[tahoe-lafs-trac-stream] [Tahoe-LAFS] #4049: Some tests fail when run with superuser privileges

[Tahoe-LAFS]

#4049: Some tests fail when run with superuser privileges
---------------------+---------------------------
 Reporter:  exarkun  |          Owner:
     Type:  defect   |         Status:  new
 Priority:  normal   |      Milestone:  undecided
Component:  unknown  |        Version:  n/a
 Keywords:           |  Launchpad Bug:
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 * test_sign_bad_perms
 * test_unreadable_config
 * test_private_config_unreadable
 * test_private_config_unreadable_preexisting
 * test_write_config_unwritable_file

 These all assume that the test process won't be able to read or write a
 path where the associated filesystem permission bit is not set.  This is
 only true as long as the process isn't a superuser.  If it is, it can do
 what it wants and the tests fail as a result.

 It's not a great idea to run Tahoe-LAFS as a superuser but nothing we do
 actively _prevents_ you from doing so.  Also, right now, it would be
 convenient to run some of the test jobs on CI as root inside a Docker
 container (otherwise we need to do an unknown amount of Docker image
 hacking to make running as another user possible).

 So, skip these tests if the test process is root.

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Ticket URL: <https://tahoe-lafs.org/trac/tahoe-lafs/ticket/4049>
Tahoe-LAFS <https://Tahoe-LAFS.org>
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