.py

@@ -5,6 +5,7 @@
 
 # -- Project information -----------------------------------------------------
 # https://www.sphinx-doc.org/en/master/usage/configuration.html#project-information
+from __future__ import annotations
 
 from importlib import metadata as _metadata
 

pyproject.toml

@@ -57,21 +57,29 @@ sphinx-autobuild = "*"
 requires = ["poetry-core>=1.0.0"]
 build-backend = "poetry.core.masonry.api"
 
-[tool.black]
+[tool.ruff]
 line-length = 120
-target-version = ["py39", "py310", "py311", "py312", "py313"]
-
-[tool.flake8]
-# E1: indentation: already covered by `black`
-# E2: whitespace: already covered by `black`
-# E3: blank line: already covered by `black`
-# E501: line length: already covered by `black`
-extend-ignore = "E1,E2,E3,E501"
-
-[tool.isort]
-profile = "black"
-line_length = 120
-multi_line_output = 3
+target-version = "py39"
+lint.select = [
+    "B",     # flake8-bugbear
+    "BLE",   # flake8-blind-except
+    "C4",    # flake8-comprehensions
+    "E4",    # pycodestyle - error - import
+    "E7",    # pycodestyle - error - statement
+    "E9",    # pycodestyle - error - runtime
+    "F",     # pyflakes
+    "I",     # isort
+    "ISC",   # flake8-implicit-str-concat
+    "PERF",  # perflint
+    "UP",    # pyupgrade
+]
+lint.ignore = [
+    # Covered by formatter
+    "ISC001" # single-line-implicit-string-concatenation
+]
+lint.isort.required-imports = [
+    "from __future__ import annotations",
+]
 
 [tool.coverage.report]
 exclude_lines = [

src/pytest_bdd/gherkin_terminal_reporter.py

@@ -31,10 +31,9 @@ def configure(config: Config) -> None:
             raise Exception(
                 "gherkin-terminal-reporter is not compatible with any other terminal reporter."
                 "You can use only one terminal reporter."
-                "Currently '{0}' is used."
-                "Please decide to use one by deactivating {0} or gherkin-terminal-reporter.".format(
-                    current_reporter.__class__
-                )
+                f"Currently '{current_reporter.__class__}' is used."
+                f"Please decide to use one by deactivating {current_reporter.__class__} "
+                "or gherkin-terminal-reporter."
             )
         gherkin_reporter = GherkinTerminalReporter(config)
         config.pluginmanager.unregister(current_reporter)

src/pytest_bdd/parser.py

@@ -10,14 +10,12 @@
 
 from .exceptions import StepError
 from .gherkin_parser import Background as GherkinBackground
-from .gherkin_parser import DataTable
+from .gherkin_parser import DataTable, GherkinDocument, get_gherkin_document
 from .gherkin_parser import Feature as GherkinFeature
-from .gherkin_parser import GherkinDocument
 from .gherkin_parser import Rule as GherkinRule
 from .gherkin_parser import Scenario as GherkinScenario
 from .gherkin_parser import Step as GherkinStep
 from .gherkin_parser import Tag as GherkinTag
-from .gherkin_parser import get_gherkin_document
 from .types import STEP_TYPE_BY_PARSER_KEYWORD
 
 PARAM_RE = re.compile(r"<(.+?)>")
@@ -48,7 +46,7 @@ def get_tag_names(tag_data: list[GherkinTag]) -> set[str]:
     """Extract tag names from tag data.
 
     Args:
-        tag_data (List[dict]): The tag data to extract names from.
+        tag_data (list[dict]): The tag data to extract names from.
 
     Returns:
         set[str]: A set of tag names.
@@ -66,7 +64,7 @@ class Feature:
         rel_filename (str): The relative path of the feature file.
         name (str): The name of the feature.
         tags (set[str]): A set of tags associated with the feature.
-        background (Optional[Background]): The background steps for the feature, if any.
+        background (Background | None): The background steps for the feature, if any.
         line_number (int): The line number where the feature starts in the file.
         description (str): The description of the feature.
     """
@@ -88,10 +86,10 @@ class Examples:
     """Represents examples used in scenarios for parameterization.
 
     Attributes:
-        line_number (Optional[int]): The line number where the examples start.
-        name (Optional[str]): The name of the examples.
-        example_params (List[str]): The names of the parameters for the examples.
-        examples (List[Sequence[str]]): The list of example rows.
+        line_number (int | None): The line number where the examples start.
+        name (str | None): The name of the examples.
+        example_params (list[str]): The names of the parameters for the examples.
+        examples (list[Sequence[str]]): The list of example rows.
     """
 
     line_number: int | None = None
@@ -154,11 +152,11 @@ class ScenarioTemplate:
         name (str): The name of the scenario.
         line_number (int): The line number where the scenario starts in the file.
         templated (bool): Whether the scenario is templated.
-        description (Optional[str]): The description of the scenario.
+        description (str | None): The description of the scenario.
         tags (set[str]): A set of tags associated with the scenario.
-        _steps (List[Step]): The list of steps in the scenario (internal use only).
-        examples (Optional[Examples]): The examples used for parameterization in the scenario.
-        rule (Optional[Rule]): The rule to which the scenario may belong (None = no rule).
+        _steps (list[Step]): The list of steps in the scenario (internal use only).
+        examples (Examples | None): The examples used for parameterization in the scenario.
+        rule (Rule | None): The rule to which the scenario may belong (None = no rule).
     """
 
     feature: Feature
@@ -197,7 +195,7 @@ def steps(self) -> list[Step]:
         """Get all steps for the scenario, including background steps.
 
         Returns:
-            List[Step]: A list of steps, including any background steps from the feature.
+            list[Step]: A list of steps, including any background steps from the feature.
         """
         return self.all_background_steps + self._steps
 
@@ -244,8 +242,8 @@ class Scenario:
         keyword (str): The keyword used to define the scenario.
         name (str): The name of the scenario.
         line_number (int): The line number where the scenario starts in the file.
-        steps (List[Step]): The list of steps in the scenario.
-        description (Optional[str]): The description of the scenario.
+        steps (list[Step]): The list of steps in the scenario.
+        description (str | None): The description of the scenario.
         tags (set[str]): A set of tags associated with the scenario.
     """
 
@@ -270,8 +268,8 @@ class Step:
         indent (int): The indentation level of the step.
         keyword (str): The keyword used for the step (e.g., 'Given', 'When', 'Then').
         failed (bool): Whether the step has failed (internal use only).
-        scenario (Optional[ScenarioTemplate]): The scenario to which this step belongs (internal use only).
-        background (Optional[Background]): The background to which this step belongs (internal use only).
+        scenario (ScenarioTemplate | None): The scenario to which this step belongs (internal use only).
+        background (Background | None): The background to which this step belongs (internal use only).
     """
 
     type: str
@@ -346,7 +344,7 @@ class Background:
 
     Attributes:
         line_number (int): The line number where the background starts in the file.
-        steps (List[Step]): The list of steps in the background.
+        steps (list[Step]): The list of steps in the background.
     """
 
     line_number: int
@@ -371,7 +369,7 @@ class FeatureParser:
         encoding (str): File encoding of the feature file to parse.
     """
 
-    def __init__(self, basedir: str, filename: str, encoding: str = "utf-8"):
+    def __init__(self, basedir: str, filename: str, encoding: str = "utf-8") -> None:
         self.abs_filename = os.path.abspath(os.path.join(basedir, filename))
         self.rel_filename = os.path.join(os.path.basename(basedir), filename)
         self.encoding = encoding
@@ -380,10 +378,10 @@ def parse_steps(self, steps_data: list[GherkinStep]) -> list[Step]:
         """Parse a list of step data into Step objects.
 
         Args:
-            steps_data (List[dict]): The list of step data.
+            steps_data (list[dict]): The list of step data.
 
         Returns:
-            List[Step]: A list of Step objects.
+            list[Step]: A list of Step objects.
         """
 
         if not steps_data:
@@ -423,7 +421,7 @@ def parse_scenario(
         Args:
             scenario_data (dict): The dictionary containing scenario data.
             feature (Feature): The feature to which this scenario belongs.
-            rule (Optional[Rule]): The rule to which this scenario may belong. (None = no rule)
+            rule (Rule | None): The rule to which this scenario may belong. (None = no rule)
 
         Returns:
             ScenarioTemplate: A ScenarioTemplate object representing the parsed scenario.

src/pytest_bdd/scenario.py

@@ -188,9 +188,9 @@ def parse_step_arguments(step: Step, context: StepFunctionContext) -> dict[str,
     """Parse step arguments."""
     parsed_args = context.parser.parse_arguments(step.name)
 
-    assert parsed_args is not None, (
-        f"Unexpected `NoneType` returned from " f"parse_arguments(...) in parser: {context.parser!r}"
-    )
+    assert (
+        parsed_args is not None
+    ), f"Unexpected `NoneType` returned from parse_arguments(...) in parser: {context.parser!r}"
 
     reserved_args = set(parsed_args.keys()) & STEP_ARGUMENTS_RESERVED_NAMES
     if reserved_args:
@@ -386,7 +386,7 @@ def scenario(
         feature_name = feature.name or "[Empty]"
         raise exceptions.ScenarioNotFound(
             f'Scenario "{scenario_name}" in feature "{feature_name}" in {feature.filename} is not found.'
-        )
+        ) from None
 
     return _get_scenario_decorator(
         feature=feature, feature_name=feature_name, templated_scenario=scenario, scenario_name=scenario_name

tests/args/cfparse/test_args.py

@@ -1,5 +1,7 @@
 """Step arguments tests."""
 
+from __future__ import annotations
+
 import textwrap
 
 

tests/args/parse/test_args.py

@@ -1,5 +1,7 @@
 """Step arguments tests."""
 
+from __future__ import annotations
+
 import textwrap
 
 

tests/args/regex/test_args.py

@@ -1,5 +1,7 @@
 """Step arguments tests."""
 
+from __future__ import annotations
+
 import textwrap