tests: zbus: add channel name test suite

Add tests to verify the zbus_chan_from_name() functionality when
CONFIG_ZBUS_CHANNEL_NAME is enabled.

Signed-off-by: Trond F. Christiansen <[email protected]>

Author: Trond-F-Christiansen

tests/subsys/zbus/channel_name/CMakeLists.txt

@@ -0,0 +1,7 @@
+cmake_minimum_required(VERSION 3.20.0)
+
+find_package(Zephyr REQUIRED HINTS $ENV{ZEPHYR_BASE})
+project(test_channel_name)
+
+FILE(GLOB app_sources src/main.c)
+target_sources(app PRIVATE ${app_sources})

tests/subsys/zbus/channel_name/prj.conf

@@ -0,0 +1,5 @@
+CONFIG_ZTEST=y
+CONFIG_ASSERT=n
+CONFIG_LOG=y
+CONFIG_ZBUS=y
+CONFIG_ZBUS_CHANNEL_NAME=y

tests/subsys/zbus/channel_name/src/main.c

@@ -0,0 +1,38 @@
+/*
+ * Copyright (c) 2024 Embeint Inc
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+#include <zephyr/zbus/zbus.h>
+#include <zephyr/ztest.h>
+#include <zephyr/ztest_assert.h>
+
+struct msg {
+	int x;
+};
+
+ZBUS_CHAN_DEFINE(chan_a, struct msg, NULL, NULL, ZBUS_OBSERVERS_EMPTY, ZBUS_MSG_INIT(0));
+ZBUS_CHAN_DEFINE(chan_b, struct msg, NULL, NULL, ZBUS_OBSERVERS_EMPTY, ZBUS_MSG_INIT(0));
+ZBUS_CHAN_DEFINE(chan_c, struct msg, NULL, NULL, ZBUS_OBSERVERS_EMPTY, ZBUS_MSG_INIT(0));
+ZBUS_CHAN_DEFINE(chan_d, struct msg, NULL, NULL, ZBUS_OBSERVERS_EMPTY, ZBUS_MSG_INIT(0));
+ZBUS_CHAN_DEFINE(chan_e, struct msg, NULL, NULL, ZBUS_OBSERVERS_EMPTY, ZBUS_MSG_INIT(0));
+ZBUS_CHAN_DEFINE(chan_f, struct msg, NULL, NULL, ZBUS_OBSERVERS_EMPTY, ZBUS_MSG_INIT(0));
+
+ZTEST(channel_name, test_channel_retrieval)
+{
+	/* Invalid/unknown channel names */
+	zassert_is_null(zbus_chan_from_name("unknown"));
+	zassert_is_null(zbus_chan_from_name(""));
+
+	/* Standard retrieval */
+	zassert_equal(&chan_a, zbus_chan_from_name("chan_a"));
+	zassert_equal(&chan_b, zbus_chan_from_name("chan_b"));
+	zassert_equal(&chan_c, zbus_chan_from_name("chan_c"));
+
+	/* Ensure no cross-talk between names */
+	zassert_not_equal(&chan_d, zbus_chan_from_name("chan_e"));
+	zassert_not_equal(&chan_e, zbus_chan_from_name("chan_f"));
+	zassert_not_equal(&chan_f, zbus_chan_from_name("chan_d"));
+}
+
+ZTEST_SUITE(channel_name, NULL, NULL, NULL, NULL, NULL);

tests/subsys/zbus/channel_name/testcase.yaml

@@ -0,0 +1,5 @@
+tests:
+  message_bus.zbus.channel_name:
+    tags: zbus
+    integration_platforms:
+      - native_sim