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import dis
from test.support import import_module
import unittest
_opcode = import_module("_opcode")
from _opcode import stack_effect
class OpcodeTests(unittest.TestCase):
def test_stack_effect(self):
self.assertEqual(stack_effect(dis.opmap['POP_TOP']), -1)
self.assertEqual(stack_effect(dis.opmap['DUP_TOP_TWO']), 2)
self.assertEqual(stack_effect(dis.opmap['BUILD_SLICE'], 0), -1)
self.assertEqual(stack_effect(dis.opmap['BUILD_SLICE'], 1), -1)
self.assertEqual(stack_effect(dis.opmap['BUILD_SLICE'], 3), -2)
self.assertRaises(ValueError, stack_effect, 30000)
self.assertRaises(ValueError, stack_effect, dis.opmap['BUILD_SLICE'])
self.assertRaises(ValueError, stack_effect, dis.opmap['POP_TOP'], 0)
# All defined opcodes
for name, code in dis.opmap.items():
with self.subTest(opname=name):
if code < dis.HAVE_ARGUMENT:
stack_effect(code)
self.assertRaises(ValueError, stack_effect, code, 0)
else:
stack_effect(code, 0)
self.assertRaises(ValueError, stack_effect, code)
# All not defined opcodes
for code in set(range(256)) - set(dis.opmap.values()):
with self.subTest(opcode=code):
self.assertRaises(ValueError, stack_effect, code)
self.assertRaises(ValueError, stack_effect, code, 0)
def test_stack_effect_jump(self):
JUMP_IF_TRUE_OR_POP = dis.opmap['JUMP_IF_TRUE_OR_POP']
self.assertEqual(stack_effect(JUMP_IF_TRUE_OR_POP, 0), 0)
self.assertEqual(stack_effect(JUMP_IF_TRUE_OR_POP, 0, jump=True), 0)
self.assertEqual(stack_effect(JUMP_IF_TRUE_OR_POP, 0, jump=False), -1)
FOR_ITER = dis.opmap['FOR_ITER']
self.assertEqual(stack_effect(FOR_ITER, 0), 1)
self.assertEqual(stack_effect(FOR_ITER, 0, jump=True), -1)
self.assertEqual(stack_effect(FOR_ITER, 0, jump=False), 1)
JUMP_FORWARD = dis.opmap['JUMP_FORWARD']
self.assertEqual(stack_effect(JUMP_FORWARD, 0), 0)
self.assertEqual(stack_effect(JUMP_FORWARD, 0, jump=True), 0)
self.assertEqual(stack_effect(JUMP_FORWARD, 0, jump=False), 0)
# All defined opcodes
has_jump = dis.hasjabs + dis.hasjrel
for name, code in dis.opmap.items():
with self.subTest(opname=name):
if code < dis.HAVE_ARGUMENT:
common = stack_effect(code)
jump = stack_effect(code, jump=True)
nojump = stack_effect(code, jump=False)
else:
common = stack_effect(code, 0)
jump = stack_effect(code, 0, jump=True)
nojump = stack_effect(code, 0, jump=False)
if code in has_jump:
self.assertEqual(common, max(jump, nojump))
else:
self.assertEqual(jump, common)
self.assertEqual(nojump, common)
if __name__ == "__main__":
unittest.main()
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