unittest_builder.py

# Copyright (c) 2006-2014 LOGILAB S.A. (Paris, FRANCE) <contact@logilab.fr>
# Copyright (c) 2014-2020 Claudiu Popa <pcmanticore@gmail.com>
# Copyright (c) 2014-2015 Google, Inc.
# Copyright (c) 2015-2016 Ceridwen <ceridwenv@gmail.com>
# Copyright (c) 2015 Florian Bruhin <me@the-compiler.org>
# Copyright (c) 2016 Jakub Wilk <jwilk@jwilk.net>
# Copyright (c) 2017 Bryce Guinta <bryce.paul.guinta@gmail.com>
# Copyright (c) 2017 Łukasz Rogalski <rogalski.91@gmail.com>
# Copyright (c) 2018 Ville Skyttä <ville.skytta@iki.fi>
# Copyright (c) 2018 brendanator <brendan.maginnis@gmail.com>
# Copyright (c) 2018 Anthony Sottile <asottile@umich.edu>
# Copyright (c) 2019 Ashley Whetter <ashley@awhetter.co.uk>
# Copyright (c) 2019 Hugo van Kemenade <hugovk@users.noreply.github.com>
# Copyright (c) 2020-2021 hippo91 <guillaume.peillex@gmail.com>
# Copyright (c) 2021 Pierre Sassoulas <pierre.sassoulas@gmail.com>
# Copyright (c) 2021 Marc Mueller <30130371+cdce8p@users.noreply.github.com>
# Copyright (c) 2021 Andrew Haigh <hello@nelf.in>
# Copyright (c) 2021 pre-commit-ci[bot] <bot@noreply.github.com>

# 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

"""tests for the astroid builder and rebuilder module"""

import collections
import os
import socket
import sys
import unittest

import pytest

from astroid import Instance, builder, nodes, test_utils, util
from astroid.const import PY38_PLUS
from astroid.exceptions import (
    AstroidBuildingError,
    AstroidSyntaxError,
    AttributeInferenceError,
    InferenceError,
)
from astroid.nodes.scoped_nodes import Module

from . import resources


class FromToLineNoTest(unittest.TestCase):
    def setUp(self) -> None:
        self.astroid = resources.build_file("data/format.py")

    def test_callfunc_lineno(self) -> None:
        stmts = self.astroid.body
        # on line 4:
        #    function('aeozrijz\
        #    earzer', hop)
        discard = stmts[0]
        self.assertIsInstance(discard, nodes.Expr)
        self.assertEqual(discard.fromlineno, 4)
        self.assertEqual(discard.tolineno, 5)
        callfunc = discard.value
        self.assertIsInstance(callfunc, nodes.Call)
        self.assertEqual(callfunc.fromlineno, 4)
        self.assertEqual(callfunc.tolineno, 5)
        name = callfunc.func
        self.assertIsInstance(name, nodes.Name)
        self.assertEqual(name.fromlineno, 4)
        self.assertEqual(name.tolineno, 4)
        strarg = callfunc.args[0]
        self.assertIsInstance(strarg, nodes.Const)
        if hasattr(sys, "pypy_version_info"):
            lineno = 4
        else:
            lineno = 5 if not PY38_PLUS else 4
        self.assertEqual(strarg.fromlineno, lineno)
        self.assertEqual(strarg.tolineno, lineno)
        namearg = callfunc.args[1]
        self.assertIsInstance(namearg, nodes.Name)
        self.assertEqual(namearg.fromlineno, 5)
        self.assertEqual(namearg.tolineno, 5)
        # on line 10:
        #    fonction(1,
        #             2,
        #             3,
        #             4)
        discard = stmts[2]
        self.assertIsInstance(discard, nodes.Expr)
        self.assertEqual(discard.fromlineno, 10)
        self.assertEqual(discard.tolineno, 13)
        callfunc = discard.value
        self.assertIsInstance(callfunc, nodes.Call)
        self.assertEqual(callfunc.fromlineno, 10)
        self.assertEqual(callfunc.tolineno, 13)
        name = callfunc.func
        self.assertIsInstance(name, nodes.Name)
        self.assertEqual(name.fromlineno, 10)
        self.assertEqual(name.tolineno, 10)
        for i, arg in enumerate(callfunc.args):
            self.assertIsInstance(arg, nodes.Const)
            self.assertEqual(arg.fromlineno, 10 + i)
            self.assertEqual(arg.tolineno, 10 + i)

    @pytest.mark.skip(
        "FIXME  http://bugs.python.org/issue10445 (no line number on function args)"
    )
    def test_function_lineno(self) -> None:
        stmts = self.astroid.body
        # on line 15:
        #    def definition(a,
        #                   b,
        #                   c):
        #        return a + b + c
        function = stmts[3]
        self.assertIsInstance(function, nodes.FunctionDef)
        self.assertEqual(function.fromlineno, 15)
        self.assertEqual(function.tolineno, 18)
        return_ = function.body[0]
        self.assertIsInstance(return_, nodes.Return)
        self.assertEqual(return_.fromlineno, 18)
        self.assertEqual(return_.tolineno, 18)

    def test_decorated_function_lineno(self) -> None:
        astroid = builder.parse(
            """
            @decorator
            def function(
                arg):
                print (arg)
            """,
            __name__,
        )
        function = astroid["function"]
        # XXX discussable, but that's what is expected by pylint right now
        self.assertEqual(function.fromlineno, 3)
        self.assertEqual(function.tolineno, 5)
        self.assertEqual(function.decorators.fromlineno, 2)
        self.assertEqual(function.decorators.tolineno, 2)

    def test_class_lineno(self) -> None:
        stmts = self.astroid.body
        # on line 20:
        #    class debile(dict,
        #                 object):
        #       pass
        class_ = stmts[4]
        self.assertIsInstance(class_, nodes.ClassDef)
        self.assertEqual(class_.fromlineno, 20)
        self.assertEqual(class_.tolineno, 22)
        self.assertEqual(class_.blockstart_tolineno, 21)
        pass_ = class_.body[0]
        self.assertIsInstance(pass_, nodes.Pass)
        self.assertEqual(pass_.fromlineno, 22)
        self.assertEqual(pass_.tolineno, 22)

    def test_if_lineno(self) -> None:
        stmts = self.astroid.body
        # on line 20:
        #    if aaaa: pass
        #    else:
        #        aaaa,bbbb = 1,2
        #        aaaa,bbbb = bbbb,aaaa
        if_ = stmts[5]
        self.assertIsInstance(if_, nodes.If)
        self.assertEqual(if_.fromlineno, 24)
        self.assertEqual(if_.tolineno, 27)
        self.assertEqual(if_.blockstart_tolineno, 24)
        self.assertEqual(if_.orelse[0].fromlineno, 26)
        self.assertEqual(if_.orelse[1].tolineno, 27)

    def test_for_while_lineno(self) -> None:
        for code in (
            """
            for a in range(4):
              print (a)
              break
            else:
              print ("bouh")
            """,
            """
            while a:
              print (a)
              break
            else:
              print ("bouh")
            """,
        ):
            astroid = builder.parse(code, __name__)
            stmt = astroid.body[0]
            self.assertEqual(stmt.fromlineno, 2)
            self.assertEqual(stmt.tolineno, 6)
            self.assertEqual(stmt.blockstart_tolineno, 2)
            self.assertEqual(stmt.orelse[0].fromlineno, 6)  # XXX
            self.assertEqual(stmt.orelse[0].tolineno, 6)

    def test_try_except_lineno(self) -> None:
        astroid = builder.parse(
            """
            try:
              print (a)
            except:
              pass
            else:
              print ("bouh")
            """,
            __name__,
        )
        try_ = astroid.body[0]
        self.assertEqual(try_.fromlineno, 2)
        self.assertEqual(try_.tolineno, 7)
        self.assertEqual(try_.blockstart_tolineno, 2)
        self.assertEqual(try_.orelse[0].fromlineno, 7)  # XXX
        self.assertEqual(try_.orelse[0].tolineno, 7)
        hdlr = try_.handlers[0]
        self.assertEqual(hdlr.fromlineno, 4)
        self.assertEqual(hdlr.tolineno, 5)
        self.assertEqual(hdlr.blockstart_tolineno, 4)

    def test_try_finally_lineno(self) -> None:
        astroid = builder.parse(
            """
            try:
              print (a)
            finally:
              print ("bouh")
            """,
            __name__,
        )
        try_ = astroid.body[0]
        self.assertEqual(try_.fromlineno, 2)
        self.assertEqual(try_.tolineno, 5)
        self.assertEqual(try_.blockstart_tolineno, 2)
        self.assertEqual(try_.finalbody[0].fromlineno, 5)  # XXX
        self.assertEqual(try_.finalbody[0].tolineno, 5)

    def test_try_finally_25_lineno(self) -> None:
        astroid = builder.parse(
            """
            try:
              print (a)
            except:
              pass
            finally:
              print ("bouh")
            """,
            __name__,
        )
        try_ = astroid.body[0]
        self.assertEqual(try_.fromlineno, 2)
        self.assertEqual(try_.tolineno, 7)
        self.assertEqual(try_.blockstart_tolineno, 2)
        self.assertEqual(try_.finalbody[0].fromlineno, 7)  # XXX
        self.assertEqual(try_.finalbody[0].tolineno, 7)

    def test_with_lineno(self) -> None:
        astroid = builder.parse(
            """
            from __future__ import with_statement
            with file("/tmp/pouet") as f:
                print (f)
            """,
            __name__,
        )
        with_ = astroid.body[1]
        self.assertEqual(with_.fromlineno, 3)
        self.assertEqual(with_.tolineno, 4)
        self.assertEqual(with_.blockstart_tolineno, 3)


class BuilderTest(unittest.TestCase):
    def setUp(self) -> None:
        self.manager = test_utils.brainless_manager()
        self.builder = builder.AstroidBuilder(self.manager)

    def test_data_build_null_bytes(self) -> None:
        with self.assertRaises(AstroidSyntaxError):
            self.builder.string_build("\x00")

    def test_data_build_invalid_x_escape(self) -> None:
        with self.assertRaises(AstroidSyntaxError):
            self.builder.string_build('"\\x1"')

    def test_missing_newline(self) -> None:
        """check that a file with no trailing new line is parseable"""
        resources.build_file("data/noendingnewline.py")

    def test_missing_file(self) -> None:
        with self.assertRaises(AstroidBuildingError):
            resources.build_file("data/inexistant.py")

    def test_inspect_build0(self) -> None:
        """test astroid tree build from a living object"""
        builtin_ast = self.manager.ast_from_module_name("builtins")
        # just check type and object are there
        builtin_ast.getattr("type")
        objectastroid = builtin_ast.getattr("object")[0]
        self.assertIsInstance(objectastroid.getattr("__new__")[0], nodes.FunctionDef)
        # check open file alias
        builtin_ast.getattr("open")
        # check 'help' is there (defined dynamically by site.py)
        builtin_ast.getattr("help")
        # check property has __init__
        pclass = builtin_ast["property"]
        self.assertIn("__init__", pclass)
        self.assertIsInstance(builtin_ast["None"], nodes.Const)
        self.assertIsInstance(builtin_ast["True"], nodes.Const)
        self.assertIsInstance(builtin_ast["False"], nodes.Const)
        self.assertIsInstance(builtin_ast["Exception"], nodes.ClassDef)
        self.assertIsInstance(builtin_ast["NotImplementedError"], nodes.ClassDef)

    def test_inspect_build1(self) -> None:
        time_ast = self.manager.ast_from_module_name("time")
        self.assertTrue(time_ast)
        self.assertEqual(time_ast["time"].args.defaults, [])

    def test_inspect_build3(self) -> None:
        self.builder.inspect_build(unittest)

    def test_inspect_build_type_object(self) -> None:
        builtin_ast = self.manager.ast_from_module_name("builtins")

        inferred = list(builtin_ast.igetattr("object"))
        self.assertEqual(len(inferred), 1)
        inferred = inferred[0]
        self.assertEqual(inferred.name, "object")
        inferred.as_string()  # no crash test

        inferred = list(builtin_ast.igetattr("type"))
        self.assertEqual(len(inferred), 1)
        inferred = inferred[0]
        self.assertEqual(inferred.name, "type")
        inferred.as_string()  # no crash test

    def test_inspect_transform_module(self) -> None:
        # ensure no cached version of the time module
        self.manager._mod_file_cache.pop(("time", None), None)
        self.manager.astroid_cache.pop("time", None)

        def transform_time(node: Module) -> None:
            if node.name == "time":
                node.transformed = True

        self.manager.register_transform(nodes.Module, transform_time)
        try:
            time_ast = self.manager.ast_from_module_name("time")
            self.assertTrue(getattr(time_ast, "transformed", False))
        finally:
            self.manager.unregister_transform(nodes.Module, transform_time)

    def test_package_name(self) -> None:
        """test base properties and method of an astroid module"""
        datap = resources.build_file("data/__init__.py", "data")
        self.assertEqual(datap.name, "data")
        self.assertEqual(datap.package, 1)
        datap = resources.build_file("data/__init__.py", "data.__init__")
        self.assertEqual(datap.name, "data")
        self.assertEqual(datap.package, 1)
        datap = resources.build_file("data/tmp__init__.py", "data.tmp__init__")
        self.assertEqual(datap.name, "data.tmp__init__")
        self.assertEqual(datap.package, 0)

    def test_yield_parent(self) -> None:
        """check if we added discard nodes as yield parent (w/ compiler)"""
        code = """
            def yiell(): #@
                yield 0
                if noe:
                    yield more
        """
        func = builder.extract_node(code)
        self.assertIsInstance(func, nodes.FunctionDef)
        stmt = func.body[0]
        self.assertIsInstance(stmt, nodes.Expr)
        self.assertIsInstance(stmt.value, nodes.Yield)
        self.assertIsInstance(func.body[1].body[0], nodes.Expr)
        self.assertIsInstance(func.body[1].body[0].value, nodes.Yield)

    def test_object(self) -> None:
        obj_ast = self.builder.inspect_build(object)
        self.assertIn("__setattr__", obj_ast)

    def test_newstyle_detection(self) -> None:
        data = """
            class A:
                "old style"

            class B(A):
                "old style"

            class C(object):
                "new style"

            class D(C):
                "new style"

            __metaclass__ = type

            class E(A):
                "old style"

            class F:
                "new style"
        """
        mod_ast = builder.parse(data, __name__)
        self.assertTrue(mod_ast["A"].newstyle)
        self.assertTrue(mod_ast["B"].newstyle)
        self.assertTrue(mod_ast["E"].newstyle)
        self.assertTrue(mod_ast["C"].newstyle)
        self.assertTrue(mod_ast["D"].newstyle)
        self.assertTrue(mod_ast["F"].newstyle)

    def test_globals(self) -> None:
        data = """
            CSTE = 1

            def update_global():
                global CSTE
                CSTE += 1

            def global_no_effect():
                global CSTE2
                print (CSTE)
        """
        astroid = builder.parse(data, __name__)
        self.assertEqual(len(astroid.getattr("CSTE")), 2)
        self.assertIsInstance(astroid.getattr("CSTE")[0], nodes.AssignName)
        self.assertEqual(astroid.getattr("CSTE")[0].fromlineno, 2)
        self.assertEqual(astroid.getattr("CSTE")[1].fromlineno, 6)
        with self.assertRaises(AttributeInferenceError):
            astroid.getattr("CSTE2")
        with self.assertRaises(InferenceError):
            next(astroid["global_no_effect"].ilookup("CSTE2"))

    def test_socket_build(self) -> None:
        astroid = self.builder.module_build(socket)
        # XXX just check the first one. Actually 3 objects are inferred (look at
        # the socket module) but the last one as those attributes dynamically
        # set and astroid is missing this.
        for fclass in astroid.igetattr("socket"):
            self.assertIn("connect", fclass)
            self.assertIn("send", fclass)
            self.assertIn("close", fclass)
            break

    def test_gen_expr_var_scope(self) -> None:
        data = "l = list(n for n in range(10))\n"
        astroid = builder.parse(data, __name__)
        # n unavailable outside gen expr scope
        self.assertNotIn("n", astroid)
        # test n is inferable anyway
        n = test_utils.get_name_node(astroid, "n")
        self.assertIsNot(n.scope(), astroid)
        self.assertEqual([i.__class__ for i in n.infer()], [util.Uninferable.__class__])

    def test_no_future_imports(self) -> None:
        mod = builder.parse("import sys")
        self.assertEqual(set(), mod.future_imports)

    def test_future_imports(self) -> None:
        mod = builder.parse("from __future__ import print_function")
        self.assertEqual({"print_function"}, mod.future_imports)

    def test_two_future_imports(self) -> None:
        mod = builder.parse(
            """
            from __future__ import print_function
            from __future__ import absolute_import
            """
        )
        self.assertEqual({"print_function", "absolute_import"}, mod.future_imports)

    def test_inferred_build(self) -> None:
        code = """
            class A: pass
            A.type = "class"

            def A_assign_type(self):
                print (self)
            A.assign_type = A_assign_type
            """
        astroid = builder.parse(code)
        lclass = list(astroid.igetattr("A"))
        self.assertEqual(len(lclass), 1)
        lclass = lclass[0]
        self.assertIn("assign_type", lclass.locals)
        self.assertIn("type", lclass.locals)

    def test_infer_can_assign_regular_object(self) -> None:
        mod = builder.parse(
            """
            class A:
                pass
            a = A()
            a.value = "is set"
            a.other = "is set"
        """
        )
        obj = list(mod.igetattr("a"))
        self.assertEqual(len(obj), 1)
        obj = obj[0]
        self.assertIsInstance(obj, Instance)
        self.assertIn("value", obj.instance_attrs)
        self.assertIn("other", obj.instance_attrs)

    def test_infer_can_assign_has_slots(self) -> None:
        mod = builder.parse(
            """
            class A:
                __slots__ = ('value',)
            a = A()
            a.value = "is set"
            a.other = "not set"
        """
        )
        obj = list(mod.igetattr("a"))
        self.assertEqual(len(obj), 1)
        obj = obj[0]
        self.assertIsInstance(obj, Instance)
        self.assertIn("value", obj.instance_attrs)
        self.assertNotIn("other", obj.instance_attrs)

    def test_infer_can_assign_no_classdict(self) -> None:
        mod = builder.parse(
            """
            a = object()
            a.value = "not set"
        """
        )
        obj = list(mod.igetattr("a"))
        self.assertEqual(len(obj), 1)
        obj = obj[0]
        self.assertIsInstance(obj, Instance)
        self.assertNotIn("value", obj.instance_attrs)

    def test_augassign_attr(self) -> None:
        builder.parse(
            """
            class Counter:
                v = 0
                def inc(self):
                    self.v += 1
            """,
            __name__,
        )
        # TODO: Check self.v += 1 generate AugAssign(AssAttr(...)),
        # not AugAssign(GetAttr(AssName...))

    def test_inferred_dont_pollute(self) -> None:
        code = """
            def func(a=None):
                a.custom_attr = 0
            def func2(a={}):
                a.custom_attr = 0
            """
        builder.parse(code)
        nonetype = nodes.const_factory(None)
        self.assertNotIn("custom_attr", nonetype.locals)
        self.assertNotIn("custom_attr", nonetype.instance_attrs)
        nonetype = nodes.const_factory({})
        self.assertNotIn("custom_attr", nonetype.locals)
        self.assertNotIn("custom_attr", nonetype.instance_attrs)

    def test_asstuple(self) -> None:
        code = "a, b = range(2)"
        astroid = builder.parse(code)
        self.assertIn("b", astroid.locals)
        code = """
            def visit_if(self, node):
                node.test, body = node.tests[0]
            """
        astroid = builder.parse(code)
        self.assertIn("body", astroid["visit_if"].locals)

    def test_build_constants(self) -> None:
        """test expected values of constants after rebuilding"""
        code = """
            def func():
                return None
                return
                return 'None'
            """
        astroid = builder.parse(code)
        none, nothing, chain = (ret.value for ret in astroid.body[0].body)
        self.assertIsInstance(none, nodes.Const)
        self.assertIsNone(none.value)
        self.assertIsNone(nothing)
        self.assertIsInstance(chain, nodes.Const)
        self.assertEqual(chain.value, "None")

    def test_not_implemented(self) -> None:
        node = builder.extract_node(
            """
        NotImplemented #@
        """
        )
        inferred = next(node.infer())
        self.assertIsInstance(inferred, nodes.Const)
        self.assertEqual(inferred.value, NotImplemented)


class FileBuildTest(unittest.TestCase):
    def setUp(self) -> None:
        self.module = resources.build_file("data/module.py", "data.module")

    def test_module_base_props(self) -> None:
        """test base properties and method of an astroid module"""
        module = self.module
        self.assertEqual(module.name, "data.module")
        self.assertEqual(module.doc, "test module for astroid\n")
        self.assertEqual(module.fromlineno, 0)
        self.assertIsNone(module.parent)
        self.assertEqual(module.frame(), module)
        self.assertEqual(module.root(), module)
        self.assertEqual(module.file, os.path.abspath(resources.find("data/module.py")))
        self.assertEqual(module.pure_python, 1)
        self.assertEqual(module.package, 0)
        self.assertFalse(module.is_statement)
        self.assertEqual(module.statement(), module)
        self.assertEqual(module.statement(), module)

    def test_module_locals(self) -> None:
        """test the 'locals' dictionary of an astroid module"""
        module = self.module
        _locals = module.locals
        self.assertIs(_locals, module.globals)
        keys = sorted(_locals.keys())
        should = [
            "MY_DICT",
            "NameNode",
            "YO",
            "YOUPI",
            "__revision__",
            "global_access",
            "modutils",
            "four_args",
            "os",
            "redirect",
        ]
        should.sort()
        self.assertEqual(keys, sorted(should))

    def test_function_base_props(self) -> None:
        """test base properties and method of an astroid function"""
        module = self.module
        function = module["global_access"]
        self.assertEqual(function.name, "global_access")
        self.assertEqual(function.doc, "function test")
        self.assertEqual(function.fromlineno, 11)
        self.assertTrue(function.parent)
        self.assertEqual(function.frame(), function)
        self.assertEqual(function.parent.frame(), module)
        self.assertEqual(function.root(), module)
        self.assertEqual([n.name for n in function.args.args], ["key", "val"])
        self.assertEqual(function.type, "function")

    def test_function_locals(self) -> None:
        """test the 'locals' dictionary of an astroid function"""
        _locals = self.module["global_access"].locals
        self.assertEqual(len(_locals), 4)
        keys = sorted(_locals.keys())
        self.assertEqual(keys, ["i", "key", "local", "val"])

    def test_class_base_props(self) -> None:
        """test base properties and method of an astroid class"""
        module = self.module
        klass = module["YO"]
        self.assertEqual(klass.name, "YO")
        self.assertEqual(klass.doc, "hehe\n    haha")
        self.assertEqual(klass.fromlineno, 25)
        self.assertTrue(klass.parent)
        self.assertEqual(klass.frame(), klass)
        self.assertEqual(klass.parent.frame(), module)
        self.assertEqual(klass.root(), module)
        self.assertEqual(klass.basenames, [])
        self.assertTrue(klass.newstyle)

    def test_class_locals(self) -> None:
        """test the 'locals' dictionary of an astroid class"""
        module = self.module
        klass1 = module["YO"]
        locals1 = klass1.locals
        keys = sorted(locals1.keys())
        assert_keys = ["__init__", "__module__", "__qualname__", "a"]
        self.assertEqual(keys, assert_keys)
        klass2 = module["YOUPI"]
        locals2 = klass2.locals
        keys = locals2.keys()
        assert_keys = [
            "__init__",
            "__module__",
            "__qualname__",
            "class_attr",
            "class_method",
            "method",
            "static_method",
        ]
        self.assertEqual(sorted(keys), assert_keys)

    def test_class_instance_attrs(self) -> None:
        module = self.module
        klass1 = module["YO"]
        klass2 = module["YOUPI"]
        self.assertEqual(list(klass1.instance_attrs.keys()), ["yo"])
        self.assertEqual(list(klass2.instance_attrs.keys()), ["member"])

    def test_class_basenames(self) -> None:
        module = self.module
        klass1 = module["YO"]
        klass2 = module["YOUPI"]
        self.assertEqual(klass1.basenames, [])
        self.assertEqual(klass2.basenames, ["YO"])

    def test_method_base_props(self) -> None:
        """test base properties and method of an astroid method"""
        klass2 = self.module["YOUPI"]
        # "normal" method
        method = klass2["method"]
        self.assertEqual(method.name, "method")
        self.assertEqual([n.name for n in method.args.args], ["self"])
        self.assertEqual(method.doc, "method\n        test")
        self.assertEqual(method.fromlineno, 48)
        self.assertEqual(method.type, "method")
        # class method
        method = klass2["class_method"]
        self.assertEqual([n.name for n in method.args.args], ["cls"])
        self.assertEqual(method.type, "classmethod")
        # static method
        method = klass2["static_method"]
        self.assertEqual(method.args.args, [])
        self.assertEqual(method.type, "staticmethod")

    def test_method_locals(self) -> None:
        """test the 'locals' dictionary of an astroid method"""
        method = self.module["YOUPI"]["method"]
        _locals = method.locals
        keys = sorted(_locals)
        # ListComp variables are not accessible outside
        self.assertEqual(len(_locals), 3)
        self.assertEqual(keys, ["autre", "local", "self"])

    def test_unknown_encoding(self) -> None:
        with self.assertRaises(AstroidSyntaxError):
            resources.build_file("data/invalid_encoding.py")


def test_module_build_dunder_file() -> None:
    """Test that module_build() can work with modules that have the *__file__* attribute"""
    module = builder.AstroidBuilder().module_build(collections)
    assert module.path[0] == collections.__file__


@pytest.mark.skipif(
    PY38_PLUS,
    reason=(
        "The builtin ast module does not fail with a specific error "
        "for syntax error caused by invalid type comments."
    ),
)
def test_parse_module_with_invalid_type_comments_does_not_crash():
    node = builder.parse(
        """
    # op {
    #   name: "AssignAddVariableOp"
    #   input_arg {
    #     name: "resource"
    #     type: DT_RESOURCE
    #   }
    #   input_arg {
    #     name: "value"
    #     type_attr: "dtype"
    #   }
    #   attr {
    #     name: "dtype"
    #     type: "type"
    #   }
    #   is_stateful: true
    # }
    a, b = 2
    """
    )
    assert isinstance(node, nodes.Module)


if __name__ == "__main__":
    unittest.main()