def leave_Assert(self, _, updated_node): # noqa
test_code = cst.Module("").code_for_node(updated_node.test)
try:
test_literal = literal_eval(test_code)
except Exception:
return updated_node
if test_literal:
return cst.RemovalSentinel.REMOVE
if updated_node.msg is None:
return cst.Raise(cst.Name("AssertionError"))
return cst.Raise(
cst.Call(cst.Name("AssertionError"),
args=[cst.Arg(updated_node.msg)]))
def _get_assert_replacement(self, node: cst.Assert):
message = node.msg or str(cst.Module(body=[node]).code)
return cst.If(
test=cst.UnaryOperation(
operator=cst.Not(),
expression=node.test, # Todo: parenthesize?
),
body=cst.IndentedBlock(body=[
cst.SimpleStatementLine(body=[
cst.Raise(exc=cst.Call(
func=cst.Name(value="AssertionError", ),
args=[
cst.Arg(value=cst.SimpleString(value=repr(message),
), ),
],
), ),
]),
], ),
)
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,
)