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Fix nesting count - with tests. Resolve #2926

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This commit is contained in:
Griatch 2022-10-31 20:38:12 +01:00
parent bd297876ca
commit a2289c46f8
2 changed files with 24 additions and 12 deletions
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2
evennia/utils/funcparser.py
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@ -352,7 +352,7 @@ class FuncParser:
if curr_func:
# we are starting a nested funcdef
if len(callstack) > _MAX_NESTING:
if len(callstack) >= _MAX_NESTING - 1:
# stack full - ignore this function
if raise_errors:
raise ParsingError(

34
evennia/utils/tests/test_funcparser.py
View File

@ -252,25 +252,37 @@ class TestFuncParser(TestCase):
with self.assertRaises(funcparser.ParsingError):
self.parser.parse(unparseable, raise_errors=True)
@patch("evennia.utils.funcparser._MAX_NESTING", 2)
def test_parse_max_nesting(self):
@parameterized.expand(
[
# max_nest, cause error for 4 nested funcs?
(0, False),
(1, False),
(2, False),
(3, False),
(4, True),
(5, True),
(6, True),
]
)
def test_parse_max_nesting(self, max_nest, ok):
"""
Make sure it is an error if the max nesting value is reached.
Make sure it is an error if the max nesting value is reached. We test
four nested functions against differnt MAX_NESTING values.
TODO: Does this make sense? When it sees the first function, len(callstack)
is 0. It doesn't raise until the stack length is greater than the
_MAX_NESTING value, which means you can nest 4 values with a value of
2, as demonstrated by this test.
"""
string = "$add(1, $add(1, $add(1, $toint(42))))"
ret = self.parser.parse(string)
string = "$add(1, $add(1, $add(1, $eval(42))))"
# TODO: Does this return value actually make sense?
# It removed the spaces from the calls.
self.assertEqual("$add(1,$add(1,$add(1,$toint(42))))", ret)
with self.assertRaises(funcparser.ParsingError):
self.parser.parse(string, raise_errors=True)
with patch("evennia.utils.funcparser._MAX_NESTING", max_nest):
if ok:
ret = self.parser.parse(string, raise_errors=True)
self.assertEqual(ret, "45")
else:
with self.assertRaises(funcparser.ParsingError):
self.parser.parse(string, raise_errors=True)
def test_parse_underlying_exception(self):
string = "test $add(1, 1) $raise()"