Mercurial > hg
annotate tests/test-demandimport.py @ 49908:789e152a6bdb
pathutil: use `finddirs_rev_noroot` instead of `parts`
The benefit this brings is very tiny, if it's even there,
since we still didn't get rid of the [parts] computation.
It probably won't be worth it without the subsequent patch
that adds one more use of [finddirs_rev_noroot]
author | Arseniy Alekseyev <aalekseyev@janestreet.com> |
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date | Fri, 06 Jan 2023 16:42:24 +0000 |
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1 from mercurial import demandimport |
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2 |
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3 demandimport.enable() |
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4 |
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5 import os |
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6 import subprocess |
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7 import sys |
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8 import types |
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9 |
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10 # Don't import pycompat because it has too many side-effects. |
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11 |
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12 # Only run if demandimport is allowed |
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13 if subprocess.call( |
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14 [os.environ['PYTHON'], '%s/hghave' % os.environ['TESTDIR'], 'demandimport'] |
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15 ): |
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16 sys.exit(80) |
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17 |
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18 # We rely on assert, which gets optimized out. |
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19 if sys.flags.optimize: |
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20 sys.exit(80) |
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21 |
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22 # The demand importer doesn't work on Python 3.5. |
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23 if sys.version_info[0:2] == (3, 5): |
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24 sys.exit(80) |
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25 |
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26 from importlib.util import _LazyModule |
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27 |
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28 try: |
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29 from importlib.util import _Module as moduletype |
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30 except ImportError: |
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31 moduletype = types.ModuleType |
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32 |
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33 if os.name != 'nt': |
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34 try: |
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35 import distutils.msvc9compiler |
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36 |
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37 print( |
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38 'distutils.msvc9compiler needs to be an immediate ' |
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39 'importerror on non-windows platforms' |
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40 ) |
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41 distutils.msvc9compiler |
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42 except ImportError: |
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43 pass |
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44 |
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45 import re |
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46 |
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47 rsub = re.sub |
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48 |
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49 |
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50 def f(obj): |
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51 l = repr(obj) |
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52 l = rsub("0x[0-9a-fA-F]+", "0x?", l) |
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53 l = rsub("from '.*'", "from '?'", l) |
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54 l = rsub("'<[a-z]*>'", "'<whatever>'", l) |
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55 return l |
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56 |
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57 |
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58 demandimport.disable() |
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59 os.environ['HGDEMANDIMPORT'] = 'disable' |
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60 # this enable call should not actually enable demandimport! |
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61 demandimport.enable() |
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62 from mercurial import node |
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63 |
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64 # We use assert instead of a unittest test case because having imports inside |
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65 # functions changes behavior of the demand importer. |
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66 assert not isinstance(node, _LazyModule) |
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67 |
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68 # now enable it for real |
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69 del os.environ['HGDEMANDIMPORT'] |
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70 demandimport.enable() |
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71 |
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72 # Test access to special attributes through demandmod proxy |
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73 assert 'mercurial.error' not in sys.modules |
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74 from mercurial import error as errorproxy |
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75 |
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76 # unsure why this isn't lazy. |
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77 assert not isinstance(f, _LazyModule) |
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78 assert f(errorproxy) == "<module 'mercurial.error' from '?'>", f(errorproxy) |
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79 |
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80 doc = ' '.join(errorproxy.__doc__.split()[:3]) |
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81 assert doc == 'Mercurial exceptions. This', doc |
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82 assert errorproxy.__name__ == 'mercurial.error', errorproxy.__name__ |
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83 |
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84 # __name__ must be accessible via __dict__ so the relative imports can be |
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85 # resolved |
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86 name = errorproxy.__dict__['__name__'] |
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87 assert name == 'mercurial.error', name |
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88 |
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89 assert not isinstance(errorproxy, _LazyModule) |
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90 assert f(errorproxy) == "<module 'mercurial.error' from '?'>", f(errorproxy) |
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91 |
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92 import os |
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93 |
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94 assert not isinstance(os, _LazyModule) |
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95 assert f(os) == "<module 'os' from '?'>", f(os) |
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96 |
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97 assert f(os.system) == '<built-in function system>', f(os.system) |
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98 assert f(os) == "<module 'os' from '?'>", f(os) |
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99 |
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100 assert 'mercurial.utils.procutil' not in sys.modules |
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101 from mercurial.utils import procutil |
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102 |
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103 assert isinstance(procutil, _LazyModule) |
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104 assert f(procutil) == "<module 'mercurial.utils.procutil' from '?'>", f( |
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105 procutil |
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106 ) |
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107 |
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108 assert f(procutil.system) == '<function system at 0x?>', f(procutil.system) |
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109 assert procutil.__class__ == moduletype, procutil.__class__ |
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110 assert f(procutil) == "<module 'mercurial.utils.procutil' from '?'>", f( |
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111 procutil |
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112 ) |
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113 assert f(procutil.system) == '<function system at 0x?>', f(procutil.system) |
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114 |
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115 assert 'mercurial.hgweb' not in sys.modules |
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116 from mercurial import hgweb |
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117 |
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118 assert isinstance(hgweb, _LazyModule) |
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119 assert f(hgweb) == "<module 'mercurial.hgweb' from '?'>", f(hgweb) |
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120 assert isinstance(hgweb.hgweb_mod, _LazyModule) |
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121 assert f(hgweb.hgweb_mod) == "<module 'mercurial.hgweb.hgweb_mod' from '?'>", f( |
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122 hgweb.hgweb_mod |
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123 ) |
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124 |
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125 assert f(hgweb) == "<module 'mercurial.hgweb' from '?'>", f(hgweb) |
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126 |
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127 import re as fred |
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128 |
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129 assert not isinstance(fred, _LazyModule) |
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130 assert f(fred) == "<module 're' from '?'>" |
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131 |
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132 import re as remod |
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133 |
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134 assert not isinstance(remod, _LazyModule) |
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135 assert f(remod) == "<module 're' from '?'>" |
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136 |
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137 import sys as re |
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138 |
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139 assert not isinstance(re, _LazyModule) |
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140 assert f(re) == "<module 'sys' (built-in)>" |
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141 |
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142 assert not isinstance(fred, _LazyModule) |
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143 assert f(fred) == "<module 're' from '?'>", f(fred) |
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144 |
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145 assert f(fred.sub) == '<function sub at 0x?>', f(fred.sub) |
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146 |
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147 assert not isinstance(fred, _LazyModule) |
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148 assert f(fred) == "<module 're' from '?'>", f(fred) |
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149 |
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150 remod.escape # use remod |
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151 assert f(remod) == "<module 're' from '?'>", f(remod) |
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152 |
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153 assert not isinstance(re, _LazyModule) |
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154 assert f(re) == "<module 'sys' (built-in)>" |
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155 assert f(type(re.stderr)) == "<class '_io.TextIOWrapper'>", f(type(re.stderr)) |
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156 assert f(re) == "<module 'sys' (built-in)>" |
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157 |
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158 assert 'telnetlib' not in sys.modules |
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159 import telnetlib |
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160 |
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161 assert isinstance(telnetlib, _LazyModule) |
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162 assert f(telnetlib) == "<module 'telnetlib' from '?'>" |
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163 |
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164 try: |
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165 from telnetlib import unknownattr |
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166 |
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167 assert False, ( |
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168 'no demandmod should be created for attribute of non-package ' |
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169 'module:\ntelnetlib.unknownattr = %s' % f(unknownattr) |
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170 ) |
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171 except ImportError as inst: |
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172 assert rsub(r"'", '', str(inst)).startswith( |
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173 'cannot import name unknownattr' |
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174 ) |
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175 |
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176 from mercurial import util |
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177 |
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178 # Unlike the import statement, __import__() function should not raise |
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179 # ImportError even if fromlist has an unknown item |
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180 # (see Python/import.c:import_module_level() and ensure_fromlist()) |
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181 assert 'ftplib' not in sys.modules |
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182 zipfileimp = __import__('ftplib', globals(), locals(), ['unknownattr']) |
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183 assert f(zipfileimp) == "<module 'ftplib' from '?'>", f(zipfileimp) |
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184 assert not util.safehasattr(zipfileimp, 'unknownattr') |
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185 |
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186 |
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187 # test deactivation for issue6725 |
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188 del sys.modules['telnetlib'] |
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189 with demandimport.deactivated(): |
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190 import telnetlib |
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191 assert telnetlib.__loader__ == telnetlib.__spec__.loader |
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192 assert telnetlib.__loader__.get_resource_reader |