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from RestrictedPython import compile_restricted_exec
from tests.helper import restricted_exec
def test_RestrictingNodeTransformer__visit_Call__1():
"""It compiles a function call successfully and returns the used name."""
result = compile_restricted_exec('a = max([1, 2, 3])')
assert result.errors == ()
loc = {}
exec(result.code, {}, loc)
assert loc['a'] == 3
assert result.used_names == {'max': True}
# def f(a, b, c): pass
# f(*two_element_sequence, **dict_with_key_c)
#
# makes the elements of two_element_sequence
# visible to f via its 'a' and 'b' arguments,
# and the dict_with_key_c['c'] value visible via its 'c' argument.
# It is a devious way to extract values without going through security checks.
FUNCTIONC_CALLS = """
star = (3, 4)
kwargs = {'x': 5, 'y': 6}
def positional_args():
return foo(1, 2)
def star_args():
return foo(*star)
def positional_and_star_args():
return foo(1, 2, *star)
def kw_args():
return foo(**kwargs)
def star_and_kw():
return foo(*star, **kwargs)
def positional_and_star_and_kw_args():
return foo(1, *star, **kwargs)
def positional_and_star_and_keyword_and_kw_args():
return foo(1, 2, *star, r=9, **kwargs)
"""
def test_RestrictingNodeTransformer__visit_Call__2(mocker):
_apply_ = mocker.stub()
_apply_.side_effect = lambda func, *args, **kwargs: func(*args, **kwargs)
glb = {
'_apply_': _apply_,
'foo': lambda *args, **kwargs: (args, kwargs)
}
restricted_exec(FUNCTIONC_CALLS, glb)
ret = glb['positional_args']()
assert ((1, 2), {}) == ret
assert _apply_.called is False
_apply_.reset_mock()
ret = glb['star_args']()
ref = ((3, 4), {})
assert ref == ret
_apply_.assert_called_once_with(glb['foo'], *ref[0])
_apply_.reset_mock()
ret = glb['positional_and_star_args']()
ref = ((1, 2, 3, 4), {})
assert ref == ret
_apply_.assert_called_once_with(glb['foo'], *ref[0])
_apply_.reset_mock()
ret = glb['kw_args']()
ref = ((), {'x': 5, 'y': 6})
assert ref == ret
_apply_.assert_called_once_with(glb['foo'], **ref[1])
_apply_.reset_mock()
ret = glb['star_and_kw']()
ref = ((3, 4), {'x': 5, 'y': 6})
assert ref == ret
_apply_.assert_called_once_with(glb['foo'], *ref[0], **ref[1])
_apply_.reset_mock()
ret = glb['positional_and_star_and_kw_args']()
ref = ((1, 3, 4), {'x': 5, 'y': 6})
assert ref == ret
_apply_.assert_called_once_with(glb['foo'], *ref[0], **ref[1])
_apply_.reset_mock()
ret = glb['positional_and_star_and_keyword_and_kw_args']()
ref = ((1, 2, 3, 4), {'x': 5, 'y': 6, 'r': 9})
assert ref == ret
_apply_.assert_called_once_with(glb['foo'], *ref[0], **ref[1])
_apply_.reset_mock()
def test_visit_Call__private_function():
"""Calling private functions is forbidden."""
result = compile_restricted_exec('__init__(1)')
assert result.errors == (
'Line 1: "__init__" is an invalid variable name because it starts with "_"', # NOQA: E501
)
def test_visit_Call__private_method():
"""Calling private methods is forbidden."""
result = compile_restricted_exec('Int.__init__(1)')
assert result.errors == (
'Line 1: "__init__" is an invalid attribute name because it starts with "_".', # NOQA: E501
)
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