def a():
	return b()

def b():
	return c()

def c():
	return [1,2,3]

def matches(frame, list):
	if list != []:
		assert list[0][0] == frame[0][0] \
			and list[0][1] == frame[0][1] \
		 	and matches(frame[1:], list[1:])

def test_frames():
	# Check that objframe() works as expected if it's present.

	try:
		from sizer.cpython import utils
		print "Frames of a() are", utils.objframe(a())
		assert matches(utils.objframe(a()),
			[("test_frame.py", 8),
			 ("test_frame.py", 5),
			 ("test_frame.py", 2),
			 ("test_frame.py", 22)])
	except ImportError:
		print "(failed, no objframe)"
		pass
	except AttributeError:
		print "(failed, no objframe)"
		pass