[tahoe-lafs-trac-stream] [Tahoe-LAFS] #4190: Broken tests: failUnlessRaises has been deprecated

[Tahoe-LAFS]

#4190: Broken tests: failUnlessRaises has been deprecated
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     Reporter:  hacklschorsch  |      Owner:
         Type:  defect         |     Status:  new
     Priority:  normal         |  Milestone:  undecided
    Component:  unknown        |    Version:  n/a
   Resolution:                 |   Keywords:
Launchpad Bug:                 |
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Comment (by hacklschorsch):

 11 tests are failing in this [https://app.circleci.com/pipelines/github
 /tahoe-lafs/tahoe-lafs/5377/workflows/cd00a81d-
 54c3-43be-8041-719ea727c3f1/jobs/91883/tests|Windows Server 2022 CPython
 3.12 test run] with `AttributeError: 'Complete' object has no attribute
 'failUnlessRaises'` (or similar).

 It seems this is not a Windows problem though, but a very-recent-python-
 problem:

 Due to some different bug, that test suite seems to not be running CPython
 `3.12`, but `3.13.7`.

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Ticket URL: <https://tahoe-lafs.org/trac/tahoe-lafs/ticket/4190#comment:1>
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