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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
from __future__ import annotations
import unittest
import astroid
from astroid import nodes
try:
import attr as attr_module # pylint: disable=unused-import
HAS_ATTR = True
except ImportError:
HAS_ATTR = False
@unittest.skipUnless(HAS_ATTR, "These tests require the attr library")
class AttrsTest(unittest.TestCase):
def test_attr_transform(self) -> None:
module = astroid.parse(
"""
import attr
from attr import attrs, attrib, field
@attr.s
class Foo:
d = attr.ib(attr.Factory(dict))
f = Foo()
f.d['answer'] = 42
@attr.s(slots=True)
class Bar:
d = attr.ib(attr.Factory(dict))
g = Bar()
g.d['answer'] = 42
@attrs
class Bah:
d = attrib(attr.Factory(dict))
h = Bah()
h.d['answer'] = 42
@attr.attrs
class Bai:
d = attr.attrib(attr.Factory(dict))
i = Bai()
i.d['answer'] = 42
@attr.define
class Spam:
d = field(default=attr.Factory(dict))
j = Spam(d=1)
j.d['answer'] = 42
@attr.mutable
class Eggs:
d = attr.field(default=attr.Factory(dict))
k = Eggs(d=1)
k.d['answer'] = 42
@attr.frozen
class Eggs:
d = attr.field(default=attr.Factory(dict))
l = Eggs(d=1)
l.d['answer'] = 42
"""
)
for name in ("f", "g", "h", "i", "j", "k", "l"):
should_be_unknown = next(module.getattr(name)[0].infer()).getattr("d")[0]
self.assertIsInstance(should_be_unknown, astroid.Unknown)
def test_attrs_transform(self) -> None:
"""Test brain for decorators of the 'attrs' package.
Package added support for 'attrs' a long side 'attr' in v21.3.0.
See: https://github.com/python-attrs/attrs/releases/tag/21.3.0
"""
module = astroid.parse(
"""
import attrs
from attrs import field, mutable, frozen
@attrs.define
class Foo:
d = attrs.field(attrs.Factory(dict))
f = Foo()
f.d['answer'] = 42
@attrs.define(slots=True)
class Bar:
d = field(attrs.Factory(dict))
g = Bar()
g.d['answer'] = 42
@attrs.mutable
class Bah:
d = field(attrs.Factory(dict))
h = Bah()
h.d['answer'] = 42
@attrs.frozen
class Bai:
d = attrs.field(attrs.Factory(dict))
i = Bai()
i.d['answer'] = 42
@attrs.define
class Spam:
d = field(default=attrs.Factory(dict))
j = Spam(d=1)
j.d['answer'] = 42
@attrs.mutable
class Eggs:
d = attrs.field(default=attrs.Factory(dict))
k = Eggs(d=1)
k.d['answer'] = 42
@attrs.frozen
class Eggs:
d = attrs.field(default=attrs.Factory(dict))
l = Eggs(d=1)
l.d['answer'] = 42
"""
)
for name in ("f", "g", "h", "i", "j", "k", "l"):
should_be_unknown = next(module.getattr(name)[0].infer()).getattr("d")[0]
self.assertIsInstance(should_be_unknown, astroid.Unknown)
def test_special_attributes(self) -> None:
"""Make sure special attrs attributes exist"""
code = """
import attr
@attr.s
class Foo:
pass
Foo()
"""
foo_inst = next(astroid.extract_node(code).infer())
[attr_node] = foo_inst.getattr("__attrs_attrs__")
# Prevents https://github.com/PyCQA/pylint/issues/1884
assert isinstance(attr_node, nodes.Unknown)
def test_dont_consider_assignments_but_without_attrs(self) -> None:
code = """
import attr
class Cls: pass
@attr.s
class Foo:
temp = Cls()
temp.prop = 5
bar_thing = attr.ib(default=temp)
Foo()
"""
next(astroid.extract_node(code).infer())
def test_attrs_with_annotation(self) -> None:
code = """
import attr
@attr.s
class Foo:
bar: int = attr.ib(default=5)
Foo()
"""
should_be_unknown = next(astroid.extract_node(code).infer()).getattr("bar")[0]
self.assertIsInstance(should_be_unknown, astroid.Unknown)
|
