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# Tests from Fabio Zadrozny
class AppTestLocals2Fast:
"""
Test setting locals in one function from another function
using several approaches.
"""
def setup_class(cls):
cls.w_save_locals = cls.space.appexec([], """():
import sys
if '__pypy__' in sys.builtin_module_names:
import __pypy__
save_locals = __pypy__.locals_to_fast
else:
# CPython version
import ctypes
@staticmethod
def save_locals(frame):
ctypes.pythonapi.PyFrame_LocalsToFast(
ctypes.py_object(frame), ctypes.c_int(0))
return save_locals
""")
def test_set_locals_using_save_locals(self):
import sys
def use_save_locals(name, value):
frame = sys._getframe().f_back
locals_dict = frame.f_locals
locals_dict[name] = value
self.save_locals(frame)
def test_method(fn):
x = 1
# The method 'fn' should attempt to set x = 2 in the current frame.
fn('x', 2)
return x
x = test_method(use_save_locals)
assert x == 2
def test_frame_simple_change(self):
import sys
frame = sys._getframe()
a = 20
frame.f_locals['a'] = 50
self.save_locals(frame)
assert a == 50
def test_frame_co_freevars(self):
import sys
outer_var = 20
def func():
frame = sys._getframe()
frame.f_locals['outer_var'] = 50
self.save_locals(frame)
assert outer_var == 50
func()
def test_frame_co_cellvars(self):
import sys
def check_co_vars(a):
frame = sys._getframe()
def function2():
print(a)
assert 'a' in frame.f_code.co_cellvars
frame = sys._getframe()
frame.f_locals['a'] = 50
self.save_locals(frame)
assert a == 50
check_co_vars(1)
def test_frame_change_in_inner_frame(self):
import sys
def change(f):
assert f is not sys._getframe()
f.f_locals['a'] = 50
self.save_locals(f)
frame = sys._getframe()
a = 20
change(frame)
assert a == 50
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