Quelle  hid-uclogic-rdesc-test.c   Sprache: C

// SPDX-License-Identifier: GPL-2.0+

/*
 *  HID driver for UC-Logic devices not fully compliant with HID standard
 *
 *  Copyright (c) 2022 José Expósito <jose.exposito89@gmail.com>
 */

#include <kunit/test.h>
#include "./hid-uclogic-rdesc.h"

MODULE_IMPORT_NS("EXPORTED_FOR_KUNIT_TESTING");

struct uclogic_template_case {
 const char *name;
 const __u8 *template;
 size_t template_size;
 const s32 *param_list;
 size_t param_num;
 const __u8 *expected;
};

static const s32 params_pen_all[UCLOGIC_RDESC_PH_ID_NUM] = {
 [UCLOGIC_RDESC_PEN_PH_ID_X_LM] = 0xAA,
 [UCLOGIC_RDESC_PEN_PH_ID_X_PM] = 0xBB,
 [UCLOGIC_RDESC_PEN_PH_ID_Y_LM] = 0xCC,
 [UCLOGIC_RDESC_PEN_PH_ID_Y_PM] = 0xDD,
 [UCLOGIC_RDESC_PEN_PH_ID_PRESSURE_LM] = 0xEE,
};

static const s32 params_pen_some[] = {
 [UCLOGIC_RDESC_PEN_PH_ID_X_LM] = 0xAA,
 [UCLOGIC_RDESC_PEN_PH_ID_X_PM] = 0xBB,
};

static const s32 params_frame_all[UCLOGIC_RDESC_PH_ID_NUM] = {
 [UCLOGIC_RDESC_FRAME_PH_ID_UM] = 0xFF,
};

static const __u8 template_empty[] = { };
static const __u8 template_small[] = { 0x00 };
static const __u8 template_no_ph[] = { 0xAA, 0xFE, 0xAA, 0xED, 0x1D };

static const __u8 template_pen_ph_end[] = {
 0xAA, 0xBB, UCLOGIC_RDESC_PEN_PH_HEAD
};

static const __u8 template_btn_ph_end[] = {
 0xAA, 0xBB, UCLOGIC_RDESC_FRAME_PH_BTN_HEAD
};

static const __u8 template_pen_all_params[] = {
 UCLOGIC_RDESC_PEN_PH(X_LM),
 0x47, UCLOGIC_RDESC_PEN_PH(X_PM),
 0x27, UCLOGIC_RDESC_PEN_PH(Y_LM),
 UCLOGIC_RDESC_PEN_PH(Y_PM),
 0x00, UCLOGIC_RDESC_PEN_PH(PRESSURE_LM),
};

static const __u8 expected_pen_all_params[] = {
 0xAA, 0x00, 0x00, 0x00,
 0x47, 0xBB, 0x00, 0x00, 0x00,
 0x27, 0xCC, 0x00, 0x00, 0x00,
 0xDD, 0x00, 0x00, 0x00,
 0x00, 0xEE, 0x00, 0x00, 0x00,
};

static const __u8 template_frame_all_params[] = {
 0x01, 0x02,
 UCLOGIC_RDESC_FRAME_PH_BTN,
 0x99,
};

static const __u8 expected_frame_all_params[] = {
 0x01, 0x02,
 0x2A, 0xFF, 0x00,
 0x99,
};

static const __u8 template_pen_some_params[] = {
 0x01, 0x02,
 UCLOGIC_RDESC_PEN_PH(X_LM),
 0x03, UCLOGIC_RDESC_PEN_PH(X_PM),
 0x04, 0x05,
};

static const __u8 expected_pen_some_params[] = {
 0x01, 0x02,
 0xAA, 0x00, 0x00, 0x00,
 0x03, 0xBB, 0x00, 0x00, 0x00,
 0x04, 0x05,
};

static const __u8 template_params_none[] = {
 0x27, UCLOGIC_RDESC_PEN_PH(Y_LM),
 UCLOGIC_RDESC_PEN_PH(Y_PM),
 0x00, UCLOGIC_RDESC_PEN_PH(PRESSURE_LM),
};

static struct uclogic_template_case uclogic_template_cases[] = {
 {
  .name = "empty_template",
  .template = template_empty,
  .template_size = sizeof(template_empty),
  .param_list = params_pen_all,
  .param_num = ARRAY_SIZE(params_pen_all),
  .expected = template_empty,
 },
 {
  .name = "template_smaller_than_the_placeholder",
  .template = template_small,
  .template_size = sizeof(template_small),
  .param_list = params_pen_all,
  .param_num = ARRAY_SIZE(params_pen_all),
  .expected = template_small,
 },
 {
  .name = "no_placeholder",
  .template = template_no_ph,
  .template_size = sizeof(template_no_ph),
  .param_list = params_pen_all,
  .param_num = ARRAY_SIZE(params_pen_all),
  .expected = template_no_ph,
 },
 {
  .name = "pen_placeholder_at_the_end_without_id",
  .template = template_pen_ph_end,
  .template_size = sizeof(template_pen_ph_end),
  .param_list = params_pen_all,
  .param_num = ARRAY_SIZE(params_pen_all),
  .expected = template_pen_ph_end,
 },
 {
  .name = "frame_button_placeholder_at_the_end_without_id",
  .template = template_btn_ph_end,
  .template_size = sizeof(template_btn_ph_end),
  .param_list = params_frame_all,
  .param_num = ARRAY_SIZE(params_frame_all),
  .expected = template_btn_ph_end,
 },
 {
  .name = "all_params_present_in_the_pen_template",
  .template = template_pen_all_params,
  .template_size = sizeof(template_pen_all_params),
  .param_list = params_pen_all,
  .param_num = ARRAY_SIZE(params_pen_all),
  .expected = expected_pen_all_params,
 },
 {
  .name = "all_params_present_in_the_frame_template",
  .template = template_frame_all_params,
  .template_size = sizeof(template_frame_all_params),
  .param_list = params_frame_all,
  .param_num = ARRAY_SIZE(params_frame_all),
  .expected = expected_frame_all_params,
 },
 {
  .name = "some_params_present_in_the_pen_template_with_complete_param_list",
  .template = template_pen_some_params,
  .template_size = sizeof(template_pen_some_params),
  .param_list = params_pen_all,
  .param_num = ARRAY_SIZE(params_pen_all),
  .expected = expected_pen_some_params,
 },
 {
  .name = "some_params_present_in_the_pen_template_with_incomplete_param_list",
  .template = template_pen_some_params,
  .template_size = sizeof(template_pen_some_params),
  .param_list = params_pen_some,
  .param_num = ARRAY_SIZE(params_pen_some),
  .expected = expected_pen_some_params,
 },
 {
  .name = "no_params_present_in_the_template",
  .template = template_params_none,
  .template_size = sizeof(template_params_none),
  .param_list = params_pen_some,
  .param_num = ARRAY_SIZE(params_pen_some),
  .expected = template_params_none,
 },
};

static void uclogic_template_case_desc(struct uclogic_template_case *t,
           char *desc)
{
 strscpy(desc, t->name, KUNIT_PARAM_DESC_SIZE);
}

KUNIT_ARRAY_PARAM(uclogic_template, uclogic_template_cases,
    uclogic_template_case_desc);

static void hid_test_uclogic_template(struct kunit *test)
{
 __u8 *res;
 const struct uclogic_template_case *params = test->param_value;

 res = uclogic_rdesc_template_apply(params->template,
        params->template_size,
        params->param_list,
        params->param_num);
 KUNIT_ASSERT_NOT_ERR_OR_NULL(test, res);
 KUNIT_EXPECT_MEMEQ(test, res, params->expected, params->template_size);
 kfree(res);
}

static struct kunit_case hid_uclogic_rdesc_test_cases[] = {
 KUNIT_CASE_PARAM(hid_test_uclogic_template, uclogic_template_gen_params),
 {}
};

static struct kunit_suite hid_uclogic_rdesc_test_suite = {
 .name = "hid_uclogic_rdesc_test",
 .test_cases = hid_uclogic_rdesc_test_cases,
};

kunit_test_suite(hid_uclogic_rdesc_test_suite);

MODULE_DESCRIPTION("KUnit tests for the UC-Logic driver");
MODULE_LICENSE("GPL");
MODULE_AUTHOR("José Expósito ");