355 lines
13 KiB
Python
355 lines
13 KiB
Python
# Copyright (c) 2013-2016 Claudiu Popa <pcmanticore@gmail.com>
|
|
# Copyright (c) 2014 Google, Inc.
|
|
# Copyright (c) 2015-2016 Cara Vinson <ceridwenv@gmail.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/master/COPYING.LESSER
|
|
|
|
from textwrap import dedent
|
|
import unittest
|
|
|
|
from astroid import nodes
|
|
from astroid.node_classes import Assign, Expr, YieldFrom, Name, Const
|
|
from astroid.builder import AstroidBuilder, extract_node
|
|
from astroid.scoped_nodes import ClassDef, FunctionDef
|
|
from astroid.test_utils import require_version
|
|
|
|
|
|
class Python3TC(unittest.TestCase):
|
|
@classmethod
|
|
def setUpClass(cls):
|
|
cls.builder = AstroidBuilder()
|
|
|
|
@require_version('3.0')
|
|
def test_starred_notation(self):
|
|
astroid = self.builder.string_build("*a, b = [1, 2, 3]", 'test', 'test')
|
|
|
|
# Get the star node
|
|
node = next(next(next(astroid.get_children()).get_children()).get_children())
|
|
|
|
self.assertTrue(isinstance(node.assign_type(), Assign))
|
|
|
|
@require_version('3.3')
|
|
def test_yield_from(self):
|
|
body = dedent("""
|
|
def func():
|
|
yield from iter([1, 2])
|
|
""")
|
|
astroid = self.builder.string_build(body)
|
|
func = astroid.body[0]
|
|
self.assertIsInstance(func, FunctionDef)
|
|
yieldfrom_stmt = func.body[0]
|
|
|
|
self.assertIsInstance(yieldfrom_stmt, Expr)
|
|
self.assertIsInstance(yieldfrom_stmt.value, YieldFrom)
|
|
self.assertEqual(yieldfrom_stmt.as_string(),
|
|
'yield from iter([1, 2])')
|
|
|
|
@require_version('3.3')
|
|
def test_yield_from_is_generator(self):
|
|
body = dedent("""
|
|
def func():
|
|
yield from iter([1, 2])
|
|
""")
|
|
astroid = self.builder.string_build(body)
|
|
func = astroid.body[0]
|
|
self.assertIsInstance(func, FunctionDef)
|
|
self.assertTrue(func.is_generator())
|
|
|
|
@require_version('3.3')
|
|
def test_yield_from_as_string(self):
|
|
body = dedent("""
|
|
def func():
|
|
yield from iter([1, 2])
|
|
value = yield from other()
|
|
""")
|
|
astroid = self.builder.string_build(body)
|
|
func = astroid.body[0]
|
|
self.assertEqual(func.as_string().strip(), body.strip())
|
|
|
|
# metaclass tests
|
|
|
|
@require_version('3.0')
|
|
def test_simple_metaclass(self):
|
|
astroid = self.builder.string_build("class Test(metaclass=type): pass")
|
|
klass = astroid.body[0]
|
|
|
|
metaclass = klass.metaclass()
|
|
self.assertIsInstance(metaclass, ClassDef)
|
|
self.assertEqual(metaclass.name, 'type')
|
|
|
|
@require_version('3.0')
|
|
def test_metaclass_error(self):
|
|
astroid = self.builder.string_build("class Test(metaclass=typ): pass")
|
|
klass = astroid.body[0]
|
|
self.assertFalse(klass.metaclass())
|
|
|
|
@require_version('3.0')
|
|
def test_metaclass_imported(self):
|
|
astroid = self.builder.string_build(dedent("""
|
|
from abc import ABCMeta
|
|
class Test(metaclass=ABCMeta): pass"""))
|
|
klass = astroid.body[1]
|
|
|
|
metaclass = klass.metaclass()
|
|
self.assertIsInstance(metaclass, ClassDef)
|
|
self.assertEqual(metaclass.name, 'ABCMeta')
|
|
|
|
@require_version('3.0')
|
|
def test_metaclass_multiple_keywords(self):
|
|
astroid = self.builder.string_build("class Test(magic=None, metaclass=type): pass")
|
|
klass = astroid.body[0]
|
|
|
|
metaclass = klass.metaclass()
|
|
self.assertIsInstance(metaclass, ClassDef)
|
|
self.assertEqual(metaclass.name, 'type')
|
|
|
|
@require_version('3.0')
|
|
def test_as_string(self):
|
|
body = dedent("""
|
|
from abc import ABCMeta
|
|
class Test(metaclass=ABCMeta): pass""")
|
|
astroid = self.builder.string_build(body)
|
|
klass = astroid.body[1]
|
|
|
|
self.assertEqual(klass.as_string(),
|
|
'\n\nclass Test(metaclass=ABCMeta):\n pass\n')
|
|
|
|
@require_version('3.0')
|
|
def test_old_syntax_works(self):
|
|
astroid = self.builder.string_build(dedent("""
|
|
class Test:
|
|
__metaclass__ = type
|
|
class SubTest(Test): pass
|
|
"""))
|
|
klass = astroid['SubTest']
|
|
metaclass = klass.metaclass()
|
|
self.assertIsNone(metaclass)
|
|
|
|
@require_version('3.0')
|
|
def test_metaclass_yes_leak(self):
|
|
astroid = self.builder.string_build(dedent("""
|
|
# notice `ab` instead of `abc`
|
|
from ab import ABCMeta
|
|
|
|
class Meta(metaclass=ABCMeta): pass
|
|
"""))
|
|
klass = astroid['Meta']
|
|
self.assertIsNone(klass.metaclass())
|
|
|
|
@require_version('3.0')
|
|
def test_parent_metaclass(self):
|
|
astroid = self.builder.string_build(dedent("""
|
|
from abc import ABCMeta
|
|
class Test(metaclass=ABCMeta): pass
|
|
class SubTest(Test): pass
|
|
"""))
|
|
klass = astroid['SubTest']
|
|
self.assertTrue(klass.newstyle)
|
|
metaclass = klass.metaclass()
|
|
self.assertIsInstance(metaclass, ClassDef)
|
|
self.assertEqual(metaclass.name, 'ABCMeta')
|
|
|
|
@require_version('3.0')
|
|
def test_metaclass_ancestors(self):
|
|
astroid = self.builder.string_build(dedent("""
|
|
from abc import ABCMeta
|
|
|
|
class FirstMeta(metaclass=ABCMeta): pass
|
|
class SecondMeta(metaclass=type):
|
|
pass
|
|
|
|
class Simple:
|
|
pass
|
|
|
|
class FirstImpl(FirstMeta): pass
|
|
class SecondImpl(FirstImpl): pass
|
|
class ThirdImpl(Simple, SecondMeta):
|
|
pass
|
|
"""))
|
|
classes = {
|
|
'ABCMeta': ('FirstImpl', 'SecondImpl'),
|
|
'type': ('ThirdImpl', )
|
|
}
|
|
for metaclass, names in classes.items():
|
|
for name in names:
|
|
impl = astroid[name]
|
|
meta = impl.metaclass()
|
|
self.assertIsInstance(meta, ClassDef)
|
|
self.assertEqual(meta.name, metaclass)
|
|
|
|
@require_version('3.0')
|
|
def test_annotation_support(self):
|
|
astroid = self.builder.string_build(dedent("""
|
|
def test(a: int, b: str, c: None, d, e,
|
|
*args: float, **kwargs: int)->int:
|
|
pass
|
|
"""))
|
|
func = astroid['test']
|
|
self.assertIsInstance(func.args.varargannotation, Name)
|
|
self.assertEqual(func.args.varargannotation.name, 'float')
|
|
self.assertIsInstance(func.args.kwargannotation, Name)
|
|
self.assertEqual(func.args.kwargannotation.name, 'int')
|
|
self.assertIsInstance(func.returns, Name)
|
|
self.assertEqual(func.returns.name, 'int')
|
|
arguments = func.args
|
|
self.assertIsInstance(arguments.annotations[0], Name)
|
|
self.assertEqual(arguments.annotations[0].name, 'int')
|
|
self.assertIsInstance(arguments.annotations[1], Name)
|
|
self.assertEqual(arguments.annotations[1].name, 'str')
|
|
self.assertIsInstance(arguments.annotations[2], Const)
|
|
self.assertIsNone(arguments.annotations[2].value)
|
|
self.assertIsNone(arguments.annotations[3])
|
|
self.assertIsNone(arguments.annotations[4])
|
|
|
|
astroid = self.builder.string_build(dedent("""
|
|
def test(a: int=1, b: str=2):
|
|
pass
|
|
"""))
|
|
func = astroid['test']
|
|
self.assertIsInstance(func.args.annotations[0], Name)
|
|
self.assertEqual(func.args.annotations[0].name, 'int')
|
|
self.assertIsInstance(func.args.annotations[1], Name)
|
|
self.assertEqual(func.args.annotations[1].name, 'str')
|
|
self.assertIsNone(func.returns)
|
|
|
|
@require_version('3.0')
|
|
def test_kwonlyargs_annotations_supper(self):
|
|
node = self.builder.string_build(dedent("""
|
|
def test(*, a: int, b: str, c: None, d, e):
|
|
pass
|
|
"""))
|
|
func = node['test']
|
|
arguments = func.args
|
|
self.assertIsInstance(arguments.kwonlyargs_annotations[0], Name)
|
|
self.assertEqual(arguments.kwonlyargs_annotations[0].name, 'int')
|
|
self.assertIsInstance(arguments.kwonlyargs_annotations[1], Name)
|
|
self.assertEqual(arguments.kwonlyargs_annotations[1].name, 'str')
|
|
self.assertIsInstance(arguments.kwonlyargs_annotations[2], Const)
|
|
self.assertIsNone(arguments.kwonlyargs_annotations[2].value)
|
|
self.assertIsNone(arguments.kwonlyargs_annotations[3])
|
|
self.assertIsNone(arguments.kwonlyargs_annotations[4])
|
|
|
|
@require_version('3.0')
|
|
def test_annotation_as_string(self):
|
|
code1 = dedent('''
|
|
def test(a, b:int=4, c=2, f:'lala'=4)->2:
|
|
pass''')
|
|
code2 = dedent('''
|
|
def test(a:typing.Generic[T], c:typing.Any=24)->typing.Iterable:
|
|
pass''')
|
|
for code in (code1, code2):
|
|
func = extract_node(code)
|
|
self.assertEqual(func.as_string(), code)
|
|
|
|
@require_version('3.5')
|
|
def test_unpacking_in_dicts(self):
|
|
code = "{'x': 1, **{'y': 2}}"
|
|
node = extract_node(code)
|
|
self.assertEqual(node.as_string(), code)
|
|
keys = [key for (key, _) in node.items]
|
|
self.assertIsInstance(keys[0], nodes.Const)
|
|
self.assertIsInstance(keys[1], nodes.DictUnpack)
|
|
|
|
@require_version('3.5')
|
|
def test_nested_unpacking_in_dicts(self):
|
|
code = "{'x': 1, **{'y': 2, **{'z': 3}}}"
|
|
node = extract_node(code)
|
|
self.assertEqual(node.as_string(), code)
|
|
|
|
@require_version('3.5')
|
|
def test_unpacking_in_dict_getitem(self):
|
|
node = extract_node('{1:2, **{2:3, 3:4}, **{5: 6}}')
|
|
for key, expected in ((1, 2), (2, 3), (3, 4), (5, 6)):
|
|
value = node.getitem(nodes.Const(key))
|
|
self.assertIsInstance(value, nodes.Const)
|
|
self.assertEqual(value.value, expected)
|
|
|
|
@require_version('3.6')
|
|
def test_format_string(self):
|
|
code = "f'{greetings} {person}'"
|
|
node = extract_node(code)
|
|
self.assertEqual(node.as_string(), code)
|
|
|
|
@require_version('3.6')
|
|
def test_underscores_in_numeral_literal(self):
|
|
pairs = [
|
|
('10_1000', 101000),
|
|
('10_000_000', 10000000),
|
|
('0x_FF_FF', 65535),
|
|
]
|
|
for value, expected in pairs:
|
|
node = extract_node(value)
|
|
inferred = next(node.infer())
|
|
self.assertIsInstance(inferred, nodes.Const)
|
|
self.assertEqual(inferred.value, expected)
|
|
|
|
@require_version('3.6')
|
|
def test_async_comprehensions(self):
|
|
async_comprehensions = [
|
|
extract_node("async def f(): return __([i async for i in aiter() if i % 2])"),
|
|
extract_node("async def f(): return __({i async for i in aiter() if i % 2})"),
|
|
extract_node("async def f(): return __((i async for i in aiter() if i % 2))"),
|
|
extract_node("async def f(): return __({i: i async for i in aiter() if i % 2})")
|
|
]
|
|
non_async_comprehensions = [
|
|
extract_node("async def f(): return __({i: i for i in iter() if i % 2})")
|
|
]
|
|
|
|
for comp in async_comprehensions:
|
|
self.assertTrue(comp.generators[0].is_async)
|
|
for comp in non_async_comprehensions:
|
|
self.assertFalse(comp.generators[0].is_async)
|
|
|
|
@require_version('3.7')
|
|
def test_async_comprehensions_outside_coroutine(self):
|
|
# When async and await will become keywords, async comprehensions
|
|
# will be allowed outside of coroutines body
|
|
comprehensions = [
|
|
"[i async for i in aiter() if condition(i)]",
|
|
"[await fun() for fun in funcs]",
|
|
"{await fun() for fun in funcs}",
|
|
"{fun: await fun() for fun in funcs}",
|
|
"[await fun() for fun in funcs if await smth]",
|
|
"{await fun() for fun in funcs if await smth}",
|
|
"{fun: await fun() for fun in funcs if await smth}",
|
|
"[await fun() async for fun in funcs]",
|
|
"{await fun() async for fun in funcs}",
|
|
"{fun: await fun() async for fun in funcs}",
|
|
"[await fun() async for fun in funcs if await smth]",
|
|
"{await fun() async for fun in funcs if await smth}",
|
|
"{fun: await fun() async for fun in funcs if await smth}",
|
|
]
|
|
|
|
for comp in comprehensions:
|
|
node = extract_node(comp)
|
|
self.assertTrue(node.generators[0].is_async)
|
|
|
|
@require_version('3.6')
|
|
def test_async_comprehensions_as_string(self):
|
|
func_bodies = [
|
|
"return [i async for i in aiter() if condition(i)]",
|
|
"return [await fun() for fun in funcs]",
|
|
"return {await fun() for fun in funcs}",
|
|
"return {fun: await fun() for fun in funcs}",
|
|
"return [await fun() for fun in funcs if await smth]",
|
|
"return {await fun() for fun in funcs if await smth}",
|
|
"return {fun: await fun() for fun in funcs if await smth}",
|
|
"return [await fun() async for fun in funcs]",
|
|
"return {await fun() async for fun in funcs}",
|
|
"return {fun: await fun() async for fun in funcs}",
|
|
"return [await fun() async for fun in funcs if await smth]",
|
|
"return {await fun() async for fun in funcs if await smth}",
|
|
"return {fun: await fun() async for fun in funcs if await smth}",
|
|
]
|
|
for func_body in func_bodies:
|
|
code = dedent('''
|
|
async def f():
|
|
{}'''.format(func_body))
|
|
func = extract_node(code)
|
|
self.assertEqual(func.as_string().strip(), code.strip())
|
|
|
|
|
|
if __name__ == '__main__':
|
|
unittest.main()
|