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# Licensed under the LGPL: https://www.gnu.org/licenses/old-licenses/lgpl-2.1.en.html
# For details: https://github.com/PyCQA/astroid/blob/main/LICENSE
# Copyright (c) https://github.com/PyCQA/astroid/blob/main/CONTRIBUTORS.txt
"""Hooks for nose library."""
import re
import textwrap
import astroid.builder
from astroid.brain.helpers import register_module_extender
from astroid.exceptions import InferenceError
from astroid.manager import AstroidManager
_BUILDER = astroid.builder.AstroidBuilder(AstroidManager())
CAPITALS = re.compile("([A-Z])")
def _pep8(name, caps=CAPITALS):
return caps.sub(lambda m: "_" + m.groups()[0].lower(), name)
def _nose_tools_functions():
"""Get an iterator of names and bound methods."""
module = _BUILDER.string_build(
textwrap.dedent(
"""
import unittest
class Test(unittest.TestCase):
pass
a = Test()
"""
)
)
try:
case = next(module["a"].infer())
except (InferenceError, StopIteration):
return
for method in case.methods():
if method.name.startswith("assert") and "_" not in method.name:
pep8_name = _pep8(method.name)
yield pep8_name, astroid.BoundMethod(method, case)
if method.name == "assertEqual":
# nose also exports assert_equals.
yield "assert_equals", astroid.BoundMethod(method, case)
def _nose_tools_transform(node):
for method_name, method in _nose_tools_functions():
node.locals[method_name] = [method]
def _nose_tools_trivial_transform():
"""Custom transform for the nose.tools module."""
stub = _BUILDER.string_build("""__all__ = []""")
all_entries = ["ok_", "eq_"]
for pep8_name, method in _nose_tools_functions():
all_entries.append(pep8_name)
stub[pep8_name] = method
# Update the __all__ variable, since nose.tools
# does this manually with .append.
all_assign = stub["__all__"].parent
all_object = astroid.List(all_entries)
all_object.parent = all_assign
all_assign.value = all_object
return stub
register_module_extender(
AstroidManager(), "nose.tools.trivial", _nose_tools_trivial_transform
)
AstroidManager().register_transform(
astroid.Module, _nose_tools_transform, lambda n: n.name == "nose.tools"
)
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