Mercurial > hg
annotate tests/test-demandimport.py @ 46924:ca0049946e9a
split: avoid strip if split is a no-op (identical to original)
Differential Revision: https://phab.mercurial-scm.org/D10389
author | Kyle Lippincott <spectral@google.com> |
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date | Mon, 12 Apr 2021 19:25:34 -0700 |
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1 from __future__ import absolute_import, print_function |
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2 |
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3 from mercurial import demandimport |
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4 |
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5 demandimport.enable() |
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6 |
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7 import os |
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8 import subprocess |
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9 import sys |
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10 import types |
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11 |
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12 # Don't import pycompat because it has too many side-effects. |
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13 ispy3 = sys.version_info[0] >= 3 |
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14 |
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15 # Only run if demandimport is allowed |
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16 if subprocess.call( |
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17 [os.environ['PYTHON'], '%s/hghave' % os.environ['TESTDIR'], 'demandimport'] |
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18 ): |
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19 sys.exit(80) |
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20 |
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21 # We rely on assert, which gets optimized out. |
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22 if sys.flags.optimize: |
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23 sys.exit(80) |
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24 |
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25 # The demand importer doesn't work on Python 3.5. |
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26 if sys.version_info[0:2] == (3, 5): |
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27 sys.exit(80) |
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28 |
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29 if ispy3: |
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30 from importlib.util import _LazyModule |
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31 |
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32 try: |
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33 from importlib.util import _Module as moduletype |
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34 except ImportError: |
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35 moduletype = types.ModuleType |
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36 else: |
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37 moduletype = types.ModuleType |
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38 |
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39 if os.name != 'nt': |
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40 try: |
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41 import distutils.msvc9compiler |
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42 |
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43 print( |
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44 'distutils.msvc9compiler needs to be an immediate ' |
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45 'importerror on non-windows platforms' |
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46 ) |
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47 distutils.msvc9compiler |
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48 except ImportError: |
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49 pass |
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50 |
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51 import re |
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52 |
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53 rsub = re.sub |
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54 |
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55 |
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56 def f(obj): |
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57 l = repr(obj) |
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58 l = rsub("0x[0-9a-fA-F]+", "0x?", l) |
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59 l = rsub("from '.*'", "from '?'", l) |
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60 l = rsub("'<[a-z]*>'", "'<whatever>'", l) |
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61 return l |
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62 |
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63 |
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64 demandimport.disable() |
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65 os.environ['HGDEMANDIMPORT'] = 'disable' |
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66 # this enable call should not actually enable demandimport! |
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67 demandimport.enable() |
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68 from mercurial import node |
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69 |
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70 # We use assert instead of a unittest test case because having imports inside |
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71 # functions changes behavior of the demand importer. |
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72 if ispy3: |
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73 assert not isinstance(node, _LazyModule) |
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74 else: |
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75 assert f(node) == "<module 'mercurial.node' from '?'>", f(node) |
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76 |
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77 # now enable it for real |
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78 del os.environ['HGDEMANDIMPORT'] |
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79 demandimport.enable() |
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80 |
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81 # Test access to special attributes through demandmod proxy |
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82 assert 'mercurial.error' not in sys.modules |
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83 from mercurial import error as errorproxy |
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84 |
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85 if ispy3: |
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86 # unsure why this isn't lazy. |
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87 assert not isinstance(f, _LazyModule) |
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88 assert f(errorproxy) == "<module 'mercurial.error' from '?'>", f(errorproxy) |
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89 else: |
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90 assert f(errorproxy) == "<unloaded module 'error'>", f(errorproxy) |
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91 |
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92 doc = ' '.join(errorproxy.__doc__.split()[:3]) |
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93 assert doc == 'Mercurial exceptions. This', doc |
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94 assert errorproxy.__name__ == 'mercurial.error', errorproxy.__name__ |
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95 |
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96 # __name__ must be accessible via __dict__ so the relative imports can be |
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97 # resolved |
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98 name = errorproxy.__dict__['__name__'] |
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99 assert name == 'mercurial.error', name |
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100 |
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101 if ispy3: |
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102 assert not isinstance(errorproxy, _LazyModule) |
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103 assert f(errorproxy) == "<module 'mercurial.error' from '?'>", f(errorproxy) |
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104 else: |
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105 assert f(errorproxy) == "<proxied module 'error'>", f(errorproxy) |
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106 |
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107 import os |
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108 |
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109 if ispy3: |
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110 assert not isinstance(os, _LazyModule) |
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111 assert f(os) == "<module 'os' from '?'>", f(os) |
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112 else: |
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113 assert f(os) == "<unloaded module 'os'>", f(os) |
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114 |
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115 assert f(os.system) == '<built-in function system>', f(os.system) |
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116 assert f(os) == "<module 'os' from '?'>", f(os) |
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117 |
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118 assert 'mercurial.utils.procutil' not in sys.modules |
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119 from mercurial.utils import procutil |
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120 |
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121 if ispy3: |
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122 assert isinstance(procutil, _LazyModule) |
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123 assert f(procutil) == "<module 'mercurial.utils.procutil' from '?'>", f( |
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124 procutil |
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125 ) |
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126 else: |
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127 assert f(procutil) == "<unloaded module 'procutil'>", f(procutil) |
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128 |
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129 assert f(procutil.system) == '<function system at 0x?>', f(procutil.system) |
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130 assert procutil.__class__ == moduletype, procutil.__class__ |
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131 assert f(procutil) == "<module 'mercurial.utils.procutil' from '?'>", f( |
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132 procutil |
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133 ) |
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134 assert f(procutil.system) == '<function system at 0x?>', f(procutil.system) |
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135 |
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136 assert 'mercurial.hgweb' not in sys.modules |
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137 from mercurial import hgweb |
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138 |
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139 if ispy3: |
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140 assert isinstance(hgweb, _LazyModule) |
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141 assert f(hgweb) == "<module 'mercurial.hgweb' from '?'>", f(hgweb) |
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142 assert isinstance(hgweb.hgweb_mod, _LazyModule) |
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143 assert ( |
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144 f(hgweb.hgweb_mod) == "<module 'mercurial.hgweb.hgweb_mod' from '?'>" |
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145 ), f(hgweb.hgweb_mod) |
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146 else: |
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147 assert f(hgweb) == "<unloaded module 'hgweb'>", f(hgweb) |
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148 assert f(hgweb.hgweb_mod) == "<unloaded module 'hgweb_mod'>", f( |
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149 hgweb.hgweb_mod |
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150 ) |
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151 |
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152 assert f(hgweb) == "<module 'mercurial.hgweb' from '?'>", f(hgweb) |
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153 |
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154 import re as fred |
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155 |
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156 if ispy3: |
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157 assert not isinstance(fred, _LazyModule) |
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158 assert f(fred) == "<module 're' from '?'>" |
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159 else: |
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160 assert f(fred) == "<unloaded module 're'>", f(fred) |
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161 |
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162 import re as remod |
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163 |
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164 if ispy3: |
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165 assert not isinstance(remod, _LazyModule) |
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166 assert f(remod) == "<module 're' from '?'>" |
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167 else: |
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168 assert f(remod) == "<unloaded module 're'>", f(remod) |
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169 |
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170 import sys as re |
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171 |
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172 if ispy3: |
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173 assert not isinstance(re, _LazyModule) |
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174 assert f(re) == "<module 'sys' (built-in)>" |
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175 else: |
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176 assert f(re) == "<unloaded module 'sys'>", f(re) |
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177 |
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178 if ispy3: |
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179 assert not isinstance(fred, _LazyModule) |
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180 assert f(fred) == "<module 're' from '?'>", f(fred) |
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181 else: |
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182 assert f(fred) == "<unloaded module 're'>", f(fred) |
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183 |
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184 assert f(fred.sub) == '<function sub at 0x?>', f(fred.sub) |
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185 |
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186 if ispy3: |
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187 assert not isinstance(fred, _LazyModule) |
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188 assert f(fred) == "<module 're' from '?'>", f(fred) |
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189 else: |
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190 assert f(fred) == "<proxied module 're'>", f(fred) |
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191 |
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192 remod.escape # use remod |
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193 assert f(remod) == "<module 're' from '?'>", f(remod) |
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194 |
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195 if ispy3: |
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196 assert not isinstance(re, _LazyModule) |
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197 assert f(re) == "<module 'sys' (built-in)>" |
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198 assert f(type(re.stderr)) == "<class '_io.TextIOWrapper'>", f( |
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199 type(re.stderr) |
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200 ) |
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201 assert f(re) == "<module 'sys' (built-in)>" |
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202 else: |
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203 assert f(re) == "<unloaded module 'sys'>", f(re) |
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204 assert f(re.stderr) == "<open file '<whatever>', mode 'w' at 0x?>", f( |
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205 re.stderr |
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206 ) |
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207 assert f(re) == "<proxied module 'sys'>", f(re) |
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208 |
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209 assert 'telnetlib' not in sys.modules |
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210 import telnetlib |
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211 |
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212 if ispy3: |
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213 assert isinstance(telnetlib, _LazyModule) |
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214 assert f(telnetlib) == "<module 'telnetlib' from '?'>" |
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215 else: |
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216 assert f(telnetlib) == "<unloaded module 'telnetlib'>", f(telnetlib) |
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217 |
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218 try: |
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219 from telnetlib import unknownattr |
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220 |
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221 assert False, ( |
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222 'no demandmod should be created for attribute of non-package ' |
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223 'module:\ntelnetlib.unknownattr = %s' % f(unknownattr) |
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224 ) |
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225 except ImportError as inst: |
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226 assert rsub(r"'", '', str(inst)).startswith( |
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227 'cannot import name unknownattr' |
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228 ) |
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229 |
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230 from mercurial import util |
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231 |
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232 # Unlike the import statement, __import__() function should not raise |
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233 # ImportError even if fromlist has an unknown item |
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234 # (see Python/import.c:import_module_level() and ensure_fromlist()) |
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235 assert 'ftplib' not in sys.modules |
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236 zipfileimp = __import__('ftplib', globals(), locals(), ['unknownattr']) |
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237 assert f(zipfileimp) == "<module 'ftplib' from '?'>", f(zipfileimp) |
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238 assert not util.safehasattr(zipfileimp, 'unknownattr') |