[nrf fromlist] tests: subsys: logging: Test with CONFIG_LOG disabled

Developer reports build error when he uses LOG_RAW in his code
and disables logging in prj.conf using CONFIG_LOG=n.

Add test case for above described scenario.

Upstream PR #: 85383

Signed-off-by: Sebastian Głąb <[email protected]>

Author: nordic-segl

tests/subsys/logging/log_disabled/CMakeLists.txt

@@ -0,0 +1,13 @@
+#
+# Copyright (c) 2025 Nordic Semiconductor ASA
+#
+# SPDX-License-Identifier: Apache-2.0
+#
+
+cmake_minimum_required(VERSION 3.20.0)
+
+find_package(Zephyr REQUIRED HINTS $ENV{ZEPHYR_BASE})
+
+project(log_disable)
+
+target_sources(app PRIVATE src/main.c)

tests/subsys/logging/log_disabled/prj.conf

@@ -0,0 +1,2 @@
+CONFIG_PRINTK=y
+CONFIG_LOG=n

tests/subsys/logging/log_disabled/src/main.c

@@ -0,0 +1,36 @@
+/*
+ * Copyright (c) 2025 Nordic Semiconductor ASA
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+#include <zephyr/kernel.h>
+#include <zephyr/logging/log.h>
+
+LOG_MODULE_REGISTER(app, LOG_LEVEL_DBG);
+
+int main(void)
+{
+	uint8_t data[] = {0, 1, 2, 3};
+
+	LOG_DBG("Debug log");
+	LOG_INF("Info log");
+	LOG_WRN("Warning log");
+	LOG_ERR("Error log");
+
+	for (int i = 0; i < 10; i++) {
+		LOG_WRN_ONCE("Warning on the first execution only");
+	}
+
+	LOG_PRINTK("Printk log\n");
+
+	LOG_RAW("Raw log\n");
+
+	LOG_HEXDUMP_DBG(data, sizeof(data), "Debug data");
+	LOG_HEXDUMP_INF(data, sizeof(data), "Info data");
+	LOG_HEXDUMP_WRN(data, sizeof(data), "Warning data");
+	LOG_HEXDUMP_ERR(data, sizeof(data), "Error data");
+
+	printk("All done.\n");
+	return 0;
+}

tests/subsys/logging/log_disabled/testcase.yaml

@@ -0,0 +1,17 @@
+common:
+  tags:
+    - logging
+  build_only: true
+  harness: console
+  harness_config:
+    type: one_line
+    regex:
+      - "All done."
+
+tests:
+  logging.log_disable:
+    platform_allow:
+      - nrf5340dk/nrf5340/cpunet
+      - nrf54l15dk/nrf54l15/cpuapp
+    integration_platforms:
+      - nrf5340dk/nrf5340/cpunet