tests: shell: add a test for shell_device_filter

Add a test for shell_device_filter and shell_device_lookup.

Signed-off-by: Fabio Baltieri <fabiobaltieri@google.com>

tests/subsys/shell/shell_device_filter/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(shell_device_filter)
+
+FILE(GLOB app_sources src/*.c)
+target_sources(app PRIVATE ${app_sources})

tests/subsys/shell/shell_device_filter/prj.conf

@@ -0,0 +1,7 @@
+# SPDX-License-Identifier: Apache-2.0
+
+CONFIG_ZTEST=y
+CONFIG_SHELL=y
+CONFIG_SHELL_BACKEND_SERIAL=n
+CONFIG_SHELL_BACKEND_DUMMY=n
+CONFIG_PM=y

tests/subsys/shell/shell_device_filter/src/main.c

@@ -0,0 +1,59 @@
+/*
+ * Copyright 2024 Google LLC
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+#include <string.h>
+#include <zephyr/device.h>
+#include <zephyr/kernel.h>
+#include <zephyr/shell/shell.h>
+#include <zephyr/ztest.h>
+
+DEVICE_DEFINE(device_0, "device@0", NULL, NULL,
+	      NULL, NULL,
+	      POST_KERNEL, 0, NULL);
+
+DEVICE_DEFINE(device_1, "device@1", NULL, NULL,
+	      NULL, NULL,
+	      POST_KERNEL, 1, NULL);
+
+DEVICE_DEFINE(device_2, "xx_device@2", NULL, NULL,
+	      NULL, NULL,
+	      POST_KERNEL, 2, NULL);
+
+static const struct device *d0 = &DEVICE_NAME_GET(device_0);
+static const struct device *d1 = &DEVICE_NAME_GET(device_1);
+static const struct device *d2 = &DEVICE_NAME_GET(device_2);
+
+ZTEST(shell_device_filter, test_unfiltered)
+{
+	zassert_equal_ptr(d0, shell_device_filter(0, NULL));
+	zassert_equal_ptr(d1, shell_device_filter(1, NULL));
+	zassert_equal_ptr(d2, shell_device_filter(2, NULL));
+	zassert_equal_ptr(NULL, shell_device_filter(3, NULL));
+
+	zassert_equal_ptr(d0, shell_device_lookup(0, NULL));
+	zassert_equal_ptr(d1, shell_device_lookup(1, NULL));
+	zassert_equal_ptr(d2, shell_device_lookup(2, NULL));
+	zassert_equal_ptr(NULL, shell_device_lookup(3, NULL));
+}
+
+ZTEST(shell_device_filter, test_prefix)
+{
+	zassert_equal_ptr(d2, shell_device_lookup(0, "xx_"));
+	zassert_equal_ptr(NULL, shell_device_lookup(1, "xx_"));
+}
+
+static bool pm_device_test_filter(const struct device *dev)
+{
+	return strstr(dev->name, "@1") != NULL;
+}
+
+ZTEST(shell_device_filter, test_filter)
+{
+	zassert_equal_ptr(d1, shell_device_filter(0, pm_device_test_filter));
+	zassert_equal_ptr(NULL, shell_device_filter(1, pm_device_test_filter));
+}
+
+ZTEST_SUITE(shell_device_filter, NULL, NULL, NULL, NULL, NULL);

tests/subsys/shell/shell_device_filter/testcase.yaml

@@ -0,0 +1,10 @@
+# SPDX-License-Identifier: Apache-2.0
+
+tests:
+  shell.device_filter:
+    platform_allow:
+      - native_sim
+    tags:
+      - shell
+    integration_platforms:
+      - native_sim