sybil-extras 2024.10.18

Additions to Sybil, the documentation testing tool.

sybil-extras

Add ons for Sybil.

Installation

$ pip install sybil-extras

Usage

MultiEvaluator

"""Use MultiEvaluator to run multiple evaluators on the same parser."""

from sybil import Example, Sybil
from sybil.evaluators.python import PythonEvaluator
from sybil.parsers.rest.codeblock import CodeBlockParser
from sybil.typing import Evaluator

from sybil_extras.evaluators.multi import MultiEvaluator


def _evaluator_1(example: Example) -> None:
    """Check that the example is long enough."""
    minimum_length = 50
    assert len(example.parsed) >= minimum_length


evaluators: list[Evaluator] = [_evaluator_1, PythonEvaluator()]
multi_evaluator = MultiEvaluator(evaluators=evaluators)
parser = CodeBlockParser(language="python", evaluator=multi_evaluator)
sybil = Sybil(parsers=[parser])

pytest_collect_file = sybil.pytest()

ShellCommandEvaluator

"""Use ShellCommandEvaluator to run shell commands against the code block."""

import sys

from sybil import Sybil
from sybil.parsers.rest.codeblock import CodeBlockParser

from sybil_extras.evaluators.shell_evaluator import ShellCommandEvaluator

evaluator = ShellCommandEvaluator(
    args=[sys.executable, "-m", "mypy"],
    # The code block is written to a temporary file
    # with these suffixes.
    tempfile_suffixes=[".example", ".py"],
    # Pad the temporary file with newlines so that the
    # line numbers in the error messages match the
    # line numbers in the source document.
    pad_file=True,
    # Don't write any changes back to the source document.
    # This option is useful when running a linter or formatter
    # which modifies the code.
    write_to_file=False,
    # Use a pseudo-terminal for running commands.
    # This can be useful e.g. to get color output, but can also break
    # in some environments.
    use_pty=True,
)
parser = CodeBlockParser(language="python", evaluator=evaluator)
sybil = Sybil(parsers=[parser])

pytest_collect_file = sybil.pytest()

CustomDirectiveSkipParser

"""Use CustomDirectiveSkipParser to skip code blocks with a custom marker."""

from sybil import Sybil
from sybil.parsers.rest.codeblock import PythonCodeBlockParser

# Similar parsers are available at
# sybil_extras.parsers.markdown.custom_directive_skip and
# sybil_extras.parsers.myst.custom_directive_skip.
from sybil_extras.parsers.rest.custom_directive_skip import (
    CustomDirectiveSkipParser,
)

skip_parser = CustomDirectiveSkipParser(directive="custom-marker-skip")
code_block_parser = PythonCodeBlockParser()

sybil = Sybil(parsers=[skip_parser, code_block_parser])

pytest_collect_file = sybil.pytest()

This allows you to skip code blocks in the same way as described in the Sybil documentation for skipping examples in reStructuredText, Markdown , and MyST files, but with custom text, e.g. custom-marker-skip replacing the word skip.