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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_expression
from libcst._nodes.tests.base import CSTNodeTest
from libcst.metadata import CodeRange
from libcst.testing.utils import data_provider
class AttributeTest(CSTNodeTest):
@data_provider(
(
# Simple attribute access
{
"node": cst.Attribute(cst.Name("foo"), cst.Name("bar")),
"code": "foo.bar",
"parser": parse_expression,
"expected_position": CodeRange((1, 0), (1, 7)),
},
# Parenthesized attribute access
{
"node": cst.Attribute(
lpar=(cst.LeftParen(),),
value=cst.Name("foo"),
attr=cst.Name("bar"),
rpar=(cst.RightParen(),),
),
"code": "(foo.bar)",
"parser": parse_expression,
"expected_position": CodeRange((1, 1), (1, 8)),
},
# Make sure that spacing works
{
"node": cst.Attribute(
lpar=(cst.LeftParen(whitespace_after=cst.SimpleWhitespace(" ")),),
value=cst.Name("foo"),
dot=cst.Dot(
whitespace_before=cst.SimpleWhitespace(" "),
whitespace_after=cst.SimpleWhitespace(" "),
),
attr=cst.Name("bar"),
rpar=(cst.RightParen(whitespace_before=cst.SimpleWhitespace(" ")),),
),
"code": "( foo . bar )",
"parser": parse_expression,
"expected_position": CodeRange((1, 2), (1, 11)),
},
)
)
def test_valid(self, **kwargs: Any) -> None:
self.validate_node(**kwargs)
@data_provider(
(
{
"get_node": (
lambda: cst.Attribute(
cst.Name("foo"), cst.Name("bar"), lpar=(cst.LeftParen(),)
)
),
"expected_re": "left paren without right paren",
},
{
"get_node": (
lambda: cst.Attribute(
cst.Name("foo"), cst.Name("bar"), rpar=(cst.RightParen(),)
)
),
"expected_re": "right paren without left paren",
},
)
)
def test_invalid(self, **kwargs: Any) -> None:
self.assert_invalid(**kwargs)
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