Add test on rate limiter max resource decrease update

Author: kthui

qa/L0_model_update/instance_update_test.py

@@ -338,10 +338,10 @@ def test_infer_while_updating(self):
         # Unload model
         self.__unload_model()
 
-    # Test instance resource requirement increase
+    # Test instance resource requirement update
     @unittest.skipUnless(os.environ["RATE_LIMIT_MODE"] == "execution_count",
                          "Rate limiter precondition not met for this test")
-    def test_instance_resource_increase(self):
+    def test_instance_resource_update(self):
         # Load model
         self.__load_model(
             1,
@@ -365,6 +365,20 @@ def infer():
             time.sleep(infer_count / 2)  # each infer should take < 0.5 seconds
             self.assertNotIn(False, infer_complete, "Infer possibly stuck")
             infer_thread.result()
+        # Decrease the resource requirement
+        self.__update_instance_count(
+            1, 1,
+            "{\ncount: 1\nkind: KIND_CPU\nrate_limiter {\nresources [\n{\nname: \"R1\"\ncount: 6\n}\n]\n}\n}"
+        )
+        # Further decrease the resource requirement. The previous decrease
+        # should have lower the max resource in the rate limiter, which the
+        # error "Should not print this ..." should not be printed into the
+        # server log because the max resource is above the previously set limit
+        # and it will be checked by the main bash test script.
+        self.__update_instance_count(
+            1, 1,
+            "{\ncount: 1\nkind: KIND_CPU\nrate_limiter {\nresources [\n{\nname: \"R1\"\ncount: 4\n}\n]\n}\n}"
+        )
         # Unload model
         self.__unload_model()
 

qa/L0_model_update/test.sh

@@ -83,6 +83,15 @@ for RATE_LIMIT_MODE in "off" "execution_count"; do
     kill $SERVER_PID
     wait $SERVER_PID
 
+    set +e
+    grep "Should not print this" $SERVER_LOG
+    if [ $? -eq 0 ]; then
+        echo -e "\n***\n*** Found \"Should not print this\" on \"$SERVER_LOG\"\n***"
+        cat $SERVER_LOG
+        RET=1
+    fi
+    set -e
+
 done
 
 if [ $RET -eq 0 ]; then