from test.test_support import verify, verbose, TestFailed, run_unittest import sys import dis import StringIO # Minimal tests for dis module import unittest def _f(a): print a return 1 dis_f = """\ %-4d 0 LOAD_FAST 0 (a) 3 PRINT_ITEM 4 PRINT_NEWLINE %-4d 5 LOAD_CONST 1 (1) 8 RETURN_VALUE """%(_f.func_code.co_firstlineno + 1, _f.func_code.co_firstlineno + 2) def bug708901(): for res in range(1, 10): pass dis_bug708901 = """\ %-4d 0 SETUP_LOOP 23 (to 26) 3 LOAD_GLOBAL 0 (range) 6 LOAD_CONST 1 (1) %-4d 9 LOAD_CONST 2 (10) 12 CALL_FUNCTION 2 15 GET_ITER >> 16 FOR_ITER 6 (to 25) 19 STORE_FAST 0 (res) %-4d 22 JUMP_ABSOLUTE 16 >> 25 POP_BLOCK >> 26 LOAD_CONST 0 (None) 29 RETURN_VALUE """%(bug708901.func_code.co_firstlineno + 1, bug708901.func_code.co_firstlineno + 2, bug708901.func_code.co_firstlineno + 3) def bug1333982(x=[]): assert 0, ([s for s in x] + 1) pass dis_bug1333982 = """\ %-4d 0 LOAD_CONST 1 (0) 3 JUMP_IF_TRUE 41 (to 47) 6 POP_TOP 7 LOAD_GLOBAL 0 (AssertionError) 10 BUILD_LIST 0 13 DUP_TOP 14 STORE_FAST 1 (_[1]) 17 LOAD_FAST 0 (x) 20 GET_ITER >> 21 FOR_ITER 13 (to 37) 24 STORE_FAST 2 (s) 27 LOAD_FAST 1 (_[1]) 30 LOAD_FAST 2 (s) 33 LIST_APPEND 34 JUMP_ABSOLUTE 21 >> 37 DELETE_FAST 1 (_[1]) %-4d 40 LOAD_CONST 2 (1) 43 BINARY_ADD 44 RAISE_VARARGS 2 >> 47 POP_TOP %-4d 48 LOAD_CONST 0 (None) 51 RETURN_VALUE """%(bug1333982.func_code.co_firstlineno + 1, bug1333982.func_code.co_firstlineno + 2, bug1333982.func_code.co_firstlineno + 3) class DisTests(unittest.TestCase): def do_disassembly_test(self, func, expected): s = StringIO.StringIO() save_stdout = sys.stdout sys.stdout = s dis.dis(func) sys.stdout = save_stdout got = s.getvalue() # Trim trailing blanks (if any). lines = got.split('\n') lines = [line.rstrip() for line in lines] expected = expected.split("\n") import difflib if expected != lines: self.fail( "events did not match expectation:\n" + "\n".join(difflib.ndiff(expected, lines))) def test_opmap(self): self.assertEqual(dis.opmap["STOP_CODE"], 0) self.assertEqual(dis.opmap["LOAD_CONST"] in dis.hasconst, True) self.assertEqual(dis.opmap["STORE_NAME"] in dis.hasname, True) def test_opname(self): self.assertEqual(dis.opname[dis.opmap["LOAD_FAST"]], "LOAD_FAST") def test_boundaries(self): self.assertEqual(dis.opmap["EXTENDED_ARG"], dis.EXTENDED_ARG) self.assertEqual(dis.opmap["STORE_NAME"], dis.HAVE_ARGUMENT) def test_dis(self): self.do_disassembly_test(_f, dis_f) def test_bug_708901(self): self.do_disassembly_test(bug708901, dis_bug708901) def test_bug_1333982(self): # This one is checking bytecodes generated for an `assert` statement, # so fails if the tests are run with -O. Skip this test then. if __debug__: self.do_disassembly_test(bug1333982, dis_bug1333982) def test_main(): run_unittest(DisTests) if __name__ == "__main__": test_main()