suit: Add flash_ipuc pseudo-driver tests

Add tests for the pseudo-flash driver that writes data through SUIT
IPUC.

Ref: NCSDK-30809

Signed-off-by: Tomasz Chyrowicz <tomasz.chyrowicz@nordicsemi.no>

Author: tomchy

.github/test-spec.yml

@@ -150,6 +150,7 @@
   - "subsys/pcd/*"
   - "subsys/net/lib/*fota*/**/*"
   - "subsys/net/lib/downloader/**/*"
+  - "tests/drivers/flash/flash_ipuc/**/*"
   - "tests/subsys/bootloader/**/*"
   - "tests/subsys/dfu/**/*"
 

CODEOWNERS

@@ -801,6 +801,7 @@
 /tests/crypto/                            @stephen-nordic @magnev
 /tests/drivers/audio/pdm_loopback/        @nrfconnect/ncs-low-level-test
 /tests/drivers/gpio/                      @nrfconnect/ncs-low-level-test @nrfconnect/ncs-ll-ursus
+/tests/drivers/flash/flash_ipuc/          @nrfconnect/ncs-charon
 /tests/drivers/flash/flash_rpc/           @nrfconnect/ncs-pluto
 /tests/drivers/flash_patch/               @nrfconnect/ncs-pluto
 /tests/drivers/fprotect/                  @nrfconnect/ncs-pluto

tests/drivers/flash/flash_ipuc/CMakeLists.txt

@@ -0,0 +1,25 @@
+#
+# Copyright (c) 2025 Nordic Semiconductor ASA
+#
+# SPDX-License-Identifier: LicenseRef-Nordic-5-Clause
+#
+
+cmake_minimum_required(VERSION 3.20.0)
+
+find_package(Zephyr REQUIRED HINTS $ENV{ZEPHYR_BASE})
+
+project(flash_ipuc)
+
+target_include_directories(app PRIVATE ${ZEPHYR_NRF_MODULE_DIR}/subsys/suit/ipuc/include)
+target_include_directories(app PRIVATE mocks)
+
+zephyr_compile_definitions(CONFIG_FLASH_IPUC_COUNT=2)
+zephyr_compile_definitions(CONFIG_FLASH_IPUC_LOG_LEVEL)
+zephyr_compile_definitions(CONFIG_FLASH_IPUC_LOG_LEVEL_DBG)
+# Pretend to call API as nRF54H20 application FW
+zephyr_compile_definitions(CONFIG_SOC_NRF54H20_CPUAPP)
+
+target_sources(app PRIVATE
+  src/main.c
+  ${ZEPHYR_NRF_MODULE_DIR}/drivers/flash/flash_ipuc/flash_ipuc.c
+)

tests/drivers/flash/flash_ipuc/boards/native_sim.conf

@@ -0,0 +1,8 @@
+#
+# Copyright (c) 2025 Nordic Semiconductor ASA
+#
+# SPDX-License-Identifier: LicenseRef-Nordic-5-Clause
+#
+
+CONFIG_FLASH_SIMULATOR=y
+CONFIG_FLASH_SIMULATOR_DOUBLE_WRITES=y

tests/drivers/flash/flash_ipuc/boards/native_sim_64.conf

@@ -0,0 +1,8 @@
+#
+# Copyright (c) 2025 Nordic Semiconductor ASA
+#
+# SPDX-License-Identifier: LicenseRef-Nordic-5-Clause
+#
+
+CONFIG_FLASH_SIMULATOR=y
+CONFIG_FLASH_SIMULATOR_DOUBLE_WRITES=y

tests/drivers/flash/flash_ipuc/mocks/mock_suit_ipuc.h

@@ -0,0 +1,29 @@
+/*
+ * Copyright (c) 2025 Nordic Semiconductor ASA
+ *
+ * SPDX-License-Identifier: LicenseRef-Nordic-5-Clause
+ */
+
+#ifndef MOCK_SUIT_IPUC_H__
+#define MOCK_SUIT_IPUC_H__
+
+#include <suit_ipuc.h>
+#include <zephyr/fff.h>
+
+DEFINE_FFF_GLOBALS;
+
+FAKE_VALUE_FUNC(int, suit_ipuc_get_count, size_t *);
+FAKE_VALUE_FUNC(int, suit_ipuc_get_info, size_t, struct zcbor_string *, suit_manifest_role_t *);
+FAKE_VALUE_FUNC(int, suit_ipuc_write_setup, struct zcbor_string *, struct zcbor_string *,
+		struct zcbor_string *);
+FAKE_VALUE_FUNC(int, suit_ipuc_write, struct zcbor_string *, size_t, uintptr_t, size_t, bool);
+
+static inline void mock_suit_ipuc_reset(void)
+{
+	RESET_FAKE(suit_ipuc_get_count);
+	RESET_FAKE(suit_ipuc_get_info);
+	RESET_FAKE(suit_ipuc_write_setup);
+	RESET_FAKE(suit_ipuc_write);
+}
+
+#endif /* MOCK_SUIT_IPUC_H__ */

tests/drivers/flash/flash_ipuc/prj.conf

@@ -0,0 +1,15 @@
+#
+# Copyright (c) 2025 Nordic Semiconductor ASA
+#
+# SPDX-License-Identifier: LicenseRef-Nordic-5-Clause
+#
+
+CONFIG_ZTEST=y
+CONFIG_SUIT=y
+CONFIG_SUIT_UTILS=y
+CONFIG_SUIT_METADATA=y
+
+CONFIG_ZCBOR=y
+CONFIG_ZCBOR_CANONICAL=y
+
+CONFIG_FLASH=y