Content - 1075decc2704207203bb17737316adff4b770970 - 8b6539a/Lib/test/test__opcode.py

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v0.5.1

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https://github.com/python/cpython

09 December 2020, 11:06:31 UTC

Tip revision: 9561d7f501bfb9e579ed57536c4c9b4e5eea68a3 authored by Ned Deily on 30 January 2018, 23:48:26 UTC
Update NEWS, docs, and patchlevel for 3.7.0b1

Tip revision: 9561d7f

test__opcode.py

import dis
from test.support import import_module
import unittest

_opcode = import_module("_opcode")

class OpcodeTests(unittest.TestCase):

    def test_stack_effect(self):
        self.assertEqual(_opcode.stack_effect(dis.opmap['POP_TOP']), -1)
        self.assertEqual(_opcode.stack_effect(dis.opmap['DUP_TOP_TWO']), 2)
        self.assertEqual(_opcode.stack_effect(dis.opmap['BUILD_SLICE'], 0), -1)
        self.assertEqual(_opcode.stack_effect(dis.opmap['BUILD_SLICE'], 1), -1)
        self.assertEqual(_opcode.stack_effect(dis.opmap['BUILD_SLICE'], 3), -2)
        self.assertRaises(ValueError, _opcode.stack_effect, 30000)
        self.assertRaises(ValueError, _opcode.stack_effect, dis.opmap['BUILD_SLICE'])
        self.assertRaises(ValueError, _opcode.stack_effect, dis.opmap['POP_TOP'], 0)

if __name__ == "__main__":
    unittest.main()