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annotate Lib/test/test_exceptions.py @ 27998:e27f58a50737 legacy-trunk

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SF bug #690377: Dud footnote reference in distutils docs
author Raymond Hettinger <python@rcn.com>
date Fri, 21 Feb 2003 02:47:09 +0000
parents 226ba34bd998
children 90342f395721
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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1 # Python test set -- part 5, built-in exceptions
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2
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3 from test.test_support import TestFailed, TESTFN, unlink
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4 from types import ClassType
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5 import warnings
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6 import sys, traceback
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7
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8 print '5. Built-in exceptions'
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9 # XXX This is not really enough, each *operation* should be tested!
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10
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11 # Reloading the built-in exceptions module failed prior to Py2.2, while it
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12 # should act the same as reloading built-in sys.
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13 try:
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14 import exceptions
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15 reload(exceptions)
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16 except ImportError, e:
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17 raise TestFailed, e
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18
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19 def test_raise_catch(exc):
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20 try:
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21 raise exc, "spam"
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22 except exc, err:
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23 buf = str(err)
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24 try:
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25 raise exc("spam")
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26 except exc, err:
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27 buf = str(err)
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28 print buf
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29
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30 def r(thing):
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31 test_raise_catch(thing)
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32 if isinstance(thing, ClassType):
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33 print thing.__name__
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34 else:
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35 print thing
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36
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37 r(AttributeError)
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38 import sys
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39 try: x = sys.undefined_attribute
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40 except AttributeError: pass
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41
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42 r(EOFError)
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43 import sys
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44 fp = open(TESTFN, 'w')
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45 fp.close()
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46 fp = open(TESTFN, 'r')
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47 savestdin = sys.stdin
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48 try:
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49 try:
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50 sys.stdin = fp
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51 x = raw_input()
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52 except EOFError:
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53 pass
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54 finally:
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55 sys.stdin = savestdin
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56 fp.close()
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57
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58 r(IOError)
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59 try: open('this file does not exist', 'r')
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60 except IOError: pass
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61
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62 r(ImportError)
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63 try: import undefined_module
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64 except ImportError: pass
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65
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66 r(IndexError)
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67 x = []
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68 try: a = x[10]
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69 except IndexError: pass
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70
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71 r(KeyError)
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72 x = {}
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73 try: a = x['key']
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74 except KeyError: pass
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75
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76 r(KeyboardInterrupt)
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77 print '(not testable in a script)'
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78
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79 r(MemoryError)
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80 print '(not safe to test)'
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81
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82 r(NameError)
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83 try: x = undefined_variable
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84 except NameError: pass
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85
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86 r(OverflowError)
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87 # XXX
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88 # Obscure: this test relies on int+int raising OverflowError if the
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89 # ints are big enough. But ints no longer do that by default. This
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90 # test will have to go away someday. For now, we can convert the
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91 # transitional OverflowWarning into an error.
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92 warnings.filterwarnings("error", "", OverflowWarning, __name__)
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93 x = 1
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94 try:
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95 while 1: x = x+x
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96 except OverflowError: pass
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97
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98 r(RuntimeError)
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99 print '(not used any more?)'
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100
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101 r(SyntaxError)
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102 try: exec '/\n'
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103 except SyntaxError: pass
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104
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105 # make sure the right exception message is raised for each of these
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106 # code fragments:
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107
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108 def ckmsg(src, msg):
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109 try:
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110 compile(src, '<fragment>', 'exec')
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111 except SyntaxError, e:
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112 print e.msg
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113 if e.msg == msg:
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114 print "ok"
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115 else:
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116 print "expected:", msg
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117 else:
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118 print "failed to get expected SyntaxError"
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119
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120 s = '''\
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121 while 1:
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122 try:
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123 pass
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124 finally:
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125 continue
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126 '''
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127 if sys.platform.startswith('java'):
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128 print "'continue' not supported inside 'finally' clause"
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129 print "ok"
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130 else:
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131 ckmsg(s, "'continue' not supported inside 'finally' clause")
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132 s = '''\
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133 try:
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134 continue
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135 except:
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136 pass
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137 '''
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138 ckmsg(s, "'continue' not properly in loop")
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139 ckmsg("continue\n", "'continue' not properly in loop")
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140
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141 r(IndentationError)
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142
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143 r(TabError)
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144 # can only be tested under -tt, and is the only test for -tt
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145 #try: compile("try:\n\t1/0\n \t1/0\nfinally:\n pass\n", '<string>', 'exec')
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146 #except TabError: pass
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147 #else: raise TestFailed
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148
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149 r(SystemError)
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150 print '(hard to reproduce)'
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151
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152 r(SystemExit)
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153 import sys
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154 try: sys.exit(0)
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155 except SystemExit: pass
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156
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157 r(TypeError)
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158 try: [] + ()
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159 except TypeError: pass
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160
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161 r(ValueError)
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162 try: x = chr(10000)
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163 except ValueError: pass
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164
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165 r(ZeroDivisionError)
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166 try: x = 1/0
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167 except ZeroDivisionError: pass
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168
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169 r(Exception)
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170 try: x = 1/0
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171 except Exception, e: pass
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172
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173 # test that setting an exception at the C level works even if the
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174 # exception object can't be constructed.
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175
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176 class BadException:
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177 def __init__(self):
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178 raise RuntimeError, "can't instantiate BadException"
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179
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180 def test_capi1():
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181 import _testcapi
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182 try:
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183 _testcapi.raise_exception(BadException, 1)
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184 except TypeError, err:
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185 exc, err, tb = sys.exc_info()
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186 co = tb.tb_frame.f_code
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187 assert co.co_name == "test_capi1"
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188 assert co.co_filename.endswith('test_exceptions.py')
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189 else:
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190 print "Expected exception"
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191
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192 def test_capi2():
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193 import _testcapi
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194 try:
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195 _testcapi.raise_exception(BadException, 0)
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196 except RuntimeError, err:
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197 exc, err, tb = sys.exc_info()
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198 co = tb.tb_frame.f_code
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199 assert co.co_name == "__init__"
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200 assert co.co_filename.endswith('test_exceptions.py')
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201 co2 = tb.tb_frame.f_back.f_code
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202 assert co2.co_name == "test_capi2"
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203 else:
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204 print "Expected exception"
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205
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206 if not sys.platform.startswith('java'):
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207 test_capi1()
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208 test_capi2()
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209
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210 unlink(TESTFN)