tests: cmake: Add sysbuild snippets test

Adds a new test that ensures sysbuild snippets work and are
applied correctly

Signed-off-by: Jamie McCrae <jamie.mccrae@nordicsemi.no>

tests/cmake/sysbuild_snippets/CMakeLists.txt

@@ -0,0 +1,9 @@
+# SPDX-License-Identifier: Apache-2.0
+
+cmake_minimum_required(VERSION 3.20.0)
+
+find_package(Zephyr REQUIRED HINTS $ENV{ZEPHYR_BASE})
+project(test_snippets)
+
+FILE(GLOB app_sources src/*.c)
+target_sources(app PRIVATE ${app_sources})

tests/cmake/sysbuild_snippets/Kconfig

@@ -0,0 +1,13 @@
+# Copyright 2024 Nordic Semiconductor ASA
+# SPDX-License-Identifier: Apache-2.0
+
+menu "Zephyr"
+source "Kconfig.zephyr"
+endmenu
+
+# Test values set by the snippet config overlays and tested by the test logic
+config TEST_FOO_VAL
+	int "Test value"
+	default 12
+	help
+	  This option's value should be overridden by sysbuild.

tests/cmake/sysbuild_snippets/Kconfig.sysbuild

@@ -0,0 +1,22 @@
+# Copyright 2024 Nordic Semiconductor ASA
+# SPDX-License-Identifier: Apache-2.0
+
+config TEST_FOO_VAL
+	int "Test value"
+	default 0
+	help
+	  This option's value should be overridden by the 'foo' snippet config overlay.
+
+config EXPECTED_SB_TEST_FOO_VAL
+	int "Expected sysbuild test value"
+	default 999999
+	help
+	  Expected sysbuild value for the test.
+
+config EXPECTED_APP_TEST_FOO_VAL
+	int "Expected application test value"
+	default 999999
+	help
+	  Expected application value for the test.
+
+source "${ZEPHYR_BASE}/share/sysbuild/Kconfig"

tests/cmake/sysbuild_snippets/prj.conf

@@ -0,0 +1 @@
+CONFIG_ZTEST=y

tests/cmake/sysbuild_snippets/src/main.c

@@ -0,0 +1,7 @@
+/*
+ * Copyright (c) 2024 Nordic Semiconductor ASA
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+/* Empty file */

tests/cmake/sysbuild_snippets/sysbuild/CMakeLists.txt

@@ -0,0 +1,11 @@
+# SPDX-License-Identifier: Apache-2.0
+
+cmake_minimum_required(VERSION 3.20.0)
+
+set(SNIPPET_ROOT "${CMAKE_CURRENT_SOURCE_DIR}")
+set(sysbuild_snippets_SNIPPET_ROOT "${CMAKE_CURRENT_SOURCE_DIR}" CACHE INTERNAL "")
+set(EXTRA_ZEPHYR_MODULES "${CMAKE_CURRENT_SOURCE_DIR}/test_module" CACHE INTERNAL "test_module directory")
+
+find_package(Sysbuild REQUIRED HINTS $ENV{ZEPHYR_BASE})
+
+project(sysbuild LANGUAGES)

tests/cmake/sysbuild_snippets/sysbuild/snippets/foo/app.conf

@@ -0,0 +1 @@
+CONFIG_TEST_FOO_VAL=18382

tests/cmake/sysbuild_snippets/sysbuild/snippets/foo/sb.conf

@@ -0,0 +1 @@
+SB_CONFIG_TEST_FOO_VAL=464372

tests/cmake/sysbuild_snippets/sysbuild/snippets/foo/snippet.yml

@@ -0,0 +1,4 @@
+name: foo
+append:
+  SB_EXTRA_CONF_FILE: sb.conf
+  EXTRA_CONF_FILE: app.conf

tests/cmake/sysbuild_snippets/sysbuild/test_module/CMakeLists.txt

@@ -0,0 +1,24 @@
+# SPDX-License-Identifier: Apache-2.0
+
+function(${SYSBUILD_CURRENT_MODULE_NAME}_post_cmake)
+  ExternalProject_Get_Property(${DEFAULT_IMAGE} BINARY_DIR)
+  import_kconfig(CONFIG_ ${BINARY_DIR}/zephyr/.config)
+
+  if("${SB_CONFIG_TEST_FOO_VAL}" STREQUAL "${CONFIG_TEST_FOO_VAL}")
+    message(FATAL_ERROR "Values match (sysbuild and app): ${SB_CONFIG_TEST_FOO_VAL} and ${CONFIG_TEST_FOO_VAL}")
+  else()
+    message(NOTICE "Values diverge (sysbuild and app)")
+  endif()
+
+  if("${SB_CONFIG_EXPECTED_SB_TEST_FOO_VAL}" STREQUAL "${SB_CONFIG_TEST_FOO_VAL}")
+    message(NOTICE "Values match (sysbuild and snippet): ${SB_CONFIG_EXPECTED_SB_TEST_FOO_VAL} and ${SB_CONFIG_TEST_FOO_VAL}")
+  else()
+    message(FATAL_ERROR "Values diverge (sysbuild and snippet): ${SB_CONFIG_EXPECTED_SB_TEST_FOO_VAL} and ${SB_CONFIG_TEST_FOO_VAL}")
+  endif()
+
+  if("${SB_CONFIG_EXPECTED_APP_TEST_FOO_VAL}" STREQUAL "${CONFIG_TEST_FOO_VAL}")
+    message(NOTICE "Values match (app and snippet): ${SB_CONFIG_EXPECTED_APP_TEST_FOO_VAL} and ${CONFIG_TEST_FOO_VAL}")
+  else()
+    message(FATAL_ERROR "Values diverge (app and snippet): ${SB_CONFIG_EXPECTED_APP_TEST_FOO_VAL} and ${CONFIG_TEST_FOO_VAL}")
+  endif()
+endfunction()

tests/cmake/sysbuild_snippets/sysbuild/test_module/zephyr/module.yml

@@ -0,0 +1,2 @@
+build:
+  sysbuild-cmake: .

tests/cmake/sysbuild_snippets/testcase.yaml

@@ -0,0 +1,20 @@
+common:
+  sysbuild: true
+  tags: sysbuild_snippets sysbuild
+  platform_allow:
+  - native_sim
+  integration_platforms:
+  - native_sim
+
+tests:
+  # Test the initial state with no snippets applied
+  buildsystem.sysbuild.snippets.none:
+    extra_args:
+    - SB_CONFIG_EXPECTED_SB_TEST_FOO_VAL=0
+    - SB_CONFIG_EXPECTED_APP_TEST_FOO_VAL=12
+  # Test the `foo` snippet in sysbuild
+  buildsystem.sysbuild.snippets.applied:
+    extra_args:
+    - SNIPPET=foo
+    - SB_CONFIG_EXPECTED_SB_TEST_FOO_VAL=464372
+    - SB_CONFIG_EXPECTED_APP_TEST_FOO_VAL=18382