[utest] add device find (#8959)

* [utest] add device find

Signed-off-by: Shell <[email protected]>

* fixup: add test

* fixup: ptr aliasing

* quality: meaning parameter

---------

Signed-off-by: Shell <[email protected]>

4 files changed, 70 insertions, 0 deletions

diff --git a/examples/utest/configs/kernel/device.conf b/examples/utest/configs/kernel/device.conf
new file mode 100644
index 0000000000..1b0bf5a59f
--- /dev/null
+++ b/examples/utest/configs/kernel/device.conf
@@ -0,0 +1,4 @@
+CONFIG_UTEST_DEVICE_TC=y
+# dependencies
+CONFIG_RT_USING_TIMER_SOFT=y
+CONFIG_RT_USING_THREAD=y
diff --git a/examples/utest/testcases/kernel/Kconfig b/examples/utest/testcases/kernel/Kconfig
index 072e1876a3..cc03ca0a4d 100644
--- a/examples/utest/testcases/kernel/Kconfig
+++ b/examples/utest/testcases/kernel/Kconfig
@@ -56,6 +56,10 @@ config UTEST_THREAD_TC
     select RT_USING_TIMER_SOFT
     select RT_USING_THREAD
 
+config UTEST_DEVICE_TC
+    bool "device test"
+    default n
+
 config UTEST_ATOMIC_TC
     bool "atomic test"
     default n
diff --git a/examples/utest/testcases/kernel/SConscript b/examples/utest/testcases/kernel/SConscript
index 67ad659d1c..1ec8beedd2 100644
--- a/examples/utest/testcases/kernel/SConscript
+++ b/examples/utest/testcases/kernel/SConscript
@@ -41,6 +41,9 @@ if GetDepend(['UTEST_MAILBOX_TC']):
 if GetDepend(['UTEST_THREAD_TC']):
     src += ['thread_tc.c']
 
+if GetDepend(['UTEST_DEVICE_TC']):
+    src += ['device_tc.c']
+
 if GetDepend(['UTEST_ATOMIC_TC']):
     src += ['atomic_tc.c']
 
diff --git a/examples/utest/testcases/kernel/device_tc.c b/examples/utest/testcases/kernel/device_tc.c
new file mode 100644
index 0000000000..6b5a8dfd86
--- /dev/null
+++ b/examples/utest/testcases/kernel/device_tc.c
@@ -0,0 +1,59 @@
+/*
+ * Copyright (c) 2006-2024, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ * 2024-05-20     Shell        the first version
+ */
+#include <rtthread.h>
+#include <stdlib.h>
+#include "utest.h"
+
+static void test_rt_device_find(void)
+{
+    char _device_name[RT_NAME_MAX + 1] = {0};
+    rt_device_t console;
+    rt_device_t device1, device2, device3;
+
+    console = rt_console_get_device();
+    uassert_not_null(console);
+    rt_memcpy(_device_name, console->parent.name, RT_NAME_MAX);
+
+    /* Test finding a device */
+    device1 = rt_device_find(_device_name);
+    uassert_true(device1 == console);
+
+    /* Test finding another device */
+    device2 = rt_device_find(RT_CONSOLE_DEVICE_NAME);
+    if (rt_strcmp(RT_CONSOLE_DEVICE_NAME, _device_name) == 0)
+    {
+        uassert_true(device2 == device1);
+    }
+    else
+    {
+        uassert_not_null(device2);
+        uassert_true(device2 != device1);
+    }
+
+    /* Test finding a device 3 */
+    device3 = rt_device_find(console->parent.name);
+    uassert_true(device1 == device3);
+}
+
+static rt_err_t utest_tc_init(void)
+{
+    return RT_EOK;
+}
+
+static rt_err_t utest_tc_cleanup(void)
+{
+    return RT_EOK;
+}
+
+static void testcase(void)
+{
+    UTEST_UNIT_RUN(test_rt_device_find);
+}
+UTEST_TC_EXPORT(testcase, "testcases.kernel.device.find", utest_tc_init, utest_tc_cleanup, 5);