tests: bluetooth: mesh: test lpn communication after friendship

Commit extends the communication test between the LPN and
the third mesh device by checking that LPN and the third mesh
device can exchange data normally after friendship termination.

Signed-off-by: Aleksandr Khromykh <aleksandr.khromykh@nordicsemi.no>

Author: alxelax

tests/bsim/bluetooth/mesh/compile.sh

@@ -18,6 +18,7 @@ app=tests/bsim/bluetooth/mesh conf_overlay=overlay_low_lat.conf compile
 app=tests/bsim/bluetooth/mesh conf_overlay=overlay_psa.conf compile
 app=tests/bsim/bluetooth/mesh conf_overlay=overlay_workq_sys.conf compile
 app=tests/bsim/bluetooth/mesh conf_overlay=overlay_multi_adv_sets.conf compile
+app=tests/bsim/bluetooth/mesh conf_overlay=overlay_lpn_scan_on.conf compile
 app=tests/bsim/bluetooth/mesh \
   conf_overlay="overlay_pst.conf;overlay_ss.conf;overlay_psa.conf" compile
 app=tests/bsim/bluetooth/mesh conf_overlay="overlay_gatt.conf;overlay_psa.conf" compile

tests/bsim/bluetooth/mesh/overlay_lpn_scan_on.conf

@@ -0,0 +1 @@
+CONFIG_BT_MESH_LPN_ESTABLISHMENT=n

tests/bsim/bluetooth/mesh/src/test_friendship.c

@@ -537,23 +537,23 @@ static void test_lpn_msg_mesh(void)
 	bt_mesh_test_friendship_init(CONFIG_BT_MESH_FRIEND_LPN_COUNT);
 	bt_mesh_lpn_set(true);
 
-	ASSERT_OK_MSG(bt_mesh_test_friendship_evt_wait(BT_MESH_TEST_LPN_ESTABLISHED,
-						       K_SECONDS(2)), "LPN not established");
+	ASSERT_OK_MSG(bt_mesh_test_friendship_evt_wait(BT_MESH_TEST_LPN_ESTABLISHED, K_SECONDS(2)),
+		      "LPN did not establish friendship");
 	/* LPN polls on establishment. Clear the poll state */
 	bt_mesh_test_friendship_evt_clear(BT_MESH_TEST_LPN_POLLED);
 
 	/* Send an unsegmented message to a third mesh node.
 	 * Should not be affected by the LPN mode at all.
 	 */
 	ASSERT_OK_MSG(bt_mesh_test_send(other_cfg.addr, NULL, 5, 0, K_NO_WAIT),
-		      "Send to mesh failed");
+		      "Send to the third mesh node failed");
 
 	/* Receive an unsegmented message back */
 	ASSERT_OK(bt_mesh_test_recv(5, cfg->addr, NULL, K_FOREVER));
 
 	/* Send a segmented message to the mesh node. */
 	ASSERT_OK_MSG(bt_mesh_test_send(other_cfg.addr, NULL, 15, 0, K_FOREVER),
-		      "Send to other failed");
+		      "Send to the third mesh node failed");
 
 	/* Receive a segmented message back */
 	ASSERT_OK(bt_mesh_test_recv(15, cfg->addr, NULL, K_FOREVER));
@@ -569,6 +569,25 @@ static void test_lpn_msg_mesh(void)
 	bt_mesh_model_msg_init(test_model->pub->msg, TEST_MSG_OP_1);
 	ASSERT_OK(bt_mesh_model_publish(test_model));
 
+	/* Give time to complete publication */
+	k_sleep(K_SECONDS(2));
+
+	/* Terminate friendship by disabling the LPN functionality */
+	bt_mesh_lpn_set(false);
+	ASSERT_OK_MSG(bt_mesh_test_friendship_evt_wait(BT_MESH_TEST_LPN_TERMINATED, K_SECONDS(5)),
+		      "LPN did not terminate friendship correctly");
+
+	/* With this enabled feature, LPN leaves scanner disabled after termination. */
+	if (IS_ENABLED(CONFIG_BT_MESH_LPN_ESTABLISHMENT)) {
+		bt_mesh_scan_enable();
+	}
+
+	/* Send an unsegmented message to a third mesh node. */
+	ASSERT_OK_MSG(bt_mesh_test_send(other_cfg.addr, NULL, 5, 0, K_NO_WAIT),
+		      "Send to the third mesh node failed");
+	/* Receive an unsegmented message back */
+	ASSERT_OK(bt_mesh_test_recv(5, cfg->addr, NULL, K_FOREVER));
+
 	PASS();
 }
 
@@ -587,9 +606,9 @@ static void test_lpn_re_est(void)
 			      "LPN not established");
 
 		bt_mesh_lpn_set(false);
-		ASSERT_OK_MSG(bt_mesh_test_friendship_evt_wait(BT_MESH_TEST_LPN_TERMINATED,
-							       K_SECONDS(5)),
-			      "LPN never terminated friendship");
+		ASSERT_OK_MSG(
+			bt_mesh_test_friendship_evt_wait(BT_MESH_TEST_LPN_TERMINATED, K_SECONDS(5)),
+			"LPN did not terminate friendship correctly");
 
 		k_sleep(K_SECONDS(2));
 	}
@@ -966,6 +985,13 @@ static void test_other_msg(void)
 	ASSERT_OK_MSG(bt_mesh_test_recv(1, cfg->addr, NULL, K_FOREVER),
 		      "Failed to receive from LPN");
 
+	/* Receive an unsegmented message from the LPN outside of friendship. */
+	ASSERT_OK_MSG(bt_mesh_test_recv(5, cfg->addr, NULL, K_FOREVER),
+		      "Failed to receive from LPN after friendship termination");
+	/* Send an unsegmented message to the LPN */
+	ASSERT_OK_MSG(bt_mesh_test_send(LPN_ADDR_START, NULL, 5, 0, K_NO_WAIT),
+		      "Failed to send to LPN after friendship termination");
+
 	PASS();
 }
 

tests/bsim/bluetooth/mesh/tests_scripts/friendship/msg_mesh.sh

@@ -4,12 +4,28 @@
 
 source $(dirname "${BASH_SOURCE[0]}")/../../_mesh_test.sh
 
-# Test communication between the LPN and a third mesh device
+# Test communication between the LPN and a third mesh device.
+# Test scenario:
+# 1. LPN and Friend establish friendship.
+# 2. LPN sends unsegmented data to the third mesh device and receives unsegmented data back.
+# 3. LPN sends segmented data to the third mesh device and receives segmented data back.
+# 4. LPN publishes unsegmented data to the third device with friendship credentials.
+#    Friend should relay data to the third device with network credentials.
+#    The third mesh receives published data.
+# 5. LPN terminates friendship  and gets an event about termination.
+# 6. LPN sends unsegmented data to the third device outside of friendship and
+#    receives unsegmented data back.
 RunTest mesh_friendship_msg_mesh \
 	friendship_lpn_msg_mesh \
 	friendship_other_msg \
 	friendship_friend_est
 
+overlay=overlay_lpn_scan_on_conf
+RunTest mesh_friendship_msg_mesh_lpn_scan_on \
+	friendship_lpn_msg_mesh \
+	friendship_other_msg \
+	friendship_friend_est
+
 overlay=overlay_psa_conf
 RunTest mesh_friendship_msg_mesh_psa \
 	friendship_lpn_msg_mesh \