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156 lines
4.7 KiB
Python
156 lines
4.7 KiB
Python
# Minimal tests for dis module
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from test.test_support import verbose, run_unittest
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import unittest
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import sys
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import dis
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import StringIO
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def _f(a):
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print a
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return 1
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dis_f = """\
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%-4d 0 LOAD_FAST 0 (a)
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3 PRINT_ITEM
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4 PRINT_NEWLINE
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%-4d 5 LOAD_CONST 1 (1)
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8 RETURN_VALUE
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"""%(_f.func_code.co_firstlineno + 1,
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_f.func_code.co_firstlineno + 2)
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def bug708901():
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for res in range(1,
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10):
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pass
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dis_bug708901 = """\
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%-4d 0 SETUP_LOOP 23 (to 26)
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3 LOAD_GLOBAL 0 (range)
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6 LOAD_CONST 1 (1)
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%-4d 9 LOAD_CONST 2 (10)
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12 CALL_FUNCTION 2
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15 GET_ITER
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>> 16 FOR_ITER 6 (to 25)
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19 STORE_FAST 0 (res)
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%-4d 22 JUMP_ABSOLUTE 16
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>> 25 POP_BLOCK
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>> 26 LOAD_CONST 0 (None)
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29 RETURN_VALUE
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"""%(bug708901.func_code.co_firstlineno + 1,
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bug708901.func_code.co_firstlineno + 2,
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bug708901.func_code.co_firstlineno + 3)
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def bug1333982(x=[]):
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assert 0, ([s for s in x] +
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1)
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pass
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dis_bug1333982 = """\
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%-4d 0 LOAD_CONST 1 (0)
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3 JUMP_IF_TRUE 41 (to 47)
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6 POP_TOP
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7 LOAD_GLOBAL 0 (AssertionError)
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10 BUILD_LIST 0
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13 DUP_TOP
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14 STORE_FAST 1 (_[1])
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17 LOAD_FAST 0 (x)
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20 GET_ITER
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>> 21 FOR_ITER 13 (to 37)
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24 STORE_FAST 2 (s)
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27 LOAD_FAST 1 (_[1])
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30 LOAD_FAST 2 (s)
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33 LIST_APPEND
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34 JUMP_ABSOLUTE 21
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>> 37 DELETE_FAST 1 (_[1])
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%-4d 40 LOAD_CONST 2 (1)
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43 BINARY_ADD
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44 RAISE_VARARGS 2
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>> 47 POP_TOP
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%-4d 48 LOAD_CONST 0 (None)
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51 RETURN_VALUE
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"""%(bug1333982.func_code.co_firstlineno + 1,
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bug1333982.func_code.co_firstlineno + 2,
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bug1333982.func_code.co_firstlineno + 3)
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_BIG_LINENO_FORMAT = """\
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%3d 0 LOAD_GLOBAL 0 (spam)
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3 POP_TOP
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4 LOAD_CONST 0 (None)
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7 RETURN_VALUE
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"""
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class DisTests(unittest.TestCase):
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def do_disassembly_test(self, func, expected):
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s = StringIO.StringIO()
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save_stdout = sys.stdout
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sys.stdout = s
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dis.dis(func)
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sys.stdout = save_stdout
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got = s.getvalue()
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# Trim trailing blanks (if any).
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lines = got.split('\n')
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lines = [line.rstrip() for line in lines]
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expected = expected.split("\n")
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import difflib
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if expected != lines:
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self.fail(
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"events did not match expectation:\n" +
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"\n".join(difflib.ndiff(expected,
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lines)))
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def test_opmap(self):
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self.assertEqual(dis.opmap["STOP_CODE"], 0)
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self.assertEqual(dis.opmap["LOAD_CONST"] in dis.hasconst, True)
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self.assertEqual(dis.opmap["STORE_NAME"] in dis.hasname, True)
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def test_opname(self):
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self.assertEqual(dis.opname[dis.opmap["LOAD_FAST"]], "LOAD_FAST")
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def test_boundaries(self):
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self.assertEqual(dis.opmap["EXTENDED_ARG"], dis.EXTENDED_ARG)
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self.assertEqual(dis.opmap["STORE_NAME"], dis.HAVE_ARGUMENT)
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def test_dis(self):
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self.do_disassembly_test(_f, dis_f)
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def test_bug_708901(self):
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self.do_disassembly_test(bug708901, dis_bug708901)
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def test_bug_1333982(self):
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# This one is checking bytecodes generated for an `assert` statement,
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# so fails if the tests are run with -O. Skip this test then.
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if __debug__:
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self.do_disassembly_test(bug1333982, dis_bug1333982)
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def test_big_linenos(self):
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def func(count):
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namespace = {}
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func = "def foo():\n " + "".join(["\n "] * count + ["spam\n"])
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exec func in namespace
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return namespace['foo']
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# Test all small ranges
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for i in xrange(1, 300):
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expected = _BIG_LINENO_FORMAT % (i + 2)
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self.do_disassembly_test(func(i), expected)
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# Test some larger ranges too
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for i in xrange(300, 5000, 10):
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expected = _BIG_LINENO_FORMAT % (i + 2)
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self.do_disassembly_test(func(i), expected)
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def test_main():
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run_unittest(DisTests)
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if __name__ == "__main__":
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test_main()
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