576 lines
22 KiB
Python
576 lines
22 KiB
Python
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"""Mimic doctest in Sphinx.
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The extension automatically execute code snippets and checks their results.
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"""
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from __future__ import annotations
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import doctest
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import re
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import sys
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import time
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from io import StringIO
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from os import path
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from typing import TYPE_CHECKING, Any, Callable
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from docutils import nodes
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from docutils.parsers.rst import directives
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from packaging.specifiers import InvalidSpecifier, SpecifierSet
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from packaging.version import Version
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import sphinx
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from sphinx.builders import Builder
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from sphinx.locale import __
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from sphinx.util import logging
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from sphinx.util.console import bold # type: ignore[attr-defined]
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from sphinx.util.docutils import SphinxDirective
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from sphinx.util.osutil import relpath
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if TYPE_CHECKING:
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from collections.abc import Iterable, Sequence
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from docutils.nodes import Element, Node, TextElement
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from sphinx.application import Sphinx
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from sphinx.util.typing import OptionSpec
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logger = logging.getLogger(__name__)
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blankline_re = re.compile(r'^\s*<BLANKLINE>', re.MULTILINE)
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doctestopt_re = re.compile(r'#\s*doctest:.+$', re.MULTILINE)
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def is_allowed_version(spec: str, version: str) -> bool:
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"""Check `spec` satisfies `version` or not.
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This obeys PEP-440 specifiers:
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https://peps.python.org/pep-0440/#version-specifiers
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Some examples:
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>>> is_allowed_version('<=3.5', '3.3')
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True
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>>> is_allowed_version('<=3.2', '3.3')
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False
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>>> is_allowed_version('>3.2, <4.0', '3.3')
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True
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"""
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return Version(version) in SpecifierSet(spec)
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# set up the necessary directives
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class TestDirective(SphinxDirective):
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"""
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Base class for doctest-related directives.
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"""
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has_content = True
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required_arguments = 0
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optional_arguments = 1
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final_argument_whitespace = True
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def run(self) -> list[Node]:
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# use ordinary docutils nodes for test code: they get special attributes
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# so that our builder recognizes them, and the other builders are happy.
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code = '\n'.join(self.content)
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test = None
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if self.name == 'doctest':
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if '<BLANKLINE>' in code:
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# convert <BLANKLINE>s to ordinary blank lines for presentation
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test = code
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code = blankline_re.sub('', code)
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if doctestopt_re.search(code) and 'no-trim-doctest-flags' not in self.options:
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if not test:
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test = code
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code = doctestopt_re.sub('', code)
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nodetype: type[TextElement] = nodes.literal_block
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if self.name in ('testsetup', 'testcleanup') or 'hide' in self.options:
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nodetype = nodes.comment
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if self.arguments:
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groups = [x.strip() for x in self.arguments[0].split(',')]
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else:
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groups = ['default']
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node = nodetype(code, code, testnodetype=self.name, groups=groups)
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self.set_source_info(node)
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if test is not None:
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# only save if it differs from code
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node['test'] = test
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if self.name == 'doctest':
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node['language'] = 'pycon'
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elif self.name == 'testcode':
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node['language'] = 'python'
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elif self.name == 'testoutput':
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# don't try to highlight output
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node['language'] = 'none'
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node['options'] = {}
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if self.name in ('doctest', 'testoutput') and 'options' in self.options:
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# parse doctest-like output comparison flags
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option_strings = self.options['options'].replace(',', ' ').split()
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for option in option_strings:
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prefix, option_name = option[0], option[1:]
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if prefix not in '+-':
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self.state.document.reporter.warning(
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__("missing '+' or '-' in '%s' option.") % option,
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line=self.lineno)
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continue
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if option_name not in doctest.OPTIONFLAGS_BY_NAME:
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self.state.document.reporter.warning(
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__("'%s' is not a valid option.") % option_name,
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line=self.lineno)
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continue
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flag = doctest.OPTIONFLAGS_BY_NAME[option[1:]]
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node['options'][flag] = (option[0] == '+')
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if self.name == 'doctest' and 'pyversion' in self.options:
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try:
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spec = self.options['pyversion']
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python_version = '.'.join([str(v) for v in sys.version_info[:3]])
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if not is_allowed_version(spec, python_version):
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flag = doctest.OPTIONFLAGS_BY_NAME['SKIP']
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node['options'][flag] = True # Skip the test
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except InvalidSpecifier:
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self.state.document.reporter.warning(
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__("'%s' is not a valid pyversion option") % spec,
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line=self.lineno)
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if 'skipif' in self.options:
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node['skipif'] = self.options['skipif']
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if 'trim-doctest-flags' in self.options:
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node['trim_flags'] = True
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elif 'no-trim-doctest-flags' in self.options:
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node['trim_flags'] = False
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return [node]
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class TestsetupDirective(TestDirective):
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option_spec: OptionSpec = {
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'skipif': directives.unchanged_required,
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}
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class TestcleanupDirective(TestDirective):
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option_spec: OptionSpec = {
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'skipif': directives.unchanged_required,
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}
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class DoctestDirective(TestDirective):
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option_spec: OptionSpec = {
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'hide': directives.flag,
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'no-trim-doctest-flags': directives.flag,
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'options': directives.unchanged,
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'pyversion': directives.unchanged_required,
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'skipif': directives.unchanged_required,
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'trim-doctest-flags': directives.flag,
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}
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class TestcodeDirective(TestDirective):
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option_spec: OptionSpec = {
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'hide': directives.flag,
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'no-trim-doctest-flags': directives.flag,
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'pyversion': directives.unchanged_required,
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'skipif': directives.unchanged_required,
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'trim-doctest-flags': directives.flag,
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}
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class TestoutputDirective(TestDirective):
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option_spec: OptionSpec = {
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'hide': directives.flag,
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'no-trim-doctest-flags': directives.flag,
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'options': directives.unchanged,
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'pyversion': directives.unchanged_required,
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'skipif': directives.unchanged_required,
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'trim-doctest-flags': directives.flag,
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}
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parser = doctest.DocTestParser()
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# helper classes
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class TestGroup:
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def __init__(self, name: str) -> None:
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self.name = name
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self.setup: list[TestCode] = []
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self.tests: list[list[TestCode] | tuple[TestCode, None]] = []
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self.cleanup: list[TestCode] = []
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def add_code(self, code: TestCode, prepend: bool = False) -> None:
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if code.type == 'testsetup':
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if prepend:
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self.setup.insert(0, code)
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else:
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self.setup.append(code)
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elif code.type == 'testcleanup':
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self.cleanup.append(code)
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elif code.type == 'doctest':
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self.tests.append([code])
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elif code.type == 'testcode':
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# "testoutput" may replace the second element
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self.tests.append((code, None))
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elif code.type == 'testoutput':
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if self.tests:
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latest_test = self.tests[-1]
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if len(latest_test) == 2:
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self.tests[-1] = [latest_test[0], code]
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else:
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raise RuntimeError(__('invalid TestCode type'))
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def __repr__(self) -> str:
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return (f'TestGroup(name={self.name!r}, setup={self.setup!r}, '
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f'cleanup={self.cleanup!r}, tests={self.tests!r})')
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class TestCode:
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def __init__(self, code: str, type: str, filename: str,
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lineno: int, options: dict | None = None) -> None:
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self.code = code
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self.type = type
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self.filename = filename
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self.lineno = lineno
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self.options = options or {}
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def __repr__(self) -> str:
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return (f'TestCode({self.code!r}, {self.type!r}, filename={self.filename!r}, '
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f'lineno={self.lineno!r}, options={self.options!r})')
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class SphinxDocTestRunner(doctest.DocTestRunner):
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def summarize(self, out: Callable, verbose: bool | None = None, # type: ignore[override]
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) -> tuple[int, int]:
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string_io = StringIO()
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old_stdout = sys.stdout
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sys.stdout = string_io
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try:
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res = super().summarize(verbose)
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finally:
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sys.stdout = old_stdout
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out(string_io.getvalue())
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return res
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def _DocTestRunner__patched_linecache_getlines(self, filename: str,
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module_globals: Any = None) -> Any:
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# this is overridden from DocTestRunner adding the try-except below
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m = self._DocTestRunner__LINECACHE_FILENAME_RE.match( # type: ignore[attr-defined]
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filename)
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if m and m.group('name') == self.test.name:
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try:
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example = self.test.examples[int(m.group('examplenum'))]
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# because we compile multiple doctest blocks with the same name
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# (viz. the group name) this might, for outer stack frames in a
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# traceback, get the wrong test which might not have enough examples
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except IndexError:
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pass
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else:
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return example.source.splitlines(True)
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return self.save_linecache_getlines( # type: ignore[attr-defined]
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filename, module_globals)
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# the new builder -- use sphinx-build.py -b doctest to run
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class DocTestBuilder(Builder):
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"""
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Runs test snippets in the documentation.
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"""
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name = 'doctest'
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epilog = __('Testing of doctests in the sources finished, look at the '
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'results in %(outdir)s/output.txt.')
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def init(self) -> None:
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# default options
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self.opt = self.config.doctest_default_flags
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# HACK HACK HACK
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# doctest compiles its snippets with type 'single'. That is nice
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# for doctest examples but unusable for multi-statement code such
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# as setup code -- to be able to use doctest error reporting with
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# that code nevertheless, we monkey-patch the "compile" it uses.
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doctest.compile = self.compile # type: ignore[attr-defined]
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sys.path[0:0] = self.config.doctest_path
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self.type = 'single'
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self.total_failures = 0
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self.total_tries = 0
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self.setup_failures = 0
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self.setup_tries = 0
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self.cleanup_failures = 0
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self.cleanup_tries = 0
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date = time.strftime('%Y-%m-%d %H:%M:%S')
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outpath = self.outdir.joinpath('output.txt')
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self.outfile = outpath.open('w', encoding='utf-8') # NoQA: SIM115
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self.outfile.write(('Results of doctest builder run on %s\n'
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'==================================%s\n') %
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(date, '=' * len(date)))
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def _out(self, text: str) -> None:
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logger.info(text, nonl=True)
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self.outfile.write(text)
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def _warn_out(self, text: str) -> None:
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if self.app.quiet or self.app.warningiserror:
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logger.warning(text)
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else:
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logger.info(text, nonl=True)
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self.outfile.write(text)
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def get_target_uri(self, docname: str, typ: str | None = None) -> str:
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return ''
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def get_outdated_docs(self) -> set[str]:
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return self.env.found_docs
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def finish(self) -> None:
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# write executive summary
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def s(v: int) -> str:
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return 's' if v != 1 else ''
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repl = (self.total_tries, s(self.total_tries),
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self.total_failures, s(self.total_failures),
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self.setup_failures, s(self.setup_failures),
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self.cleanup_failures, s(self.cleanup_failures))
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self._out('''
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Doctest summary
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===============
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%5d test%s
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%5d failure%s in tests
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%5d failure%s in setup code
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%5d failure%s in cleanup code
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''' % repl)
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self.outfile.close()
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if self.total_failures or self.setup_failures or self.cleanup_failures:
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self.app.statuscode = 1
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def write(self, build_docnames: Iterable[str] | None, updated_docnames: Sequence[str],
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method: str = 'update') -> None:
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if build_docnames is None:
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build_docnames = sorted(self.env.all_docs)
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logger.info(bold('running tests...'))
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for docname in build_docnames:
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# no need to resolve the doctree
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doctree = self.env.get_doctree(docname)
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self.test_doc(docname, doctree)
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def get_filename_for_node(self, node: Node, docname: str) -> str:
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"""Try to get the file which actually contains the doctest, not the
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filename of the document it's included in."""
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try:
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filename = relpath(node.source, self.env.srcdir)\
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.rsplit(':docstring of ', maxsplit=1)[0]
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except Exception:
|
||
|
|
filename = self.env.doc2path(docname, False)
|
||
|
|
return filename
|
||
|
|
|
||
|
|
@staticmethod
|
||
|
|
def get_line_number(node: Node) -> int:
|
||
|
|
"""Get the real line number or admit we don't know."""
|
||
|
|
# TODO: Work out how to store or calculate real (file-relative)
|
||
|
|
# line numbers for doctest blocks in docstrings.
|
||
|
|
if ':docstring of ' in path.basename(node.source or ''):
|
||
|
|
# The line number is given relative to the stripped docstring,
|
||
|
|
# not the file. This is correct where it is set, in
|
||
|
|
# `docutils.nodes.Node.setup_child`, but Sphinx should report
|
||
|
|
# relative to the file, not the docstring.
|
||
|
|
return None # type: ignore[return-value]
|
||
|
|
if node.line is not None:
|
||
|
|
# TODO: find the root cause of this off by one error.
|
||
|
|
return node.line - 1
|
||
|
|
return None
|
||
|
|
|
||
|
|
def skipped(self, node: Element) -> bool:
|
||
|
|
if 'skipif' not in node:
|
||
|
|
return False
|
||
|
|
else:
|
||
|
|
condition = node['skipif']
|
||
|
|
context: dict[str, Any] = {}
|
||
|
|
if self.config.doctest_global_setup:
|
||
|
|
exec(self.config.doctest_global_setup, context) # NoQA: S102
|
||
|
|
should_skip = eval(condition, context) # NoQA: PGH001
|
||
|
|
if self.config.doctest_global_cleanup:
|
||
|
|
exec(self.config.doctest_global_cleanup, context) # NoQA: S102
|
||
|
|
return should_skip
|
||
|
|
|
||
|
|
def test_doc(self, docname: str, doctree: Node) -> None:
|
||
|
|
groups: dict[str, TestGroup] = {}
|
||
|
|
add_to_all_groups = []
|
||
|
|
self.setup_runner = SphinxDocTestRunner(verbose=False,
|
||
|
|
optionflags=self.opt)
|
||
|
|
self.test_runner = SphinxDocTestRunner(verbose=False,
|
||
|
|
optionflags=self.opt)
|
||
|
|
self.cleanup_runner = SphinxDocTestRunner(verbose=False,
|
||
|
|
optionflags=self.opt)
|
||
|
|
|
||
|
|
self.test_runner._fakeout = self.setup_runner._fakeout # type: ignore[attr-defined]
|
||
|
|
self.cleanup_runner._fakeout = self.setup_runner._fakeout # type: ignore[attr-defined]
|
||
|
|
|
||
|
|
if self.config.doctest_test_doctest_blocks:
|
||
|
|
def condition(node: Node) -> bool:
|
||
|
|
return (isinstance(node, (nodes.literal_block, nodes.comment)) and
|
||
|
|
'testnodetype' in node) or \
|
||
|
|
isinstance(node, nodes.doctest_block)
|
||
|
|
else:
|
||
|
|
def condition(node: Node) -> bool:
|
||
|
|
return isinstance(node, (nodes.literal_block, nodes.comment)) \
|
||
|
|
and 'testnodetype' in node
|
||
|
|
for node in doctree.findall(condition): # type: Element
|
||
|
|
if self.skipped(node):
|
||
|
|
continue
|
||
|
|
|
||
|
|
source = node['test'] if 'test' in node else node.astext()
|
||
|
|
filename = self.get_filename_for_node(node, docname)
|
||
|
|
line_number = self.get_line_number(node)
|
||
|
|
if not source:
|
||
|
|
logger.warning(__('no code/output in %s block at %s:%s'),
|
||
|
|
node.get('testnodetype', 'doctest'),
|
||
|
|
filename, line_number)
|
||
|
|
code = TestCode(source, type=node.get('testnodetype', 'doctest'),
|
||
|
|
filename=filename, lineno=line_number,
|
||
|
|
options=node.get('options'))
|
||
|
|
node_groups = node.get('groups', ['default'])
|
||
|
|
if '*' in node_groups:
|
||
|
|
add_to_all_groups.append(code)
|
||
|
|
continue
|
||
|
|
for groupname in node_groups:
|
||
|
|
if groupname not in groups:
|
||
|
|
groups[groupname] = TestGroup(groupname)
|
||
|
|
groups[groupname].add_code(code)
|
||
|
|
for code in add_to_all_groups:
|
||
|
|
for group in groups.values():
|
||
|
|
group.add_code(code)
|
||
|
|
if self.config.doctest_global_setup:
|
||
|
|
code = TestCode(self.config.doctest_global_setup,
|
||
|
|
'testsetup', filename='<global_setup>', lineno=0)
|
||
|
|
for group in groups.values():
|
||
|
|
group.add_code(code, prepend=True)
|
||
|
|
if self.config.doctest_global_cleanup:
|
||
|
|
code = TestCode(self.config.doctest_global_cleanup,
|
||
|
|
'testcleanup', filename='<global_cleanup>', lineno=0)
|
||
|
|
for group in groups.values():
|
||
|
|
group.add_code(code)
|
||
|
|
if not groups:
|
||
|
|
return
|
||
|
|
|
||
|
|
show_successes = self.config.doctest_show_successes
|
||
|
|
if show_successes:
|
||
|
|
self._out('\n'
|
||
|
|
f'Document: {docname}\n'
|
||
|
|
f'----------{"-" * len(docname)}\n')
|
||
|
|
for group in groups.values():
|
||
|
|
self.test_group(group)
|
||
|
|
# Separately count results from setup code
|
||
|
|
res_f, res_t = self.setup_runner.summarize(self._out, verbose=False)
|
||
|
|
self.setup_failures += res_f
|
||
|
|
self.setup_tries += res_t
|
||
|
|
if self.test_runner.tries:
|
||
|
|
res_f, res_t = self.test_runner.summarize(
|
||
|
|
self._out, verbose=show_successes)
|
||
|
|
self.total_failures += res_f
|
||
|
|
self.total_tries += res_t
|
||
|
|
if self.cleanup_runner.tries:
|
||
|
|
res_f, res_t = self.cleanup_runner.summarize(
|
||
|
|
self._out, verbose=show_successes)
|
||
|
|
self.cleanup_failures += res_f
|
||
|
|
self.cleanup_tries += res_t
|
||
|
|
|
||
|
|
def compile(self, code: str, name: str, type: str, flags: Any, dont_inherit: bool) -> Any:
|
||
|
|
return compile(code, name, self.type, flags, dont_inherit)
|
||
|
|
|
||
|
|
def test_group(self, group: TestGroup) -> None:
|
||
|
|
ns: dict = {}
|
||
|
|
|
||
|
|
def run_setup_cleanup(runner: Any, testcodes: list[TestCode], what: Any) -> bool:
|
||
|
|
examples = []
|
||
|
|
for testcode in testcodes:
|
||
|
|
example = doctest.Example(testcode.code, '', lineno=testcode.lineno)
|
||
|
|
examples.append(example)
|
||
|
|
if not examples:
|
||
|
|
return True
|
||
|
|
# simulate a doctest with the code
|
||
|
|
sim_doctest = doctest.DocTest(examples, {},
|
||
|
|
f'{group.name} ({what} code)',
|
||
|
|
testcodes[0].filename, 0, None)
|
||
|
|
sim_doctest.globs = ns
|
||
|
|
old_f = runner.failures
|
||
|
|
self.type = 'exec' # the snippet may contain multiple statements
|
||
|
|
runner.run(sim_doctest, out=self._warn_out, clear_globs=False)
|
||
|
|
if runner.failures > old_f:
|
||
|
|
return False
|
||
|
|
return True
|
||
|
|
|
||
|
|
# run the setup code
|
||
|
|
if not run_setup_cleanup(self.setup_runner, group.setup, 'setup'):
|
||
|
|
# if setup failed, don't run the group
|
||
|
|
return
|
||
|
|
|
||
|
|
# run the tests
|
||
|
|
for code in group.tests:
|
||
|
|
if len(code) == 1:
|
||
|
|
# ordinary doctests (code/output interleaved)
|
||
|
|
try:
|
||
|
|
test = parser.get_doctest(code[0].code, {}, group.name,
|
||
|
|
code[0].filename, code[0].lineno)
|
||
|
|
except Exception:
|
||
|
|
logger.warning(__('ignoring invalid doctest code: %r'), code[0].code,
|
||
|
|
location=(code[0].filename, code[0].lineno))
|
||
|
|
continue
|
||
|
|
if not test.examples:
|
||
|
|
continue
|
||
|
|
for example in test.examples:
|
||
|
|
# apply directive's comparison options
|
||
|
|
new_opt = code[0].options.copy()
|
||
|
|
new_opt.update(example.options)
|
||
|
|
example.options = new_opt
|
||
|
|
self.type = 'single' # as for ordinary doctests
|
||
|
|
else:
|
||
|
|
# testcode and output separate
|
||
|
|
output = code[1].code if code[1] else ''
|
||
|
|
options = code[1].options if code[1] else {}
|
||
|
|
# disable <BLANKLINE> processing as it is not needed
|
||
|
|
options[doctest.DONT_ACCEPT_BLANKLINE] = True
|
||
|
|
# find out if we're testing an exception
|
||
|
|
m = parser._EXCEPTION_RE.match(output) # type: ignore[attr-defined]
|
||
|
|
if m:
|
||
|
|
exc_msg = m.group('msg')
|
||
|
|
else:
|
||
|
|
exc_msg = None
|
||
|
|
example = doctest.Example(code[0].code, output, exc_msg=exc_msg,
|
||
|
|
lineno=code[0].lineno, options=options)
|
||
|
|
test = doctest.DocTest([example], {}, group.name,
|
||
|
|
code[0].filename, code[0].lineno, None)
|
||
|
|
self.type = 'exec' # multiple statements again
|
||
|
|
# DocTest.__init__ copies the globs namespace, which we don't want
|
||
|
|
test.globs = ns
|
||
|
|
# also don't clear the globs namespace after running the doctest
|
||
|
|
self.test_runner.run(test, out=self._warn_out, clear_globs=False)
|
||
|
|
|
||
|
|
# run the cleanup
|
||
|
|
run_setup_cleanup(self.cleanup_runner, group.cleanup, 'cleanup')
|
||
|
|
|
||
|
|
|
||
|
|
def setup(app: Sphinx) -> dict[str, Any]:
|
||
|
|
app.add_directive('testsetup', TestsetupDirective)
|
||
|
|
app.add_directive('testcleanup', TestcleanupDirective)
|
||
|
|
app.add_directive('doctest', DoctestDirective)
|
||
|
|
app.add_directive('testcode', TestcodeDirective)
|
||
|
|
app.add_directive('testoutput', TestoutputDirective)
|
||
|
|
app.add_builder(DocTestBuilder)
|
||
|
|
# this config value adds to sys.path
|
||
|
|
app.add_config_value('doctest_show_successes', True, False, (bool,))
|
||
|
|
app.add_config_value('doctest_path', [], False)
|
||
|
|
app.add_config_value('doctest_test_doctest_blocks', 'default', False)
|
||
|
|
app.add_config_value('doctest_global_setup', '', False)
|
||
|
|
app.add_config_value('doctest_global_cleanup', '', False)
|
||
|
|
app.add_config_value(
|
||
|
|
'doctest_default_flags',
|
||
|
|
doctest.DONT_ACCEPT_TRUE_FOR_1 | doctest.ELLIPSIS | doctest.IGNORE_EXCEPTION_DETAIL,
|
||
|
|
False)
|
||
|
|
return {'version': sphinx.__display_version__, 'parallel_read_safe': True}
|