#!/bin/bash

# Tests for Serval DNA server operations.
#
# Copyright 2012 Serval Project, Inc.
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License
# as published by the Free Software Foundation; either version 2
# of the License, or (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.

source "${0%/*}/../testframework.sh"
source "${0%/*}/../testdefs.sh"

setup() {
   setup_servald
   assert_no_servald_processes
}

teardown() {
   get_servald_server_pidfile && stop_servald_server
   kill_all_servald_processes
   assert_no_servald_processes
   report_all_servald_servers
}

# make sure servald config is blank
configure_servald_server() {
   :
}

doc_StartCreateInstanceDir="Starting server creates instance directory"
setup_StartCreateInstanceDir() {
   setup
   assert [ ! -d "$SERVALINSTANCE_PATH" ]
}
test_StartCreateInstanceDir() {
   executeOk $servald start
   assert [ -d "$SERVALINSTANCE_PATH" ]
}

doc_StartLogfile="Starting server gives no errors"
setup_StartLogfile() {
   setup
   executeOk_servald config set log.file.directory_path "$PWD/log"
}
test_StartLogfile() {
   start_servald_server
   assert_servald_server_no_errors
}

doc_StartNoInterfaces="Starting server with no configured interfaces gives warning"
setup_StartNoInterfaces() {
   setup
}
test_StartNoInterfaces() {
   start_servald_server
   sleep 0.1
   assertGrep --message="log contains 'no interfaces' warning" "$instance_servald_log" '^WARN:.*interfaces'
   tfw_cat "$instance_servald_log"
}

doc_StartNoErrors="Starting server on dummy file interface gives no errors"
setup_StartNoErrors() {
   setup
   add_servald_interface --file
}
test_StartNoErrors() {
   start_servald_server
   wait_until grep "Interface .* is up" $instance_servald_log
   assert_servald_server_no_errors
   tfw_cat "$instance_servald_log"
}

doc_StartLocalNoErrors="Starting server on local interface gives no errors"
setup_StartLocalNoErrors() {
   setup
   add_servald_interface
}
test_StartLocalNoErrors() {
   start_servald_server
   wait_until grep "Interface .* is up" $instance_servald_log
   assert_servald_server_no_errors
   tfw_cat "$instance_servald_log"
}

doc_StartStart="Start server while already running"
setup_StartStart() {
   setup
   start_servald_server
}
test_StartStart() {
   execute --exit-status=10 $servald start
   extract_stdout_keyvalue start_instance_path 'instancepath' '.*'
   extract_stdout_keyvalue start_pid 'pid' '[0-9]\+'
   assert [ "$start_instance_path" = "$SERVALINSTANCE_PATH" ]
   assert [ "$servald_pid" = "$start_pid" ]
}

doc_StartTwice="Attempt to start the server twice at the same time"
setup_StartTwice() {
   setup
   export SERVALD_SERVER_START_DELAY=2000
   set_instance +A
   executeOk_servald config set debug.io on
}
start_other(){
   start_servald_server
   echo $servald_pid > other_pid
}
test_StartTwice() {
   fork %server start_other
   start_servald_server
   fork_wait %server
   # both servald start commands should return success with the same PID
   assertGrep other_pid "^$servald_pid$"
   stop_servald_server
   assert_no_servald_processes
}

doc_RemovePid="Server stops when pid file removed"
setup_RemovePid() {
   setup
   # Set a watchdog alarm to ensure that the daemon wakes regularly, so the
   # pidfile is checked quickly, otherwise the daemon will wait 30 seconds
   # before waking itself to check.
   >watchdog
   chmod 0550 watchdog
   executeOk_servald config \
      set log.console.level debug \
      set log.console.show_time true \
      set log.console.show_pid true \
      set debug.io true \
      set debug.watchdog on \
      set server.watchdog.executable "$PWD/watchdog" \
      set server.watchdog.interval_ms 100
   start_servald_server
}
test_RemovePid() {
   rm $instance_servald_pidfile
   wait_until ! kill -0 $servald_pid 2>/dev/null
}

doc_MonitorQuit="Server stops due to monitor client disconnection"
setup_MonitorQuit() {
   setup
   start_servald_server
}
test_MonitorQuit() {
   executeOk_servald console < <(sleep 1 && echo "monitor quit" && sleep 1)
   tfw_cat --stdout --stderr
   wait_until ! kill -0 $servald_pid 2>/dev/null
}

doc_NoZombie="Server process does not become a zombie"
setup_NoZombie() {
   setup
   export SERVALD_START_POST_SLEEP=10000
   servald_start &
   start_pid=$!
   wait_until get_servald_server_pidfile servald_pid
   assert kill -0 $start_pid
}
test_NoZombie() {
   tfw_log "Before kill -KILL $servald_pid"
   ps -l $start_pid $servald_pid
   assert kill -KILL $servald_pid
   tfw_log "After kill -KILL $servald_pid"
   ps -l $start_pid $servald_pid
   wait_until --timeout=2 ! kill -0 $servald_pid 2>/dev/null
   tfw_log "After waiting"
   ps -l $start_pid $servald_pid
   assert --message="zombie servald process does not exist" ! kill -0 $servald_pid 2>/dev/null
}
teardown_NoZombie() {
   kill -TERM $start_pid
   kill_all_servald_processes
   assert_no_servald_processes
}

doc_ServerWatchdog="Server process invokes watchdog periodically"
setup_ServerWatchdog() {
   cat >watchdog <<EOF
#!/bin/sh
date >> $PWD/trace
EOF
   chmod 0550 watchdog
   >trace
   setup
   executeOk_servald config \
      set log.console.level debug \
      set log.console.show_pid true \
      set debug.watchdog on \
      set server.watchdog.executable "$PWD/watchdog" \
      set server.watchdog.interval_ms 100
   start_servald_server
}
test_ServerWatchdog() {
   wait_until --sleep=0.1 --timeout=15 line_count_at_least trace 10
   stop_servald_server
   assert_servald_server_no_errors
}
line_count_at_least() {
   local file="$1"
   local lines="$2"
   [ $(wc -l <"$file") -ge "$lines" ]
}

doc_ReloadConfigAuto="Server automatically reloads configuration"
setup_ReloadConfigAuto() {
   cat >watchdog1 <<EOF
#!/bin/sh
date >> $PWD/trace1
EOF
   cat >watchdog2 <<EOF
#!/bin/sh
date >> $PWD/trace2
EOF
   chmod 0550 watchdog1 watchdog2
   >trace1
   >trace2
   setup
   executeOk_servald config \
      set log.console.level debug \
      set log.console.show_time true \
      set log.console.show_pid true \
      set debug.watchdog on \
      set server.watchdog.executable "$PWD/watchdog1" \
      set server.watchdog.interval_ms 100
   start_servald_server
}
test_ReloadConfigAuto() {
   wait_until --sleep=0.5 --timeout=15 line_count_at_least trace1 3
   assert [ $(wc -l <trace2) -eq 0 ]
   executeOk_servald config \
      set server.watchdog.executable "$PWD/watchdog2"
   tfw_cat --stderr
   wait_until --sleep=0.5 --timeout=15 line_count_at_least trace2 3
   stop_servald_server
   assert_servald_server_no_errors
}

doc_ReloadConfigSync="Server configuration sync"
setup_ReloadConfigSync() {
   cat >watchdog1 <<EOF
#!/bin/sh
date >> $PWD/trace1
EOF
   cat >watchdog2 <<EOF
#!/bin/sh
date >> $PWD/trace2
EOF
   chmod 0550 watchdog1 watchdog2
   >trace1
   >trace2
   setup
   executeOk_servald config \
      set log.console.level debug \
      set log.console.show_time true \
      set log.console.show_pid true \
      set debug.config on \
      set debug.watchdog on \
      set debug.mdprequests on \
      set server.config_reload_interval_ms 600000 \
      set server.watchdog.executable "$PWD/watchdog1" \
      set server.watchdog.interval_ms 100
   start_servald_server
}
test_ReloadConfigSync() {
   wait_until --sleep=0.5 --timeout=15 line_count_at_least trace1 10
   assert [ $(wc -l <trace2) -eq 0 ]
   executeOk_servald config set server.watchdog.executable "$PWD/watchdog2"
   tfw_cat --stderr
   >trace1
   wait_until --sleep=0.5 --timeout=15 line_count_at_least trace1 3
   assert [ $(wc -l <trace2) -eq 0 ]
   executeOk_servald config sync
   tfw_cat --stderr
   >trace1
   wait_until --sleep=0.5 --timeout=15 line_count_at_least trace2 3
   assert [ $(wc -l <trace1) -eq 0 ]
   stop_servald_server
   assert_servald_server_no_errors
}

doc_ReloadConfigSetSync="Server configuration always syncs after set"
setup_ReloadConfigSetSync() {
   setup_curl 7
   setup
   set_instance +A
   create_single_identity
   executeOk_servald config \
      set log.console.level debug \
      set log.console.show_time true \
      set log.console.show_pid true \
      set debug.config on \
      set debug.mdprequests on \
      set server.config_reload_interval_ms 600000 \
      set server.motd "Abcdef"
   start_servald_server
   get_servald_http_server_port PORTA +A
   conf_size=$(wc -l <"$SERVALINSTANCE_PATH/serval.conf")
   assert [ "$conf_size" -gt 0 ]
}
test_ReloadConfigSetSync() {
   # Set the MOTD without changing the config file size and sync it, and the
   # HTTP server returns it in the root page immediately.
   executeOk_servald config set server.motd "Yoicks" sync
   tfw_cat --stderr
   assert [ $conf_size -eq $(wc -l <"$SERVALINSTANCE_PATH/serval.conf") ]
   executeOk curl \
         --silent --fail --show-error \
         --output root.html \
         --dump-header http.headers \
         "http://$addr_localhost:$PORTA/"
   assertGrep root.html Yoicks
   # Set the MOTD without changing the config file size but do not sync it, and
   # the HTTP server still returns the prior value of the MOTD.
   executeOk_servald config set server.motd "Flarng"
   tfw_cat --stderr
   assert [ $conf_size -eq $(wc -l <"$SERVALINSTANCE_PATH/serval.conf") ]
   executeOk curl \
         --silent --fail --show-error \
         --output root.html \
         --dump-header http.headers \
         "http://$addr_localhost:$PORTA/"
   assertGrep root.html Yoicks
   # Sync the config to the daemon, and now the HTTP server returns the new
   # MOTD.
   executeOk_servald config sync
   executeOk curl \
         --silent --fail --show-error \
         --output root.html \
         --dump-header http.headers \
         "http://$addr_localhost:$PORTA/"
   assertGrep root.html Flarng
   stop_servald_server
   assert_servald_server_no_errors
}

runTests "$@"