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# Copyright (c) Meta Platforms, Inc. and affiliates.
#
# This source code is licensed under the MIT license found in the
# LICENSE file in the root directory of this source tree.
from typing import Any
import libcst as cst
from libcst import parse_statement
from libcst._nodes.tests.base import CSTNodeTest
from libcst.helpers import ensure_type
from libcst.metadata import CodeRange
from libcst.testing.utils import data_provider
class NonlocalConstructionTest(CSTNodeTest):
@data_provider(
(
# Single nonlocal statement
{
"node": cst.Nonlocal((cst.NameItem(cst.Name("a")),)),
"code": "nonlocal a",
},
# Multiple entries in nonlocal statement
{
"node": cst.Nonlocal(
(cst.NameItem(cst.Name("a")), cst.NameItem(cst.Name("b")))
),
"code": "nonlocal a, b",
"expected_position": CodeRange((1, 0), (1, 13)),
},
# Whitespace rendering test
{
"node": cst.Nonlocal(
(
cst.NameItem(
cst.Name("a"),
comma=cst.Comma(
whitespace_before=cst.SimpleWhitespace(" "),
whitespace_after=cst.SimpleWhitespace(" "),
),
),
cst.NameItem(cst.Name("b")),
),
whitespace_after_nonlocal=cst.SimpleWhitespace(" "),
),
"code": "nonlocal a , b",
"expected_position": CodeRange((1, 0), (1, 17)),
},
)
)
def test_valid(self, **kwargs: Any) -> None:
self.validate_node(**kwargs)
@data_provider(
(
# Validate construction
{
"get_node": lambda: cst.Nonlocal(()),
"expected_re": "A Nonlocal statement must have at least one NameItem",
},
# Validate whitespace handling
{
"get_node": lambda: cst.Nonlocal(
(cst.NameItem(cst.Name("a")),),
whitespace_after_nonlocal=cst.SimpleWhitespace(""),
),
"expected_re": "Must have at least one space after 'nonlocal' keyword",
},
# Validate comma handling
{
"get_node": lambda: cst.Nonlocal(
(cst.NameItem(cst.Name("a"), comma=cst.Comma()),)
),
"expected_re": "The last NameItem in a Nonlocal cannot have a trailing comma",
},
# Validate paren handling
{
"get_node": lambda: cst.Nonlocal(
(
cst.NameItem(
cst.Name(
"a", lpar=(cst.LeftParen(),), rpar=(cst.RightParen(),)
)
),
)
),
"expected_re": "Cannot have parens around names in NameItem",
},
)
)
def test_invalid(self, **kwargs: Any) -> None:
self.assert_invalid(**kwargs)
class NonlocalParsingTest(CSTNodeTest):
@data_provider(
(
# Single nonlocal statement
{
"node": cst.Nonlocal((cst.NameItem(cst.Name("a")),)),
"code": "nonlocal a",
},
# Multiple entries in nonlocal statement
{
"node": cst.Nonlocal(
(
cst.NameItem(
cst.Name("a"),
comma=cst.Comma(whitespace_after=cst.SimpleWhitespace(" ")),
),
cst.NameItem(cst.Name("b")),
)
),
"code": "nonlocal a, b",
},
# Whitespace rendering test
{
"node": cst.Nonlocal(
(
cst.NameItem(
cst.Name("a"),
comma=cst.Comma(
whitespace_before=cst.SimpleWhitespace(" "),
whitespace_after=cst.SimpleWhitespace(" "),
),
),
cst.NameItem(cst.Name("b")),
),
whitespace_after_nonlocal=cst.SimpleWhitespace(" "),
),
"code": "nonlocal a , b",
},
)
)
def test_valid(self, **kwargs: Any) -> None:
self.validate_node(
parser=lambda code: ensure_type(
parse_statement(code), cst.SimpleStatementLine
).body[0],
**kwargs,
)
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