Adds testing facility for periodic checks

scripts/lua/modules/test/test_utils.lua

@@ -0,0 +1,33 @@
+--
+-- (C) 2017-18 - ntop.org
+--
+
+local test_utils = {}
+
+local function test_error(msg)
+   interface.storeAlert(alertEntity("test"), "test",
+    			alertType("test_failed"), alertSeverity("error"), msg)
+end
+
+local function test_assert(cond, error_msg)
+   if not cond then
+      test_error(error_msg)
+   end
+end
+
+function test_utils.check_alerts(ifid, working_status)
+   local if_stats = interface.getStats()
+   if working_status.granularity == "min" then
+      -- minute checks
+      test_assert(if_stats.stats.hosts > 0, string.format("No host detected. [hosts: %d]", if_stats.stats.hosts))
+      test_assert(if_stats.stats.flows > 0, string.format("No flow detected. [flows: %d]", if_stats.stats.flows))
+   elseif working_status.granularity == "5mins" then
+      -- 5-minute checks
+   elseif working_status.granularity == "hour" then
+      -- hourly checks
+   elseif working_status.granularity == "day" then
+      -- daily checks
+   end
+end
+
+return test_utils