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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 RaiseConstructionTest(CSTNodeTest):
@data_provider(
(
# Simple raise
{"node": cst.Raise(), "code": "raise"},
# Raise exception
{
"node": cst.Raise(cst.Call(cst.Name("Exception"))),
"code": "raise Exception()",
"expected_position": CodeRange((1, 0), (1, 17)),
},
# Raise exception from cause
{
"node": cst.Raise(
cst.Call(cst.Name("Exception")), cst.From(cst.Name("cause"))
),
"code": "raise Exception() from cause",
},
# Whitespace oddities test
{
"node": cst.Raise(
cst.Call(
cst.Name("Exception"),
lpar=(cst.LeftParen(),),
rpar=(cst.RightParen(),),
),
cst.From(
cst.Name(
"cause", lpar=(cst.LeftParen(),), rpar=(cst.RightParen(),)
),
whitespace_before_from=cst.SimpleWhitespace(""),
whitespace_after_from=cst.SimpleWhitespace(""),
),
whitespace_after_raise=cst.SimpleWhitespace(""),
),
"code": "raise(Exception())from(cause)",
"expected_position": CodeRange((1, 0), (1, 29)),
},
{
"node": cst.Raise(
cst.Call(cst.Name("Exception")),
cst.From(
cst.Name("cause"),
whitespace_before_from=cst.SimpleWhitespace(""),
),
),
"code": "raise Exception()from cause",
"expected_position": CodeRange((1, 0), (1, 27)),
},
# Whitespace rendering test
{
"node": cst.Raise(
exc=cst.Call(cst.Name("Exception")),
cause=cst.From(
cst.Name("cause"),
whitespace_before_from=cst.SimpleWhitespace(" "),
whitespace_after_from=cst.SimpleWhitespace(" "),
),
whitespace_after_raise=cst.SimpleWhitespace(" "),
),
"code": "raise Exception() from cause",
"expected_position": CodeRange((1, 0), (1, 31)),
},
)
)
def test_valid(self, **kwargs: Any) -> None:
self.validate_node(**kwargs)
@data_provider(
(
# Validate construction
{
"get_node": lambda: cst.Raise(cause=cst.From(cst.Name("cause"))),
"expected_re": "Must have an 'exc' when specifying 'clause'. on Raise",
},
# Validate whitespace handling
{
"get_node": lambda: cst.Raise(
cst.Call(cst.Name("Exception")),
whitespace_after_raise=cst.SimpleWhitespace(""),
),
"expected_re": "Must have at least one space after 'raise'",
},
{
"get_node": lambda: cst.Raise(
cst.Name("exc"),
cst.From(
cst.Name("cause"),
whitespace_before_from=cst.SimpleWhitespace(""),
),
),
"expected_re": "Must have at least one space before 'from'",
},
{
"get_node": lambda: cst.Raise(
cst.Name("exc"),
cst.From(
cst.Name("cause"),
whitespace_after_from=cst.SimpleWhitespace(""),
),
),
"expected_re": "Must have at least one space after 'from'",
},
)
)
def test_invalid(self, **kwargs: Any) -> None:
self.assert_invalid(**kwargs)
class RaiseParsingTest(CSTNodeTest):
@data_provider(
(
# Simple raise
{"node": cst.Raise(), "code": "raise"},
# Raise exception
{
"node": cst.Raise(
cst.Call(cst.Name("Exception")),
whitespace_after_raise=cst.SimpleWhitespace(" "),
),
"code": "raise Exception()",
},
# Raise exception from cause
{
"node": cst.Raise(
cst.Call(cst.Name("Exception")),
cst.From(
cst.Name("cause"),
whitespace_before_from=cst.SimpleWhitespace(" "),
whitespace_after_from=cst.SimpleWhitespace(" "),
),
whitespace_after_raise=cst.SimpleWhitespace(" "),
),
"code": "raise Exception() from cause",
},
# Whitespace oddities test
{
"node": cst.Raise(
cst.Call(
cst.Name("Exception"),
lpar=(cst.LeftParen(),),
rpar=(cst.RightParen(),),
),
cst.From(
cst.Name(
"cause", lpar=(cst.LeftParen(),), rpar=(cst.RightParen(),)
),
whitespace_before_from=cst.SimpleWhitespace(""),
whitespace_after_from=cst.SimpleWhitespace(""),
),
whitespace_after_raise=cst.SimpleWhitespace(""),
),
"code": "raise(Exception())from(cause)",
},
{
"node": cst.Raise(
cst.Call(cst.Name("Exception")),
cst.From(
cst.Name("cause"),
whitespace_before_from=cst.SimpleWhitespace(""),
whitespace_after_from=cst.SimpleWhitespace(" "),
),
whitespace_after_raise=cst.SimpleWhitespace(" "),
),
"code": "raise Exception()from cause",
},
# Whitespace rendering test
{
"node": cst.Raise(
exc=cst.Call(cst.Name("Exception")),
cause=cst.From(
cst.Name("cause"),
whitespace_before_from=cst.SimpleWhitespace(" "),
whitespace_after_from=cst.SimpleWhitespace(" "),
),
whitespace_after_raise=cst.SimpleWhitespace(" "),
),
"code": "raise Exception() from cause",
},
)
)
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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