Fix up single run test

Enable reasonable default if resp size not specified

test/cpp/qps/qps_driver.cc

@@ -108,7 +108,10 @@ static void QpsDriver() {
       params->set_req_size(FLAGS_simple_req_size);
     }
   } else {
-    GPR_ASSERT(false);  // not yet implemented
+    // choose a reasonable default
+    auto params =
+        client_config.mutable_payload_config()->mutable_simple_params();
+    params->set_resp_size(1);
   }
 
   client_config.set_async_client_threads(FLAGS_async_client_threads);

test/cpp/qps/single_run_localhost.sh

@@ -30,35 +30,27 @@
 
 # performs a single qps run with one client and one server
 
-set -
-        ex
+set -ex
 
-                cd
-                $(dirname $0) /
-                    ../../
-                    ..
+cd $(dirname $0)/../../..
 
-                    killall qps_worker
-    || true
+killall qps_worker || true
 
 config=opt
 
-    NUMCPUS =`python2 .7 - c
-             'import multiprocessing; print multiprocessing.cpu_count()'`
+NUMCPUS=`python2.7 -c 'import multiprocessing; print multiprocessing.cpu_count()'`
 
-             make CONFIG = $config qps_worker qps_driver -
-                           j$NUMCPUS
+make CONFIG=$config qps_worker qps_driver -j$NUMCPUS
 
-                               bins
-                               / $config / qps_worker
-                           - driver_port
-                           10000 &PID1 = $ !bins / $config / qps_worker
-                                         - driver_port 10010 &PID2 = $ !
+bins/$config/qps_worker -driver_port 10000 &
+PID1=$!
+bins/$config/qps_worker -driver_port 10010 &
+PID2=$!
 
 export QPS_WORKERS="localhost:10000,localhost:10010"
 
-                             bins
-                             / $config / qps_driver $ *
+bins/$config/qps_driver $*
+
+kill -2 $PID1 $PID2
+wait
 
-                             kill
-                         - 2 $PID1 $PID2 wait