load test: Fix argument processing

src/tests/frontend/travis/runnerLoadTest.sh

@@ -8,6 +8,9 @@ error() { log "ERROR: $@" >&2; }
 fatal() { error "$@"; exit 1; }
 try() { "$@" || fatal "'$@' failed"; }
 
+[ -n "$1" ] && [ "$1" -gt 0 ] || fatal "no duration specified"
+[ -n "$2" ] && [ "$2" -gt 0 ] || fatal "no authors specified"
+
 # Move to the Etherpad base directory.
 MY_DIR=$(try cd "${0%/*}" && try pwd -P) || exit 1
 try cd "${MY_DIR}/../../../.."
@@ -19,7 +22,7 @@ s!"points":[^,]*!"points": 1000!
 ' settings.json.template >settings.json
 
 log "Assuming src/bin/installDeps.sh has already been run"
-node src/node/server.js "${@}" >/dev/null &
+node src/node/server.js >/dev/null &
 ep_pid=$!
 
 log "Waiting for Etherpad to accept connections (http://localhost:9001)..."
@@ -46,7 +49,7 @@ sleep 10
 log "Running the load tests..."
 # -d is duration of test, -a is number of authors to test with
 # by specifying the number of authors we set the overall rate of messages
-etherpad-loadtest -d $1 -a $2
+etherpad-loadtest -d "$1" -a "$2"
 exit_code=$?
 
 kill "$ep_pid" && wait "$ep_pid"