settings: Add test for settings commit priority

Add a test to validate settings commit priority

Signed-off-by: Laczen JMS <laczenjms@gmail.com>

tests/subsys/settings_commit_prio/CMakeLists.txt

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

tests/subsys/settings_commit_prio/README.rst

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+.. _settings_commit_prio_test:
+
+Settings Subsystem commit priority Test
+#######################################
+
+Overview
+********
+
+This test is used to test the Settings Subsystem commit priority.
+
+Building and Testing
+********************
+
+This application can be built and executed on native_sim as follows:
+
+.. code-block:: console
+   $ ./scripts/twister -p native_sim -T tests/subsys/settings_commit_prio
+To build for another board, change ``native_sim`` above to that board's name.

tests/subsys/settings_commit_prio/prj.conf

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+CONFIG_TEST=y
+CONFIG_ZTEST=y
+CONFIG_LOG=y
+CONFIG_SETTINGS=y
+CONFIG_SETTINGS_DYNAMIC_HANDLERS=y

tests/subsys/settings_commit_prio/src/main.c

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+/*
+ * Copyright (c) 2024 Laczen
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+#include <errno.h>
+#include <zephyr/settings/settings.h>
+#include <zephyr/ztest.h>
+#include <zephyr/logging/log.h>
+
+LOG_MODULE_REGISTER(test);
+
+static int prio;
+
+int commit0(void)
+{
+	LOG_INF("%s Called", __func__);
+	zassert_equal(prio, 0, "Bad commit order");
+	prio++;
+	return 0;
+}
+
+int commit1(void)
+{
+	LOG_INF("%s Called", __func__);
+	zassert_equal(prio, 1, "Bad commit order");
+	prio++;
+	return 0;
+}
+
+int commit2(void)
+{
+	LOG_INF("%s Called", __func__);
+	zassert_equal(prio, 2, "Bad commit order");
+	prio++;
+	return 0;
+}
+
+int commit3(void)
+{
+	LOG_INF("%s Called", __func__);
+	zassert_equal(prio, 3, "Bad commit order");
+	prio++;
+	return 0;
+}
+
+int commit5(void)
+{
+	LOG_INF("%s Called", __func__);
+	zassert_equal(prio, 0, "Bad commit order");
+	return 0;
+}
+
+SETTINGS_STATIC_HANDLER_DEFINE_WITH_CPRIO(h0, "h0", NULL, NULL, commit0, NULL, 0);
+SETTINGS_STATIC_HANDLER_DEFINE_WITH_CPRIO(h2, "h2", NULL, NULL, commit2, NULL, 2);
+
+static struct settings_handler h1 = {
+	.name = "h1",
+	.h_commit = commit1,
+};
+
+static struct settings_handler h3 = {
+	.name = "h3",
+	.h_commit = commit3,
+};
+
+SETTINGS_STATIC_HANDLER_DEFINE_WITH_CPRIO(h5, "h5", NULL, NULL, commit5, NULL, -1);
+
+/**
+ * @brief Test Settings commit order
+ *
+ * This test verifies the settings commit order.
+ */
+ZTEST(settings_commit_prio, test_commit_order)
+{
+	int rc;
+
+	prio = 0;
+	rc = settings_register_with_cprio(&h1, 1);
+	zassert_equal(rc, 0, "Failed to register handler");
+	rc = settings_register_with_cprio(&h3, 3);
+	zassert_equal(rc, 0, "Failed to register handler");
+
+	rc = settings_commit();
+	zassert_equal(rc, 0, "Commit failed with code [%d]", rc);
+	zassert_equal(prio, 4, "Incorrect prio level reached [%d]", prio);
+}
+
+ZTEST_SUITE(settings_commit_prio, NULL, NULL, NULL, NULL, NULL);

tests/subsys/settings_commit_prio/testcase.yaml

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+tests:
+  settings.settings_commit_prio:
+    platform_allow: native_sim
+    tags: settings