/**
 * @file    test_common.h
 * @brief   最小 C 测试框架 — 无外部依赖
 *
 * 用法：
 *   #include "test_common.h"
 *   TEST(test_name) { ASSERT_EQ(a, b); }
 *   int main(void) { RUN_ALL; return 0; }
 */

#ifndef TEST_COMMON_H
#define TEST_COMMON_H

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <math.h>

/* ── 断言 ── */

static int __test_pass = 0;
static int __test_fail = 0;
static const char *__current_test = "";

#define ASSERT_EQ(a, b)   do { if ((a) != (b)) { \
    printf("  FAIL %s:%d: ASSERT_EQ(%s, %s) — actual=%ld expected=%ld\n", \
           __FILE__, __LINE__, #a, #b, (long)(a), (long)(b)); __test_fail++; return; } \
    } while(0)

#define ASSERT_EQ_U(a, b) do { if ((a) != (b)) { \
    printf("  FAIL %s:%d: ASSERT_EQ(%s, %s) — actual=%lu expected=%lu\n", \
           __FILE__, __LINE__, #a, #b, (unsigned long)(a), (unsigned long)(b)); __test_fail++; return; } \
    } while(0)

#define ASSERT_NEQ(a, b)  do { if ((a) == (b)) { \
    printf("  FAIL %s:%d: ASSERT_NEQ(%s, %s) — both=%ld\n", \
           __FILE__, __LINE__, #a, #b, (long)(a)); __test_fail++; return; } \
    } while(0)

#define ASSERT_TRUE(cond) do { if (!(cond)) { \
    printf("  FAIL %s:%d: ASSERT_TRUE(%s) — false\n", \
           __FILE__, __LINE__, #cond); __test_fail++; return; } \
    } while(0)

#define ASSERT_FALSE(cond) do { if (cond) { \
    printf("  FAIL %s:%d: ASSERT_FALSE(%s) — true\n", \
           __FILE__, __LINE__, #cond); __test_fail++; return; } \
    } while(0)

#define ASSERT_STR_EQ(a, b) do { if (strcmp((a), (b)) != 0) { \
    printf("  FAIL %s:%d: ASSERT_STR_EQ — actual=\"%s\" expected=\"%s\"\n", \
           __FILE__, __LINE__, (a), (b)); __test_fail++; return; } \
    } while(0)

#define ASSERT_FLOAT_EQ(a, b, tol) do { if (fabs((a)-(b)) > (tol)) { \
    printf("  FAIL %s:%d: ASSERT_FLOAT_EQ — actual=%f expected=%f\n", \
           __FILE__, __LINE__, (double)(a), (double)(b)); __test_fail++; return; } \
    } while(0)

/* ── 测试注册 ── */

#define TEST(name)  static void test_##name(void)

#define RUN_TEST(name) do { \
    __current_test = #name; \
    printf("  [TEST] %s\n", #name); \
    test_##name(); \
    if (__test_fail) printf("  [FAIL] %s\n", #name); \
    else printf("  [PASS] %s\n", #name); \
} while(0)

#define RUN_ALL do { \
    printf("\n=== Running Tests ===\n\n"); \
    __test_fail = 0; \
    TEST_LIST \
    printf("\n=== Results: %d passed, %d failed ===\n", \
           __test_pass, __test_fail); \
} while(0)

#endif /* TEST_COMMON_H */