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