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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
from libcst.metadata import CodeRange
from libcst.testing.utils import data_provider
class ForTest(CSTNodeTest):
@data_provider(
(
# Simple for block
{
"node": cst.For(
cst.Name("target"),
cst.Call(cst.Name("iter")),
cst.SimpleStatementSuite((cst.Pass(),)),
),
"code": "for target in iter(): pass\n",
"parser": parse_statement,
},
# Simple async for block
{
"node": cst.For(
cst.Name("target"),
cst.Call(cst.Name("iter")),
cst.SimpleStatementSuite((cst.Pass(),)),
asynchronous=cst.Asynchronous(),
),
"code": "async for target in iter(): pass\n",
"parser": lambda code: parse_statement(
code, config=PartialParserConfig(python_version="3.7")
),
},
# Python 3.6 async for block
{
"node": cst.FunctionDef(
cst.Name("foo"),
cst.Parameters(),
cst.IndentedBlock(
(
cst.For(
cst.Name("target"),
cst.Call(cst.Name("iter")),
cst.SimpleStatementSuite((cst.Pass(),)),
asynchronous=cst.Asynchronous(),
),
)
),
asynchronous=cst.Asynchronous(),
),
"code": "async def foo():\n async for target in iter(): pass\n",
"parser": lambda code: parse_statement(
code, config=PartialParserConfig(python_version="3.6")
),
},
# For block with else
{
"node": cst.For(
cst.Name("target"),
cst.Call(cst.Name("iter")),
cst.SimpleStatementSuite((cst.Pass(),)),
cst.Else(cst.SimpleStatementSuite((cst.Pass(),))),
),
"code": "for target in iter(): pass\nelse: pass\n",
"parser": parse_statement,
},
# indentation
{
"node": DummyIndentedBlock(
" ",
cst.For(
cst.Name("target"),
cst.Call(cst.Name("iter")),
cst.SimpleStatementSuite((cst.Pass(),)),
),
),
"code": " for target in iter(): pass\n",
"parser": None,
},
# for an indented body
{
"node": DummyIndentedBlock(
" ",
cst.For(
cst.Name("target"),
cst.Call(cst.Name("iter")),
cst.IndentedBlock((cst.SimpleStatementLine((cst.Pass(),)),)),
),
),
"code": " for target in iter():\n pass\n",
"parser": None,
"expected_position": CodeRange((1, 4), (2, 12)),
},
# leading_lines
{
"node": cst.For(
cst.Name("target"),
cst.Call(cst.Name("iter")),
cst.IndentedBlock((cst.SimpleStatementLine((cst.Pass(),)),)),
cst.Else(
cst.IndentedBlock((cst.SimpleStatementLine((cst.Pass(),)),)),
leading_lines=(
cst.EmptyLine(comment=cst.Comment("# else comment")),
),
),
leading_lines=(
cst.EmptyLine(comment=cst.Comment("# leading comment")),
),
),
"code": "# leading comment\nfor target in iter():\n pass\n# else comment\nelse:\n pass\n",
"parser": None,
"expected_position": CodeRange((2, 0), (6, 8)),
},
# Weird spacing rules
{
"node": cst.For(
cst.Name(
"target", lpar=(cst.LeftParen(),), rpar=(cst.RightParen(),)
),
cst.Call(
cst.Name("iter"),
lpar=(cst.LeftParen(),),
rpar=(cst.RightParen(),),
),
cst.SimpleStatementSuite((cst.Pass(),)),
whitespace_after_for=cst.SimpleWhitespace(""),
whitespace_before_in=cst.SimpleWhitespace(""),
whitespace_after_in=cst.SimpleWhitespace(""),
),
"code": "for(target)in(iter()): pass\n",
"parser": parse_statement,
"expected_position": CodeRange((1, 0), (1, 27)),
},
# Whitespace
{
"node": cst.For(
cst.Name("target"),
cst.Call(cst.Name("iter")),
cst.SimpleStatementSuite((cst.Pass(),)),
whitespace_after_for=cst.SimpleWhitespace(" "),
whitespace_before_in=cst.SimpleWhitespace(" "),
whitespace_after_in=cst.SimpleWhitespace(" "),
whitespace_before_colon=cst.SimpleWhitespace(" "),
),
"code": "for target in iter() : pass\n",
"parser": parse_statement,
"expected_position": CodeRange((1, 0), (1, 31)),
},
)
)
def test_valid(self, **kwargs: Any) -> None:
self.validate_node(**kwargs)
@data_provider(
(
{
"get_node": lambda: cst.For(
cst.Name("target"),
cst.Call(cst.Name("iter")),
cst.SimpleStatementSuite((cst.Pass(),)),
whitespace_after_for=cst.SimpleWhitespace(""),
),
"expected_re": "Must have at least one space after 'for' keyword",
},
{
"get_node": lambda: cst.For(
cst.Name("target"),
cst.Call(cst.Name("iter")),
cst.SimpleStatementSuite((cst.Pass(),)),
whitespace_before_in=cst.SimpleWhitespace(""),
),
"expected_re": "Must have at least one space before 'in' keyword",
},
{
"get_node": lambda: cst.For(
cst.Name("target"),
cst.Call(cst.Name("iter")),
cst.SimpleStatementSuite((cst.Pass(),)),
whitespace_after_in=cst.SimpleWhitespace(""),
),
"expected_re": "Must have at least one space after 'in' keyword",
},
)
)
def test_invalid(self, **kwargs: Any) -> None:
self.assert_invalid(**kwargs)
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