src/allmydata/test/test_import.py

   1
   2 from twisted.trial import unittest
   3 from twisted.python.monkey import MonkeyPatcher
   4
   5 import allmydata
   6 import __builtin__
   7
   8
   9 class T(unittest.TestCase):
  10     def test_report_import_error(self):
  11         real_import_func = __import__
  12         def raiseIE_from_this_particular_func(name, *args):
  13             if name == "foolscap":
  14                 marker = "wheeeyo"
  15                 raise ImportError(marker + " foolscap cant be imported")
  16             else:
  17                 return real_import_func(name, *args)
  18
  19         # Let's run as little code as possible with __import__ patched.
  20         patcher = MonkeyPatcher((__builtin__, '__import__', raiseIE_from_this_particular_func))
  21         vers_and_locs = patcher.runWithPatches(allmydata.get_package_versions_and_locations)
  22
  23         for (pkgname, stuff) in vers_and_locs:
  24             if pkgname == 'foolscap':
  25                 self.failUnless('wheeeyo' in str(stuff[2]), stuff)
  26                 self.failUnless('raiseIE_from_this_particular_func' in str(stuff[2]), stuff)