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tests: Rework backup test inheritance to make LP constraints clearer

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The backup tests have a special constraint where we always want to use
check_output() over runcmd(). The reason is we need the samba-tool
backup/restore commands executed in a separate process. Otherwise the
global underlying LoadParm can accumulate settings from earlier test
case runs.

We can avoid someone in future inadvertently running runcmd() by
mistake, by simply changing the inheritance so we no longer inherit from
SambaToolCmdTest (so the runcmd functions are no longer present).

The comment explaining this has been moved to the top of the file.

Note that the TestCaseInTempDir inheritance was redundant.
BlackboxTestCase inherits from TestCaseInTempDir (and SambaToolCmdTest
was inheriting from BlackboxTestCase).

BUG: https://bugzilla.samba.org/show_bug.cgi?id=13676

Signed-off-by: Tim Beale <timbeale@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>

Autobuild-User(master): Tim Beale <timbeale@samba.org>
Autobuild-Date(master): Tue Nov 27 06:57:03 CET 2018 on sn-devel-144
This commit is contained in:
Tim Beale
2018-11-22 16:56:22 +13:00
committed by Tim Beale
parent cbcd8eec6e
commit 0d15c2be6a
2 changed files with 21 additions and 14 deletions
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12
python/samba/tests/domain_backup_offline.py
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@ -19,11 +19,17 @@ import tarfile
import os
import shutil
import tempfile
from samba.tests.samba_tool.base import SambaToolCmdTest
from samba.tests import TestCaseInTempDir
from samba.tests import BlackboxTestCase
from samba.netcmd import CommandError
class DomainBackupOfflineCmp(SambaToolCmdTest, TestCaseInTempDir):
# The backup tests require that a completely clean LoadParm object gets used
# for the restore. Otherwise the same global LP gets re-used, and the LP
# settings can bleed from one test case to another.
# To do this, these tests should use check_output(), which executes the command
# in a separate process (as opposed to runcmd(), runsubcmd()).
# So although this is a samba-tool test, we don't inherit from SambaToolCmdTest
# so that we never inadvertently use .runcmd() by accident.
class DomainBackupOfflineCmp(BlackboxTestCase):
def test_domain_backup_offline_untar_tdb(self):
self.untar_testcase('tdb')