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diff --git a/tests/da-mainmsg-q.sh b/tests/da-mainmsg-q.sh
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+#!/bin/bash
+# Test for DA mode on the main message queue
+# This test checks if DA mode operates correctly. To do so,
+# it uses a small in-memory queue size, so that DA mode is initiated
+# rather soon, and disk spooling used. There is some uncertainty (based
+# on machine speeds), but in general the test should work rather well.
+# We add a few messages after the initial run, just so that we can
+# check everything recovers from DA mode correctly.
+# added 2009-04-22 by Rgerhards
+# This file is part of the rsyslog project, released under ASL 2.0
+. ${srcdir:=.}/diag.sh init
+generate_conf
+add_conf '
+$ModLoad ../plugins/imtcp/.libs/imtcp
+$MainMsgQueueTimeoutShutdown 10000
+input(type="imtcp" port="0" listenPortFileName="'$RSYSLOG_DYNNAME'.tcpflood_port")
+
+# set spool locations and switch queue to disk assisted mode
+$WorkDirectory '$RSYSLOG_DYNNAME'.spool
+$MainMsgQueueSize 200 # this *should* trigger moving on to DA mode...
+# note: we must set QueueSize sufficiently high, so that 70% (light delay mark)
+# is high enough above HighWatermark!
+$MainMsgQueueHighWatermark 80
+$MainMsgQueueLowWatermark 40
+$MainMsgQueueFilename mainq
+$MainMsgQueueType linkedlist
+
+$template outfmt,"%msg:F,58:2%\n"
+template(name="dynfile" type="string" string=`echo $RSYSLOG_OUT_LOG`) # trick to use relative path names!
+:msg, contains, "msgnum:" ?dynfile;outfmt
+'
+startup
+
+# part1: send first 50 messages (in memory, only)
+injectmsg 0 50
+wait_file_lines $RSYSLOG_OUT_LOG 50 # let queue drain for this test case
+
+# part 2: send bunch of messages. This should trigger DA mode
+injectmsg 50 2000
+ls -l ${RSYSLOG_DYNNAME}.spool # for manual review
+wait_file_lines $RSYSLOG_OUT_LOG 2050 # wait to ensure DA queue is "empty"
+
+# send another handful
+injectmsg 2050 50
+
+shutdown_when_empty
+wait_shutdown
+seq_check 0 2099
+exit_test