app: tests: Add unit tests changes for updatable MCUboot

Unit test changes.

Signed-off-by: Markus Lassila <markus.lassila@nordicsemi.no>

Author: MarkusLassila

app/tests/at_commands/CMakeLists.txt

@@ -61,6 +61,7 @@ target_sources(app PRIVATE
   ../stubs/sm_at_host_stubs.c
   ../stubs/control_pin_stubs.c
   ../stubs/pm_stubs.c
+  ../stubs/tfm_stubs.c
   ../stubs/at_cmd_custom_stubs.c
   ../stubs/sm_workq.c
   ../../src/sm_util.c

app/tests/at_commands/include/fw_info.h

@@ -0,0 +1,16 @@
+/*
+ * Copyright (c) 2026 Nordic Semiconductor ASA
+ *
+ * SPDX-License-Identifier: LicenseRef-Nordic-5-Clause
+ */
+
+#ifndef FW_INFO_H__
+#define FW_INFO_H__
+
+#include <stdint.h>
+
+struct fw_info {
+	uint32_t version;
+};
+
+#endif /* FW_INFO_H__ */

app/tests/at_commands/include/pm_config.h

@@ -0,0 +1,13 @@
+/*
+ * Copyright (c) 2026 Nordic Semiconductor ASA
+ *
+ * SPDX-License-Identifier: LicenseRef-Nordic-5-Clause
+ */
+
+#ifndef PM_CONFIG_H__
+#define PM_CONFIG_H__
+
+#define PM_S0_ADDRESS 0x10000
+#define PM_S1_ADDRESS 0x20000
+
+#endif /* PM_CONFIG_H__ */

app/tests/at_commands/include/tfm/tfm_ioctl_api.h

@@ -0,0 +1,20 @@
+/*
+ * Copyright (c) 2026 Nordic Semiconductor ASA
+ *
+ * SPDX-License-Identifier: LicenseRef-Nordic-5-Clause
+ */
+
+#ifndef TFM_IOCTL_API_H__
+#define TFM_IOCTL_API_H__
+
+#include <stdbool.h>
+#include <stdint.h>
+#include <fw_info.h>
+
+/** Check if S0 is the active MCUboot slot. */
+int tfm_platform_s0_active(uint32_t s0_address, uint32_t s1_address, bool *s0_active);
+
+/** Read firmware info from a given address. */
+int tfm_platform_firmware_info(uint32_t fw_address, struct fw_info *info);
+
+#endif /* TFM_IOCTL_API_H__ */

app/tests/at_commands/src/nrf_modem_at_wrapper.c

@@ -28,6 +28,7 @@ extern int handle_at_datactrl_wrapper_xdatactrl(char *buf, size_t len, char *at_
 extern int handle_at_clac_wrapper_xclac(char *buf, size_t len, char *at_cmd);
 extern int handle_ate0_wrapper_ate0(char *buf, size_t len, char *at_cmd);
 extern int handle_ate1_wrapper_ate1(char *buf, size_t len, char *at_cmd);
+extern int handle_at_xbootinfo_wrapper_xbootinfo(char *buf, size_t len, char *at_cmd);
 
 int nrf_modem_at_cmd(void *buf, size_t buf_size, const char *fmt, ...)
 {
@@ -60,6 +61,8 @@ int nrf_modem_at_cmd(void *buf, size_t buf_size, const char *fmt, ...)
 		ret = handle_ate0_wrapper_ate0((char *)buf, buf_size, at_cmd);
 	} else if (strncasecmp(at_cmd, "ATE1", 4) == 0) {
 		ret = handle_ate1_wrapper_ate1((char *)buf, buf_size, at_cmd);
+	} else if (strncasecmp(at_cmd, "AT#XBOOTINFO", 12) == 0) {
+		ret = handle_at_xbootinfo_wrapper_xbootinfo((char *)buf, buf_size, at_cmd);
 	} else {
 		/* Unknown command - return error */
 		ret = -NRF_EINVAL;

app/tests/at_commands/src/test_at_commands.c

@@ -294,6 +294,63 @@ void test_ate_echo_control(void)
 	TEST_ASSERT_TRUE(strstr(response, "OK") != NULL);
 }
 
+/*
+ * Test: AT#XBOOTINFO=0 - query MCUboot version
+ * Stub reports firmware version 0, so response should indicate version 0.
+ */
+void test_xbootinfo_version(void)
+{
+	const char *response;
+
+	send_at_command("AT#XBOOTINFO=0\r\n");
+
+	response = get_captured_response();
+	TEST_ASSERT_TRUE(strstr(response, "#XBOOTINFO: 0") != NULL);
+	TEST_ASSERT_TRUE(strstr(response, "OK") != NULL);
+}
+
+/*
+ * Test: AT#XBOOTINFO=1 - query active MCUboot slot
+ * Stub reports S0 active, so response should indicate slot 0.
+ */
+void test_xbootinfo_slot(void)
+{
+	const char *response;
+
+	send_at_command("AT#XBOOTINFO=1\r\n");
+
+	response = get_captured_response();
+	TEST_ASSERT_TRUE(strstr(response, "#XBOOTINFO: 0") != NULL);
+	TEST_ASSERT_TRUE(strstr(response, "OK") != NULL);
+}
+
+/*
+ * Test: AT#XBOOTINFO=2 - invalid op, should return error
+ */
+void test_xbootinfo_invalid_op(void)
+{
+	const char *response;
+
+	send_at_command("AT#XBOOTINFO=2\r\n");
+
+	response = get_captured_response();
+	TEST_ASSERT_TRUE(strstr(response, "ERROR") != NULL);
+}
+
+/*
+ * Test: AT#XBOOTINFO=? - test command syntax
+ */
+void test_xbootinfo_test(void)
+{
+	const char *response;
+
+	send_at_command("AT#XBOOTINFO=?\r\n");
+
+	response = get_captured_response();
+	TEST_ASSERT_TRUE(strstr(response, "#XBOOTINFO: (0,1)") != NULL);
+	TEST_ASSERT_TRUE(strstr(response, "OK") != NULL);
+}
+
 extern int unity_main(void);
 
 int main(void)

app/tests/at_socket/CMakeLists.txt

@@ -65,6 +65,7 @@ target_sources(app PRIVATE
   ../stubs/sm_at_host_stubs.c
   ../stubs/control_pin_stubs.c
   ../stubs/pm_stubs.c
+  ../stubs/tfm_stubs.c
   ../stubs/at_cmd_custom_stubs.c
   ../stubs/sm_workq.c
   ../../src/sm_util.c

app/tests/at_socket/include/fw_info.h

@@ -0,0 +1,16 @@
+/*
+ * Copyright (c) 2026 Nordic Semiconductor ASA
+ *
+ * SPDX-License-Identifier: LicenseRef-Nordic-5-Clause
+ */
+
+#ifndef FW_INFO_H__
+#define FW_INFO_H__
+
+#include <stdint.h>
+
+struct fw_info {
+	uint32_t version;
+};
+
+#endif /* FW_INFO_H__ */

app/tests/at_socket/include/pm_config.h

@@ -0,0 +1,13 @@
+/*
+ * Copyright (c) 2026 Nordic Semiconductor ASA
+ *
+ * SPDX-License-Identifier: LicenseRef-Nordic-5-Clause
+ */
+
+#ifndef PM_CONFIG_H__
+#define PM_CONFIG_H__
+
+#define PM_S0_ADDRESS 0x10000
+#define PM_S1_ADDRESS 0x20000
+
+#endif /* PM_CONFIG_H__ */

app/tests/at_socket/include/tfm/tfm_ioctl_api.h

@@ -0,0 +1,20 @@
+/*
+ * Copyright (c) 2026 Nordic Semiconductor ASA
+ *
+ * SPDX-License-Identifier: LicenseRef-Nordic-5-Clause
+ */
+
+#ifndef TFM_IOCTL_API_H__
+#define TFM_IOCTL_API_H__
+
+#include <stdbool.h>
+#include <stdint.h>
+#include <fw_info.h>
+
+/** Check if S0 is the active MCUboot slot. */
+int tfm_platform_s0_active(uint32_t s0_address, uint32_t s1_address, bool *s0_active);
+
+/** Read firmware info from a given address. */
+int tfm_platform_firmware_info(uint32_t fw_address, struct fw_info *info);
+
+#endif /* TFM_IOCTL_API_H__ */