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from types import FunctionType
from RestrictedPython import PrintCollector
from RestrictedPython import compile_restricted_function
from RestrictedPython import safe_builtins
from RestrictedPython._compat import IS_PY310_OR_GREATER
def test_compile_restricted_function():
p = ''
body = """
print("Hello World!")
return printed
"""
name = "hello_world"
global_symbols = []
result = compile_restricted_function(
p, # parameters
body,
name,
filename='<string>',
globalize=global_symbols
)
assert result.code is not None
assert result.errors == ()
safe_globals = {
'__name__': 'script',
'_getattr_': getattr,
'_print_': PrintCollector,
'__builtins__': safe_builtins,
}
safe_locals = {}
exec(result.code, safe_globals, safe_locals)
hello_world = safe_locals['hello_world']
assert type(hello_world) is FunctionType
assert hello_world() == 'Hello World!\n'
def test_compile_restricted_function_func_wrapped():
p = ''
body = """
print("Hello World!")
return printed
"""
name = "hello_world"
global_symbols = []
result = compile_restricted_function(
p, # parameters
body,
name,
filename='<string>',
globalize=global_symbols
)
assert result.code is not None
assert result.errors == ()
safe_globals = {
'__name__': 'script',
'_getattr_': getattr,
'_print_': PrintCollector,
'__builtins__': safe_builtins,
}
func = FunctionType(result.code, safe_globals)
func()
assert 'hello_world' in safe_globals
hello_world = safe_globals['hello_world']
assert hello_world() == 'Hello World!\n'
def test_compile_restricted_function_with_arguments():
p = 'input1, input2'
body = """
print(input1 + input2)
return printed
"""
name = "hello_world"
global_symbols = []
result = compile_restricted_function(
p, # parameters
body,
name,
filename='<string>',
globalize=global_symbols
)
assert result.code is not None
assert result.errors == ()
safe_globals = {
'__name__': 'script',
'_getattr_': getattr,
'_print_': PrintCollector,
'__builtins__': safe_builtins,
}
safe_locals = {}
exec(result.code, safe_globals, safe_locals)
hello_world = safe_locals['hello_world']
assert type(hello_world) is FunctionType
assert hello_world('Hello ', 'World!') == 'Hello World!\n'
def test_compile_restricted_function_can_access_global_variables():
p = ''
body = """
print(input)
return printed
"""
name = "hello_world"
global_symbols = ['input']
result = compile_restricted_function(
p, # parameters
body,
name,
filename='<string>',
globalize=global_symbols
)
assert result.code is not None
assert result.errors == ()
safe_globals = {
'__name__': 'script',
'_getattr_': getattr,
'input': 'Hello World!',
'_print_': PrintCollector,
'__builtins__': safe_builtins,
}
safe_locals = {}
exec(result.code, safe_globals, safe_locals)
hello_world = safe_locals['hello_world']
assert type(hello_world) is FunctionType
assert hello_world() == 'Hello World!\n'
def test_compile_restricted_function_pretends_the_code_is_executed_in_a_global_scope(): # NOQA: E501
p = ''
body = """output = output + 'bar'"""
name = "hello_world"
global_symbols = ['output']
result = compile_restricted_function(
p, # parameters
body,
name,
filename='<string>',
globalize=global_symbols
)
assert result.code is not None
assert result.errors == ()
safe_globals = {
'__name__': 'script',
'output': 'foo',
'__builtins__': {},
}
safe_locals = {}
exec(result.code, safe_globals, safe_locals)
hello_world = safe_locals['hello_world']
assert type(hello_world) is FunctionType
hello_world()
assert safe_globals['output'] == 'foobar'
def test_compile_restricted_function_allows_invalid_python_identifiers_as_function_name(): # NOQA: E501
p = ''
body = """output = output + 'bar'"""
name = "<foo>.bar.__baz__"
global_symbols = ['output']
result = compile_restricted_function(
p, # parameters
body,
name,
filename='<string>',
globalize=global_symbols
)
assert result.code is not None
assert result.errors == ()
safe_globals = {
'__name__': 'script',
'output': 'foo',
'__builtins__': {},
}
safe_locals = {}
exec(result.code, safe_globals, safe_locals)
generated_function = tuple(safe_locals.values())[0]
assert type(generated_function) is FunctionType
generated_function()
assert safe_globals['output'] == 'foobar'
def test_compile_restricted_function_handle_SyntaxError():
p = ''
body = """a("""
name = "broken"
result = compile_restricted_function(
p, # parameters
body,
name,
)
assert result.code is None
if IS_PY310_OR_GREATER:
assert result.errors == (
"Line 1: SyntaxError: '(' was never closed at statement: 'a('",
)
else:
assert result.errors == (
"Line 1: SyntaxError: unexpected EOF while parsing at statement:"
" 'a('",
)
def test_compile_restricted_function_invalid_syntax():
p = ''
body = '1=1'
name = 'broken'
result = compile_restricted_function(
p, # parameters
body,
name,
)
assert result.code is None
assert len(result.errors) == 1
error_msg = result.errors[0]
if IS_PY310_OR_GREATER:
assert error_msg.startswith(
"Line 1: SyntaxError: cannot assign to literal here. Maybe "
)
else:
assert error_msg.startswith(
"Line 1: SyntaxError: cannot assign to literal at statement:"
)
|
