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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 AssertConstructionTest(CSTNodeTest):
@data_provider(
(
# Simple assert
{
"node": cst.Assert(cst.Name("True")),
"code": "assert True",
"parser": None,
"expected_position": None,
},
# Assert with message
{
"node": cst.Assert(
cst.Name("True"), cst.SimpleString('"Value should be true"')
),
"code": 'assert True, "Value should be true"',
"parser": None,
"expected_position": None,
},
# Whitespace oddities test
{
"node": cst.Assert(
cst.Name("True", lpar=(cst.LeftParen(),), rpar=(cst.RightParen(),)),
whitespace_after_assert=cst.SimpleWhitespace(""),
),
"code": "assert(True)",
"parser": None,
"expected_position": CodeRange((1, 0), (1, 12)),
},
# Whitespace rendering test
{
"node": cst.Assert(
whitespace_after_assert=cst.SimpleWhitespace(" "),
test=cst.Name("True"),
comma=cst.Comma(
whitespace_before=cst.SimpleWhitespace(" "),
whitespace_after=cst.SimpleWhitespace(" "),
),
msg=cst.SimpleString('"Value should be true"'),
),
"code": 'assert True , "Value should be true"',
"parser": None,
"expected_position": CodeRange((1, 0), (1, 39)),
},
)
)
def test_valid(self, **kwargs: Any) -> None:
self.validate_node(**kwargs)
@data_provider(
(
# Validate whitespace handling
{
"get_node": (
lambda: cst.Assert(
cst.Name("True"),
whitespace_after_assert=cst.SimpleWhitespace(""),
)
),
"expected_re": "Must have at least one space after 'assert'",
},
# Validate comma handling
{
"get_node": (
lambda: cst.Assert(test=cst.Name("True"), comma=cst.Comma())
),
"expected_re": "Cannot have trailing comma after 'test'",
},
)
)
def test_invalid(self, **kwargs: Any) -> None:
self.assert_invalid(**kwargs)
def _assert_parser(code: str) -> cst.Assert:
return ensure_type(
ensure_type(parse_statement(code), cst.SimpleStatementLine).body[0], cst.Assert
)
class AssertParsingTest(CSTNodeTest):
@data_provider(
(
# Simple assert
{
"node": cst.Assert(cst.Name("True")),
"code": "assert True",
"parser": _assert_parser,
"expected_position": None,
},
# Assert with message
{
"node": cst.Assert(
cst.Name("True"),
cst.SimpleString('"Value should be true"'),
comma=cst.Comma(whitespace_after=cst.SimpleWhitespace(" ")),
),
"code": 'assert True, "Value should be true"',
"parser": _assert_parser,
"expected_position": None,
},
# Whitespace oddities test
{
"node": cst.Assert(
cst.Name("True", lpar=(cst.LeftParen(),), rpar=(cst.RightParen(),)),
whitespace_after_assert=cst.SimpleWhitespace(""),
),
"code": "assert(True)",
"parser": _assert_parser,
"expected_position": None,
},
# Whitespace rendering test
{
"node": cst.Assert(
whitespace_after_assert=cst.SimpleWhitespace(" "),
test=cst.Name("True"),
comma=cst.Comma(
whitespace_before=cst.SimpleWhitespace(" "),
whitespace_after=cst.SimpleWhitespace(" "),
),
msg=cst.SimpleString('"Value should be true"'),
),
"code": 'assert True , "Value should be true"',
"parser": _assert_parser,
"expected_position": None,
},
)
)
def test_valid(self, **kwargs: Any) -> None:
self.validate_node(**kwargs)
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