test: Add test suite for libx52io/device.c

libx52io/meson.build

@@ -51,3 +51,9 @@ test_compare = executable('test-io-compare', 'test_compare.c', libx52io_files,
 )
 test('test-io-compare', test_compare, protocol: 'tap')
 
+test_device = executable('test-device', 'test_device.c', libx52io_files,
+  build_by_default: false,
+  dependencies: [dep_cmocka, dep_hidapi, dep_intl],
+  include_directories: [includes],
+)
+test('test-io-device', test_device, protocol: 'tap')

libx52io/test_device.c

@@ -0,0 +1,74 @@
+/*
+ * Saitek X52 IO driver - device info test suite
+ *
+ * Copyright (C) 2012-2026 Nirenjan Krishnan (nirenjan@nirenjan.org)
+ *
+ * SPDX-License-Identifier: GPL-2.0-only WITH Classpath-exception-2.0
+ */
+
+#include <stdarg.h>
+#include <stddef.h>
+#include <setjmp.h>
+#include <cmocka.h>
+
+#include <wchar.h>
+
+#include "common.h"
+#include "usb-ids.h"
+
+static void test_device_info(void **state)
+{
+    struct hid_device_info dev_info = {0};
+    libx52io_context ctx = {0};
+    wchar_t invalid_wcs[] = { (wchar_t)-1, L'\0' };
+
+    (void)state;
+
+    dev_info.vendor_id = VENDOR_SAITEK;
+    dev_info.product_id = X52_PROD_X52PRO;
+    dev_info.release_number = 0x1337;
+    dev_info.manufacturer_string = L"Saitek";
+    dev_info.product_string = invalid_wcs;
+    dev_info.serial_number = L"";
+
+    _x52io_save_device_info(&ctx, &dev_info);
+
+    assert_int_equal(ctx.vid, VENDOR_SAITEK);
+    assert_int_equal(ctx.pid, X52_PROD_X52PRO);
+    assert_int_equal(ctx.version, 0x1337);
+    assert_string_equal(ctx.manufacturer, "Saitek");
+    assert_null(ctx.product);
+    assert_null(ctx.serial_number);
+
+    assert_int_equal(libx52io_get_vendor_id(&ctx), VENDOR_SAITEK);
+    assert_int_equal(libx52io_get_product_id(&ctx), X52_PROD_X52PRO);
+    assert_int_equal(libx52io_get_device_version(&ctx), 0x1337);
+    assert_string_equal(libx52io_get_manufacturer_string(&ctx), "Saitek");
+    assert_null(libx52io_get_product_string(&ctx));
+    assert_null(libx52io_get_serial_number_string(&ctx));
+
+    _x52io_release_device_info(&ctx);
+}
+
+static void test_null_handling(void **state)
+{
+    (void)state;
+    assert_int_equal(libx52io_get_vendor_id(NULL), 0);
+    assert_int_equal(libx52io_get_product_id(NULL), 0);
+    assert_int_equal(libx52io_get_device_version(NULL), 0);
+    assert_null(libx52io_get_manufacturer_string(NULL));
+    assert_null(libx52io_get_product_string(NULL));
+    assert_null(libx52io_get_serial_number_string(NULL));
+}
+
+const struct CMUnitTest tests[] = {
+    cmocka_unit_test(test_device_info),
+    cmocka_unit_test(test_null_handling),
+};
+
+int main(void)
+{
+    cmocka_set_message_output(CM_OUTPUT_TAP);
+    cmocka_run_group_tests(tests, NULL, NULL);
+    return 0;
+}