Unit test trong C

tests/test.h - framework tí hon

#include <stdio.h>
static int tests_checks = 0, tests_failed = 0;

/* 1) Mot khang dinh - KHONG abort de cac test sau van chay */
#define CHECK(cond) do {                                       \
    tests_checks++;                                            \
    if (!(cond)) { tests_failed++;                             \
        printf("  THAT BAI: %s  (dong %d)\n", #cond, __LINE__); } \
} while (0)

/* 2) Gom & chay mot ham test */
#define RUN(test) do { printf("== %s ==\n", #test); test(); } while (0)

/* 3) Bao cao + ma thoat cho CTest (0 = tat ca xanh) */
#define TEST_REPORT() \
    (printf("\n%d kiem tra, %d that bai\n", tests_checks, tests_failed), \
     tests_failed == 0 ? 0 : 1)

tests/test_stack.c - Arrange · Act · Assert

#include "stack.h"
#include "test.h"

/* error path: pop khi RONG phai duoc xu ly, khong duoc sap */
static void test_pop_khi_rong_duoc_xu_ly(void) {
    Stack *s = stack_create();      /* ARRANGE */
    int x = 123;
    CHECK(stack_pop(s, &x) == 0);   /* ACT + ASSERT: bao that bai */
    CHECK(x == 123);                /* va KHONG ghi vao *out      */
    stack_destroy(s);
}

/* table-driven: mot du lieu, lap qua nhieu truong hop */
static void test_table_driven(void) {
    int input[] = {1, 2, 3, 4, 5};
    int n = (int)(sizeof input / sizeof input[0]);
    Stack *s = stack_create();
    for (int i = 0; i < n; i++) CHECK(stack_push(s, input[i]) == 1);
    for (int i = n - 1; i >= 0; i--) {   /* pop ra thu tu nguoc */
        int x = 0;
        CHECK(stack_pop(s, &x) == 1);
        CHECK(x == input[i]);
    }
    stack_destroy(s);
}

int main(void) {
    RUN(test_pop_khi_rong_duoc_xu_ly);
    RUN(test_table_driven);
    /* ...cac test khac... */
    return TEST_REPORT();
}

== test_pop_khi_rong_duoc_xu_ly ==
== test_table_driven ==

17 kiem tra, 0 that bai

CMakeLists.txt (phần test)

add_library(stack src/stack.c)
target_include_directories(stack PUBLIC include)

enable_testing()                              # bat ctest
add_executable(test_stack tests/test_stack.c)
target_link_libraries(test_stack PRIVATE stack)
add_test(NAME stack_unit COMMAND test_stack)  # ctest se chay no

cùng test đó, bằng Unity

#include "unity.h"
#include "stack.h"

void setUp(void) {}      /* chay TRUOC moi test  */
void tearDown(void) {}   /* chay SAU moi test    */

void test_lifo(void) {
    Stack *s = stack_create();
    stack_push(s, 10);
    stack_push(s, 20);
    int x = 0;
    stack_pop(s, &x);
    TEST_ASSERT_EQUAL_INT(20, x);   /* assert co kieu cua Unity */
    stack_destroy(s);
}

int main(void) {
    UNITY_BEGIN();
    RUN_TEST(test_lifo);
    return UNITY_END();
}