使用宏测试C++中的函数返回值

#include <iostream>

#define TEST_FUNCTION_RETURN_VALUE(function, expected) \
    do { \
        auto result = function; \
        if (result == expected) { \
            std::cout << "Test passed." << std::endl; \
        } else { \
            std::cout << "Test failed. Expected: " << expected << ", Actual: " << result << std::endl; \
        } \
    } while(0)

int add(int a, int b) {
    return a + b;
}

int main() {
    TEST_FUNCTION_RETURN_VALUE(add(2, 3), 5);
    TEST_FUNCTION_RETURN_VALUE(add(4, 6), 10);
    return 0;
}