78 lines
2.4 KiB
C
78 lines
2.4 KiB
C
/* P0 测试：remoteDisplay 协议核心
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* 目标：
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* - 校验 CRC 纯函数行为（calc_crc）
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* - 校验 RemoDispBus 帧解析边界（parse_frame）
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*/
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#include <stdint.h>
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#include "test_common.h"
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/* 直接包含 .c 以访问 static 函数（calc_crc / parse_frame） */
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#include "../src/remoteDisplay.c"
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/* 用例1：CRC 计算
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* - 空数据长度应返回 0
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* - 常规 payload 应返回逐字节异或结果
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*/
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static int test_calc_crc(void)
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{
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const uint8_t payload[] = {0x12, 0x34, 0x56};
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ASSERT_EQ_INT(0x00, calc_crc(NULL, 0));
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ASSERT_EQ_INT((0x12 ^ 0x34 ^ 0x56), calc_crc(payload, 3));
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return 0;
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}
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/* 用例2：合法帧解析
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* 验证：
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* - parse_frame 返回成功
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* - cmd/data/data_len/consume 与期望一致
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*/
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static int test_parse_frame_ok(void)
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{
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uint8_t cmd = 0;
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const uint8_t* data = NULL;
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unsigned int data_len = 0;
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unsigned int consume = 0;
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const uint8_t payload[] = {0x10, 0x20};
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const uint8_t frame[] = {0xAA, 0x03, 0x00, 0x02, 0x10, 0x20, (uint8_t)(0x10 ^ 0x20)};
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ASSERT_EQ_INT(1, parse_frame(frame, sizeof(frame), &cmd, &data, &data_len, &consume));
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ASSERT_EQ_INT(0x03, cmd);
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ASSERT_EQ_INT(2, (int)data_len);
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ASSERT_EQ_INT((int)sizeof(frame), (int)consume);
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ASSERT_EQ_INT(payload[0], data[0]);
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ASSERT_EQ_INT(payload[1], data[1]);
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return 0;
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}
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/* 用例3：非法输入集合
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* - TAG 非客户端 TAG
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* - 帧长度不足（截断）
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* - CRC 错误
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* 期望均解析失败（返回 0）
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*/
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static int test_parse_frame_invalid_cases(void)
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{
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uint8_t cmd = 0;
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const uint8_t* data = NULL;
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unsigned int data_len = 0;
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unsigned int consume = 0;
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const uint8_t bad_tag[] = {0xBB, 0x03, 0x00, 0x00, 0x00};
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const uint8_t short_buf[] = {0xAA, 0x03, 0x00, 0x01};
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const uint8_t bad_crc[] = {0xAA, 0x02, 0x00, 0x01, 0x55, 0x00};
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ASSERT_EQ_INT(0, parse_frame(bad_tag, sizeof(bad_tag), &cmd, &data, &data_len, &consume));
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ASSERT_EQ_INT(0, parse_frame(short_buf, sizeof(short_buf), &cmd, &data, &data_len, &consume));
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ASSERT_EQ_INT(0, parse_frame(bad_crc, sizeof(bad_crc), &cmd, &data, &data_len, &consume));
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return 0;
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}
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/* 测试入口：按顺序执行各子用例，任一失败即返回非 0 */
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int main(void)
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{
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if (test_calc_crc() != 0) return 1;
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if (test_parse_frame_ok() != 0) return 1;
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if (test_parse_frame_invalid_cases() != 0) return 1;
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return 0;
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}
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