def test_eq(self):
# compare codes with multiple blocks and labels,
# Code.__eq__() renumbers labels to get equal labels
source = "x = 1 if test else 2"
code1 = disassemble(source)
code2 = disassemble(source)
self.assertEqual(code1, code2)
# Type mismatch
self.assertFalse(code1 == 1)
# argnames mismatch
cfg = ControlFlowGraph()
cfg.argnames = 10
self.assertFalse(code1 == cfg)
# instr mismatch
cfg = ControlFlowGraph()
cfg.argnames = code1.argnames
self.assertFalse(code1 == cfg)
def test_to_code(self):
# test resolution of jump labels
bytecode = ControlFlowGraph()
bytecode.first_lineno = 3
bytecode.argcount = 3
if sys.version_info > (3, 8):
bytecode.posonlyargcount = 0
bytecode.kwonlyargcount = 2
bytecode.name = "func"
bytecode.filename = "hello.py"
bytecode.flags = 0x43
bytecode.argnames = ("arg", "arg2", "arg3", "kwonly", "kwonly2")
bytecode.docstring = None
block0 = bytecode[0]
block1 = bytecode.add_block()
block2 = bytecode.add_block()
block0.extend([
Instr("LOAD_FAST", "x", lineno=4),
Instr("POP_JUMP_IF_FALSE", block2, lineno=4),
])
block1.extend([
Instr("LOAD_FAST", "arg", lineno=5),
Instr("STORE_FAST", "x", lineno=5)
])
block2.extend([
Instr("LOAD_CONST", 3, lineno=6),
Instr("STORE_FAST", "x", lineno=6),
Instr("LOAD_FAST", "x", lineno=7),
Instr("RETURN_VALUE", lineno=7),
])
if WORDCODE:
expected = (b"|\x05"
b"r\x08"
b"|\x00"
b"}\x05"
b"d\x01"
b"}\x05"
b"|\x05"
b"S\x00")
else:
expected = (b"|\x05\x00"
b"r\x0c\x00"
b"|\x00\x00"
b"}\x05\x00"
b"d\x01\x00"
b"}\x05\x00"
b"|\x05\x00"
b"S")
code = bytecode.to_code()
self.assertEqual(code.co_consts, (None, 3))
self.assertEqual(code.co_argcount, 3)
if sys.version_info > (3, 8):
self.assertEqual(code.co_posonlyargcount, 0)
self.assertEqual(code.co_kwonlyargcount, 2)
self.assertEqual(code.co_nlocals, 6)
self.assertEqual(code.co_stacksize, 1)
# FIXME: don't use hardcoded constants
self.assertEqual(code.co_flags, 0x43)
self.assertEqual(code.co_code, expected)
self.assertEqual(code.co_names, ())
self.assertEqual(code.co_varnames,
("arg", "arg2", "arg3", "kwonly", "kwonly2", "x"))
self.assertEqual(code.co_filename, "hello.py")
self.assertEqual(code.co_name, "func")
self.assertEqual(code.co_firstlineno, 3)
# verify stacksize argument is honored
explicit_stacksize = code.co_stacksize + 42
code = bytecode.to_code(stacksize=explicit_stacksize)
self.assertEqual(code.co_stacksize, explicit_stacksize)