tests: zbus: channel_id: test channel IDs

Test the new channel identifiers.

Signed-off-by: Jordan Yates <jordan@embeint.com>

tests/subsys/zbus/channel_id/CMakeLists.txt

@@ -0,0 +1,8 @@
+# SPDX-License-Identifier: Apache-2.0
+cmake_minimum_required(VERSION 3.20.0)
+
+find_package(Zephyr REQUIRED HINTS $ENV{ZEPHYR_BASE})
+project(test_channel_id)
+
+FILE(GLOB app_sources src/main.c)
+target_sources(app PRIVATE ${app_sources})

tests/subsys/zbus/channel_id/prj.conf

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+CONFIG_ZTEST=y
+CONFIG_ASSERT=n
+CONFIG_LOG=y
+CONFIG_ZBUS=y
+CONFIG_ZBUS_CHANNEL_ID=y
+CONFIG_ZBUS_CHANNEL_NAME=y

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

@@ -0,0 +1,54 @@
+/*
+ * 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;
+};
+
+enum channel_ids {
+	CHAN_A = 100,
+	CHAN_B = 123,
+	CHAN_C = 0x12343243,
+	CHAN_D = 123,
+	CHAN_E = 1,
+	CHAN_F = 357489,
+};
+
+ZBUS_CHAN_DEFINE_WITH_ID(chan_a, CHAN_A, struct msg, NULL, NULL, ZBUS_OBSERVERS_EMPTY,
+			 ZBUS_MSG_INIT(0));
+ZBUS_CHAN_DEFINE_WITH_ID(chan_b, CHAN_B, struct msg, NULL, NULL, ZBUS_OBSERVERS_EMPTY,
+			 ZBUS_MSG_INIT(0));
+ZBUS_CHAN_DEFINE_WITH_ID(chan_c, CHAN_C, struct msg, NULL, NULL, ZBUS_OBSERVERS_EMPTY,
+			 ZBUS_MSG_INIT(0));
+ZBUS_CHAN_DEFINE_WITH_ID(chan_d, CHAN_D, struct msg, NULL, NULL, ZBUS_OBSERVERS_EMPTY,
+			 ZBUS_MSG_INIT(0));
+ZBUS_CHAN_DEFINE_WITH_ID(chan_e, CHAN_E, struct msg, NULL, NULL, ZBUS_OBSERVERS_EMPTY,
+			 ZBUS_MSG_INIT(0));
+ZBUS_CHAN_DEFINE_WITH_ID(chan_f, CHAN_F, struct msg, NULL, NULL, ZBUS_OBSERVERS_EMPTY,
+			 ZBUS_MSG_INIT(0));
+ZBUS_CHAN_DEFINE(chan_g, struct msg, NULL, NULL, ZBUS_OBSERVERS_EMPTY, ZBUS_MSG_INIT(0));
+
+ZTEST(channel_id, test_channel_retrieval)
+{
+	/* Invalid/unknown channel IDs */
+	zassert_is_null(zbus_chan_from_id(0x1000000));
+	zassert_is_null(zbus_chan_from_id(ZBUS_CHAN_ID_INVALID));
+
+	/* Standard retrieval */
+	zassert_equal(&chan_a, zbus_chan_from_id(CHAN_A));
+	zassert_equal(&chan_c, zbus_chan_from_id(CHAN_C));
+	zassert_equal(&chan_e, zbus_chan_from_id(CHAN_E));
+	zassert_equal(&chan_f, zbus_chan_from_id(CHAN_F));
+
+	/* Duplicate channel IDs */
+	zassert_true((&chan_b == zbus_chan_from_id(CHAN_B)) ||
+		     (&chan_d == zbus_chan_from_id(CHAN_B)));
+}
+
+ZTEST_SUITE(channel_id, NULL, NULL, NULL, NULL, NULL);

tests/subsys/zbus/channel_id/testcase.yaml

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+tests:
+  message_bus.zbus.channel_id:
+    tags: zbus
+    integration_platforms:
+      - native_sim
+    harness: console
+    harness_config:
+      type: one_line
+      regex:
+        - "Channels (.*) and (.*) have matching IDs (.*)"