[nrf fromlist] samples: boards: nordic: system_off: add console checking

Basic verification of output.

Upstream PR #: 81706

Signed-off-by: Piotr Kosycarz <[email protected]>

Author: nordic-piks

samples/boards/nordic/system_off/sample.yaml

@@ -4,36 +4,102 @@ common:
   tags: power
 tests:
   sample.boards.nrf.system_off:
-    build_only: true
     integration_platforms:
       - nrf52840dk/nrf52840
     platform_allow:
+      - nrf51dk/nrf51822
+      - nrf52840dk/nrf52840
+      - nrf52dk/nrf52832
+      - nrf5340dk/nrf5340/cpuapp
       - nrf54l15dk/nrf54l05/cpuapp
       - nrf54l15dk/nrf54l10/cpuapp
       - nrf54l15dk/nrf54l15/cpuapp
-      - nrf52840dk/nrf52840
-      - nrf52dk/nrf52832
-      - nrf51dk/nrf51822
+    harness: console
+    harness_config:
+      type: multi_line
+      ordered: true
+      regex:
+        - "system off demo"
+        - "Retained data not supported"
+        - "Entering system off; press sw0 to restart"
   sample.boards.nrf.system_off.nrf_retained:
-    build_only: true
     integration_platforms:
       - nrf52840dk/nrf52840
     platform_allow:
       - nrf52840dk/nrf52840
       - nrf52dk/nrf52832
     extra_configs:
       - CONFIG_APP_USE_NRF_RETENTION=y
+    harness: console
+    harness_config:
+      type: multi_line
+      ordered: true
+      regex:
+        - "system off demo"
+        - "Retained data: INVALID"
+        - "Boot count: 1"
+        - "Off count: 0"
+        - "Active Ticks:"
+        - "Entering system off; press sw0 to restart"
   sample.boards.nrf.system_off.retained_mem:
     extra_args: DTC_OVERLAY_FILE="boards/nrf54l15dk_nrf54l15_cpuapp_retained_mem.overlay"
-    build_only: true
     platform_allow:
       - nrf54l15dk/nrf54l15/cpuapp
     extra_configs:
       - CONFIG_APP_USE_RETAINED_MEM=y
       - CONFIG_RETAINED_MEM=y
+    harness: console
+    harness_config:
+      type: multi_line
+      ordered: true
+      regex:
+        - "system off demo"
+        - "Retained data: INVALID"
+        - "Boot count: 1"
+        - "Off count: 0"
+        - "Active Ticks:"
+        - "Entering system off; press sw0 to restart"
   sample.boards.nrf.system_off.grtc_wakeup:
-    build_only: true
     platform_allow:
       - nrf54l15dk/nrf54l15/cpuapp
     extra_configs:
       - CONFIG_GRTC_WAKEUP_ENABLE=y
+    harness: console
+    harness_config:
+      type: multi_line
+      ordered: true
+      regex:
+        - "system off demo"
+        - "Retained data not supported"
+        - "Entering system off; wait 2 seconds to restart"
+        - "system off demo"
+        - "Retained data not supported"
+        - "Entering system off; wait 2 seconds to restart"
+        - "system off demo"
+        - "Retained data not supported"
+        - "Entering system off; wait 2 seconds to restart"
+  sample.boards.nrf.system_off.retained_mem.grtc_wakeup:
+    extra_args: DTC_OVERLAY_FILE="boards/nrf54l15dk_nrf54l15_cpuapp_retained_mem.overlay"
+    platform_allow:
+      - nrf54l15dk/nrf54l15/cpuapp
+    extra_configs:
+      - CONFIG_APP_USE_RETAINED_MEM=y
+      - CONFIG_GRTC_WAKEUP_ENABLE=y
+      - CONFIG_RETAINED_MEM=y
+    harness: console
+    harness_config:
+      type: multi_line
+      ordered: true
+      regex:
+        - "system off demo"
+        - "Retained data: INVALID"
+        - "Boot count: 1"
+        - "Off count: 0"
+        - "Active Ticks:"
+        - "Entering system off; wait 2 seconds to restart"
+        - "system off demo"
+        - "Retained data: valid"
+        - "Boot count: 2"
+        - "Off count: 1"
+        - "Active Ticks:"
+        - "Entering system off; wait 2 seconds to restart"