test: tidy up arithmetic expressions

test/units/testsuite-03.sh

@@ -18,7 +18,7 @@ grep 'hello\.service.*waiting' /root/list-jobs.txt
 START_SEC=$(date -u '+%s')
 systemctl start --job-mode=ignore-dependencies hello
 END_SEC=$(date -u '+%s')
-ELAPSED=$(($END_SEC-$START_SEC))
+ELAPSED=$((END_SEC-START_SEC))
 
 test "$ELAPSED" -lt 3
 
@@ -76,14 +76,14 @@ EOF
 START_SEC=$(date -u '+%s')
 systemctl start --wait wait2.service
 END_SEC=$(date -u '+%s')
-ELAPSED=$(($END_SEC-$START_SEC))
+ELAPSED=$((END_SEC-START_SEC))
 [[ "$ELAPSED" -ge 2 ]] && [[ "$ELAPSED" -le 4 ]] || exit 1
 
 # wait5fail fails, so systemctl should fail
 START_SEC=$(date -u '+%s')
 systemctl start --wait wait2.service wait5fail.service && { echo 'unexpected success'; exit 1; }
 END_SEC=$(date -u '+%s')
-ELAPSED=$(($END_SEC-$START_SEC))
+ELAPSED=$((END_SEC-START_SEC))
 [[ "$ELAPSED" -ge 5 ]] && [[ "$ELAPSED" -le 7 ]] || exit 1
 
 # Test time-limited scopes
@@ -92,7 +92,7 @@ set +e
 systemd-run --scope --property=RuntimeMaxSec=3s sleep 10
 RESULT=$?
 END_SEC=$(date -u '+%s')
-ELAPSED=$(($END_SEC-$START_SEC))
+ELAPSED=$((END_SEC-START_SEC))
 [[ "$ELAPSED" -ge 3 ]] && [[ "$ELAPSED" -le 5 ]] || exit 1
 [[ "$RESULT" -ne 0 ]] || exit 1
 

test/units/testsuite-41.sh

@@ -12,7 +12,7 @@ systemd-analyze log-target console
 systemd-run --unit=one -p Type=oneshot -p Restart=on-failure /bin/bash -c "exit 1" \
     && { echo 'unexpected success'; exit 1; }
 
-for ((secs=0; secs<$MAX_SECS; secs++)); do
+for ((secs = 0; secs < MAX_SECS; secs++)); do
   [[ "$(systemctl show one.service -P NRestarts)" -le 0 ]] || break
   sleep 1
 done
@@ -35,7 +35,7 @@ systemd-run --unit=two \
     && { echo 'unexpected success'; exit 1; }
 
 # wait for at least 3 restarts
-for ((secs=0; secs<$MAX_SECS; secs++)); do
+for ((secs = 0; secs < MAX_SECS; secs++)); do
   [[ $(cat $TMP_FILE) != "aaa" ]] || break
   sleep 1
 done