amend to a147a8b0e1b2f32b6f191932afd3c2db9765e2e3: systemd journal test-cases - additional check appropriate default settings (if testing as not root/sudoer)

fail2ban/tests/filtertestcase.py

@@ -1352,7 +1352,6 @@ def get_monitor_failures_journal_testcase(Filter_): # pragma: systemd no cover
 		def setUp(self):
 			"""Call before every test case."""
 			super(MonitorJournalFailures, self).setUp()
-			self._runtimeJournal = None
 			self.test_file = os.path.join(TEST_FILES_DIR, "testcase-journal.log")
 			self.jail = DummyJail()
 			self.filter = None
@@ -1390,7 +1389,7 @@ def get_monitor_failures_journal_testcase(Filter_): # pragma: systemd no cover
 			If not found, SkipTest exception will be raised.
 			"""
 			# we can cache it:
-			if self._runtimeJournal is None:
+			if not hasattr(MonitorJournalFailures, "_runtimeJournal"):
 				# Depending on the system, it could be found under /run or /var/log (e.g. Debian)
 				# which are pointed by different systemd-path variables.  We will
 				# check one at at time until the first hit
@@ -1402,9 +1401,14 @@ def get_monitor_failures_journal_testcase(Filter_): # pragma: systemd no cover
 					self.assertTrue(tmp)
 					out = str(tmp[1].decode('utf-8')).split('\n')[0]
 					if out: break
-				self._runtimeJournal = out
-			if self._runtimeJournal:
-				return self._runtimeJournal
+				# additional check appropriate default settings (if not root/sudoer and not already set):
+				if os.geteuid() != 0 and os.getenv("F2B_SYSTEMD_DEFAULT_FLAGS", None) is None:
+					# filter default SYSTEM_ONLY(4) is hardly usable for not root/sudoer tester,
+					# so back to default LOCAL_ONLY(1):
+					os.environ["F2B_SYSTEMD_DEFAULT_FLAGS"] = "0"; # or "1", what will be similar to journalflags=0 or ...=1
+				MonitorJournalFailures._runtimeJournal = out
+			if MonitorJournalFailures._runtimeJournal:
+				return MonitorJournalFailures._runtimeJournal
 			raise unittest.SkipTest('systemd journal seems to be not available (e. g. no rights to read)')
 		
 		def testJournalFilesArg(self):