ci: cram: wifi-usp.t: add pwhm usp events check

This commit adds a test to verify that USP events are raised through
the pwhm USP direct socket

Closes: PPW-1259
References: PPW-1208

Signed-off-by: Houssem Dafdouf <houssem.dafdouf_ext@softathome.com>
(cherry picked from commit d8602b0e1e)

.gitlab/tests/cram/generic/wifi-usp.t

@@ -1,6 +1,8 @@
 Create R alias:
 
   $ alias R="${CRAM_REMOTE_COMMAND:-}"
+  $ alias C="${CRAM_REMOTE_COPY:-}"
+  $ C ${TESTDIR}/../scripts/target/pwhm-usp-events.lua root@${TARGET_LAN_IP}:/tmp/event.lua 2>/dev/null
 
   $ R logger -t cram "Starting pwhm direct USP socket test ..."
 
@@ -14,4 +16,29 @@ Check if there is at least one connected client (should be beerocks processes):
   $ R "netstat -ap 2>/dev/null | grep 'CONNECTED.*pwhm_usp.sock'| wc -l"
   [1-9]$ (re)
 
+Test USP events:
+
+  $ R "lua /tmp/event.lua 'Device.WiFi.AccessPoint.1.Enable!' 'dm:object-changed' > /tmp/pwhm_usp_events &"
+
+  $ R "ba-cli WiFi.AccessPoint.1.Enable=1" > /dev/null 2>&1
+
+  $ sleep 5
+
+  $ R "cat /tmp/pwhm_usp_events"
+  Event dm:object-changed
+  {
+      object = "Device.WiFi.AccessPoint.1.",
+      parameters = {
+          Enable = {
+              from = "",
+              to = "true"
+          }
+      },
+      path = "Device.WiFi.AccessPoint.1."
+  }
+
+  $ R "ba-cli WiFi.AccessPoint.1.Enable=0" > /dev/null 2>&1
+
+  $ sleep 5
+
   $ R logger -t cram "Test finished!"

.gitlab/tests/cram/scripts/target/pwhm-usp-events.lua

@@ -0,0 +1,32 @@
+#!/usr/bin/lua
+
+local req_object = arg[1]
+local req_event = arg[2]
+local lamx = require 'lamx'
+
+local usp_backend_config = {
+    usp = {
+        EndpointID = 'proto::local_controller'
+    }
+}
+
+lamx.backend.load("/usr/bin/mods/usp/mod-amxb-usp.so")
+lamx.backend.push_config(usp_backend_config)
+lamx.bus.open("usp:/var/run/pwhm_usp.sock")
+
+local el = lamx.eventloop.new()
+local print_event = function(event, data)
+  if event == req_event then
+    print("Event " .. event)
+    table.dump(data)
+    el:stop()
+  end
+end
+
+local sub = lamx.bus.subscribe(req_object, print_event);
+
+el:start()
+
+--lamx.bus.ubsubscribe(sub)
+
+lamx.backend.remove("usp")