def test_toplevel_frame_has_no_parent():
frame = inspect.currentframe()
while frame.f_back is not None:
frame = frame.f_back
frame = CallFrame.from_frame(frame)
assert frame.parent is None
def test_attrs():
frame1 = inspect.currentframe()
frame2 = CallFrame.from_frame(frame1)
assert frame2.parent == frame1.f_back
assert frame2.locals is frame1.f_locals
assert frame2.globals is frame1.f_globals
assert frame2.builtins is frame1.f_builtins
assert frame2.code_object is frame1.f_code
def test_equality(orig_frame):
frame = CallFrame.from_frame(orig_frame)
assert frame == orig_frame