Mercurial > cpython-lru_cache-weakref

annotate Lib/test/test_dis.py @ 79675:c0a2294de787 2.7

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Issue #16199: Backport 2to3 typo fix from 3.2.
author Chris Jerdonek <chris.jerdonek@gmail.com>
date Thu, 11 Oct 2012 16:15:46 -0700
parents 595ad43fdd94
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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1 # Minimal tests for dis module
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2
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3 from test.test_support import run_unittest
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4 import unittest
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5 import sys
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6 import dis
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7 import StringIO
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8
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9
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10 def _f(a):
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11 print a
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12 return 1
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13
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14 dis_f = """\
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15 %-4d 0 LOAD_FAST 0 (a)
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16 3 PRINT_ITEM
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17 4 PRINT_NEWLINE
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18
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19 %-4d 5 LOAD_CONST 1 (1)
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20 8 RETURN_VALUE
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21 """%(_f.func_code.co_firstlineno + 1,
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22 _f.func_code.co_firstlineno + 2)
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23
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24
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25 def bug708901():
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26 for res in range(1,
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27 10):
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28 pass
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29
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30 dis_bug708901 = """\
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31 %-4d 0 SETUP_LOOP 23 (to 26)
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32 3 LOAD_GLOBAL 0 (range)
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33 6 LOAD_CONST 1 (1)
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34
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35 %-4d 9 LOAD_CONST 2 (10)
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36 12 CALL_FUNCTION 2
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37 15 GET_ITER
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38 >> 16 FOR_ITER 6 (to 25)
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39 19 STORE_FAST 0 (res)
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40
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41 %-4d 22 JUMP_ABSOLUTE 16
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42 >> 25 POP_BLOCK
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43 >> 26 LOAD_CONST 0 (None)
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44 29 RETURN_VALUE
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45 """%(bug708901.func_code.co_firstlineno + 1,
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46 bug708901.func_code.co_firstlineno + 2,
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47 bug708901.func_code.co_firstlineno + 3)
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48
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49
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50 def bug1333982(x=[]):
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51 assert 0, ([s for s in x] +
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52 1)
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53 pass
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54
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55 dis_bug1333982 = """\
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56 %-4d 0 LOAD_CONST 1 (0)
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57 3 POP_JUMP_IF_TRUE 41
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58 6 LOAD_GLOBAL 0 (AssertionError)
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59 9 BUILD_LIST 0
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60 12 LOAD_FAST 0 (x)
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61 15 GET_ITER
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62 >> 16 FOR_ITER 12 (to 31)
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63 19 STORE_FAST 1 (s)
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64 22 LOAD_FAST 1 (s)
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65 25 LIST_APPEND 2
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66 28 JUMP_ABSOLUTE 16
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67
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68 %-4d >> 31 LOAD_CONST 2 (1)
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69 34 BINARY_ADD
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70 35 CALL_FUNCTION 1
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71 38 RAISE_VARARGS 1
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72
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73 %-4d >> 41 LOAD_CONST 0 (None)
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74 44 RETURN_VALUE
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75 """%(bug1333982.func_code.co_firstlineno + 1,
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76 bug1333982.func_code.co_firstlineno + 2,
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77 bug1333982.func_code.co_firstlineno + 3)
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78
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79 _BIG_LINENO_FORMAT = """\
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80 %3d 0 LOAD_GLOBAL 0 (spam)
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81 3 POP_TOP
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82 4 LOAD_CONST 0 (None)
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83 7 RETURN_VALUE
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84 """
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85
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86 class DisTests(unittest.TestCase):
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87 def do_disassembly_test(self, func, expected):
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88 s = StringIO.StringIO()
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89 save_stdout = sys.stdout
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90 sys.stdout = s
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91 dis.dis(func)
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92 sys.stdout = save_stdout
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93 got = s.getvalue()
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94 # Trim trailing blanks (if any).
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95 lines = got.split('\n')
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96 lines = [line.rstrip() for line in lines]
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97 expected = expected.split("\n")
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98 import difflib
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99 if expected != lines:
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100 self.fail(
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101 "events did not match expectation:\n" +
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102 "\n".join(difflib.ndiff(expected,
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103 lines)))
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104
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105 def test_opmap(self):
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106 self.assertEqual(dis.opmap["STOP_CODE"], 0)
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107 self.assertIn(dis.opmap["LOAD_CONST"], dis.hasconst)
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108 self.assertIn(dis.opmap["STORE_NAME"], dis.hasname)
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109
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110 def test_opname(self):
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111 self.assertEqual(dis.opname[dis.opmap["LOAD_FAST"]], "LOAD_FAST")
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112
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113 def test_boundaries(self):
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114 self.assertEqual(dis.opmap["EXTENDED_ARG"], dis.EXTENDED_ARG)
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115 self.assertEqual(dis.opmap["STORE_NAME"], dis.HAVE_ARGUMENT)
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116
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117 def test_dis(self):
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118 self.do_disassembly_test(_f, dis_f)
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119
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120 def test_bug_708901(self):
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121 self.do_disassembly_test(bug708901, dis_bug708901)
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122
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123 def test_bug_1333982(self):
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124 # This one is checking bytecodes generated for an `assert` statement,
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125 # so fails if the tests are run with -O. Skip this test then.
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126 if __debug__:
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127 self.do_disassembly_test(bug1333982, dis_bug1333982)
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128
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129 def test_big_linenos(self):
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130 def func(count):
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131 namespace = {}
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132 func = "def foo():\n " + "".join(["\n "] * count + ["spam\n"])
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133 exec func in namespace
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134 return namespace['foo']
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135
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136 # Test all small ranges
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137 for i in xrange(1, 300):
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138 expected = _BIG_LINENO_FORMAT % (i + 2)
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139 self.do_disassembly_test(func(i), expected)
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140
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Neal Norwitz <nnorwitz@gmail.com>
parents: 36824
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141 # Test some larger ranges too
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parents: 36824
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142 for i in xrange(300, 5000, 10):
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parents: 36824
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143 expected = _BIG_LINENO_FORMAT % (i + 2)
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Neal Norwitz <nnorwitz@gmail.com>
parents: 36824
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144 self.do_disassembly_test(func(i), expected)
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parents: 36824
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145
28090
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146 def test_main():
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147 run_unittest(DisTests)
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148
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149
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150 if __name__ == "__main__":
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151 test_main()