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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, PartialParserConfig
from libcst._nodes.tests.base import CSTNodeTest, DummyIndentedBlock, parse_statement_as
from libcst.metadata import CodeRange
from libcst.testing.utils import data_provider
class WithTest(CSTNodeTest):
maxDiff: int = 2000
@data_provider(
(
# Simple with block
{
"node": cst.With(
(cst.WithItem(cst.Call(cst.Name("context_mgr"))),),
cst.SimpleStatementSuite((cst.Pass(),)),
),
"code": "with context_mgr(): pass\n",
"parser": parse_statement,
"expected_position": CodeRange((1, 0), (1, 24)),
},
# Simple async with block
{
"node": cst.With(
(cst.WithItem(cst.Call(cst.Name("context_mgr"))),),
cst.SimpleStatementSuite((cst.Pass(),)),
asynchronous=cst.Asynchronous(),
),
"code": "async with context_mgr(): pass\n",
"parser": lambda code: parse_statement(
code, config=PartialParserConfig(python_version="3.7")
),
},
# Python 3.6 async with block
{
"node": cst.FunctionDef(
cst.Name("foo"),
cst.Parameters(),
cst.IndentedBlock(
(
cst.With(
(cst.WithItem(cst.Call(cst.Name("context_mgr"))),),
cst.SimpleStatementSuite((cst.Pass(),)),
asynchronous=cst.Asynchronous(),
),
)
),
asynchronous=cst.Asynchronous(),
),
"code": "async def foo():\n async with context_mgr(): pass\n",
"parser": lambda code: parse_statement(
code, config=PartialParserConfig(python_version="3.6")
),
},
# Multiple context managers
{
"node": cst.With(
(
cst.WithItem(cst.Call(cst.Name("foo"))),
cst.WithItem(cst.Call(cst.Name("bar"))),
),
cst.SimpleStatementSuite((cst.Pass(),)),
),
"code": "with foo(), bar(): pass\n",
"parser": None,
},
{
"node": cst.With(
(
cst.WithItem(
cst.Call(cst.Name("foo")),
comma=cst.Comma(whitespace_after=cst.SimpleWhitespace(" ")),
),
cst.WithItem(cst.Call(cst.Name("bar"))),
),
cst.SimpleStatementSuite((cst.Pass(),)),
),
"code": "with foo(), bar(): pass\n",
"parser": parse_statement,
},
# With block containing variable for context manager.
{
"node": cst.With(
(
cst.WithItem(
cst.Call(cst.Name("context_mgr")),
cst.AsName(cst.Name("ctx")),
),
),
cst.SimpleStatementSuite((cst.Pass(),)),
),
"code": "with context_mgr() as ctx: pass\n",
"parser": parse_statement,
},
{
"node": cst.With(
(
cst.WithItem(
cst.Call(cst.Name("context_mgr")),
cst.AsName(
cst.Tuple(()),
whitespace_after_as=cst.SimpleWhitespace(""),
whitespace_before_as=cst.SimpleWhitespace(""),
),
),
),
cst.SimpleStatementSuite((cst.Pass(),)),
),
"code": "with context_mgr()as(): pass\n",
"parser": parse_statement,
},
# indentation
{
"node": DummyIndentedBlock(
" ",
cst.With(
(cst.WithItem(cst.Call(cst.Name("context_mgr"))),),
cst.SimpleStatementSuite((cst.Pass(),)),
),
),
"code": " with context_mgr(): pass\n",
"parser": None,
"expected_position": CodeRange((1, 4), (1, 28)),
},
# with an indented body
{
"node": DummyIndentedBlock(
" ",
cst.With(
(cst.WithItem(cst.Call(cst.Name("context_mgr"))),),
cst.IndentedBlock((cst.SimpleStatementLine((cst.Pass(),)),)),
),
),
"code": " with context_mgr():\n pass\n",
"parser": None,
"expected_position": CodeRange((1, 4), (2, 12)),
},
# leading_lines
{
"node": cst.With(
(cst.WithItem(cst.Call(cst.Name("context_mgr"))),),
cst.SimpleStatementSuite((cst.Pass(),)),
leading_lines=(
cst.EmptyLine(comment=cst.Comment("# leading comment")),
),
),
"code": "# leading comment\nwith context_mgr(): pass\n",
"parser": parse_statement,
"expected_position": CodeRange((2, 0), (2, 24)),
},
# Whitespace
{
"node": cst.With(
(
cst.WithItem(
cst.Call(cst.Name("context_mgr")),
cst.AsName(
cst.Name("ctx"),
whitespace_before_as=cst.SimpleWhitespace(" "),
whitespace_after_as=cst.SimpleWhitespace(" "),
),
),
),
cst.SimpleStatementSuite((cst.Pass(),)),
whitespace_after_with=cst.SimpleWhitespace(" "),
whitespace_before_colon=cst.SimpleWhitespace(" "),
),
"code": "with context_mgr() as ctx : pass\n",
"parser": parse_statement,
"expected_position": CodeRange((1, 0), (1, 36)),
},
# Weird spacing rules, that parse differently depending on whether
# we are using a grammar that included parenthesized with statements.
{
"node": cst.With(
(
cst.WithItem(
cst.Call(
cst.Name("context_mgr"),
lpar=(),
rpar=(),
)
),
),
cst.SimpleStatementSuite((cst.Pass(),)),
lpar=(cst.LeftParen()),
rpar=(cst.RightParen()),
whitespace_after_with=cst.SimpleWhitespace(""),
),
"code": "with(context_mgr()): pass\n",
"parser": parse_statement,
"expected_position": CodeRange((1, 0), (1, 25)),
},
# Multi-line parenthesized with.
{
"node": cst.With(
(
cst.WithItem(
cst.Call(cst.Name("foo")),
comma=cst.Comma(
whitespace_after=cst.ParenthesizedWhitespace(
first_line=cst.TrailingWhitespace(
whitespace=cst.SimpleWhitespace(
value="",
),
comment=None,
newline=cst.Newline(
value=None,
),
),
empty_lines=[],
indent=True,
last_line=cst.SimpleWhitespace(
value=" ",
),
)
),
),
cst.WithItem(cst.Call(cst.Name("bar")), comma=cst.Comma()),
),
cst.SimpleStatementSuite((cst.Pass(),)),
lpar=cst.LeftParen(whitespace_after=cst.SimpleWhitespace(" ")),
rpar=cst.RightParen(whitespace_before=cst.SimpleWhitespace(" ")),
),
"code": ("with ( foo(),\n" " bar(), ): pass\n"), # noqa
"parser": parse_statement,
"expected_position": CodeRange((1, 0), (2, 21)),
},
)
)
def test_valid(self, **kwargs: Any) -> None:
self.validate_node(**kwargs)
@data_provider(
(
{
"get_node": lambda: cst.With(
(), cst.IndentedBlock((cst.SimpleStatementLine((cst.Pass(),)),))
),
"expected_re": "A With statement must have at least one WithItem",
},
{
"get_node": lambda: cst.With(
(
cst.WithItem(
cst.Call(cst.Name("foo")),
comma=cst.Comma(whitespace_after=cst.SimpleWhitespace(" ")),
),
),
cst.IndentedBlock((cst.SimpleStatementLine((cst.Pass(),)),)),
),
"expected_re": "The last WithItem in an unparenthesized With cannot "
+ "have a trailing comma.",
},
{
"get_node": lambda: cst.With(
(cst.WithItem(cst.Call(cst.Name("context_mgr"))),),
cst.SimpleStatementSuite((cst.Pass(),)),
whitespace_after_with=cst.SimpleWhitespace(""),
),
"expected_re": "Must have at least one space after with keyword",
},
{
"get_node": lambda: cst.With(
(cst.WithItem(cst.Call(cst.Name("context_mgr"))),),
cst.SimpleStatementSuite((cst.Pass(),)),
whitespace_after_with=cst.SimpleWhitespace(""),
lpar=cst.LeftParen(),
),
"expected_re": "Do not mix concrete LeftParen/RightParen with "
+ "MaybeSentinel",
},
{
"get_node": lambda: cst.With(
(cst.WithItem(cst.Call(cst.Name("context_mgr"))),),
cst.SimpleStatementSuite((cst.Pass(),)),
whitespace_after_with=cst.SimpleWhitespace(""),
rpar=cst.RightParen(),
),
"expected_re": "Do not mix concrete LeftParen/RightParen with "
+ "MaybeSentinel",
},
)
)
def test_invalid(self, **kwargs: Any) -> None:
self.assert_invalid(**kwargs)
@data_provider(
(
{
"code": "with a, b: pass",
"parser": parse_statement_as(python_version="3.1"),
"expect_success": True,
},
{
"code": "with a, b: pass",
"parser": parse_statement_as(python_version="3.0"),
"expect_success": False,
},
)
)
def test_versions(self, **kwargs: Any) -> None:
if not kwargs.get("expect_success", True):
self.skipTest("parse errors are disabled for native parser")
self.assert_parses(**kwargs)
def test_adding_parens(self) -> None:
node = cst.With(
(
cst.WithItem(
cst.Call(cst.Name("foo")),
comma=cst.Comma(
whitespace_after=cst.ParenthesizedWhitespace(),
),
),
cst.WithItem(cst.Call(cst.Name("bar")), comma=cst.Comma()),
),
cst.SimpleStatementSuite((cst.Pass(),)),
lpar=cst.LeftParen(whitespace_after=cst.SimpleWhitespace(" ")),
rpar=cst.RightParen(whitespace_before=cst.SimpleWhitespace(" ")),
)
module = cst.Module([])
self.assertEqual(
module.code_for_node(node), ("with ( foo(),\n" "bar(), ): pass\n") # noqa
)
|
