// Calc unit test
#include "calc.h"

#include <assert.h>
#include <stdbool.h>


static void sum_test() {
    int sum;

    sum = calc_sum(1,30);
    assert(sum == 31 && "test_sum: positive sum");

    sum = calc_sum(1,-30);
    assert(sum == -29 && "test_sum: negative sum");
}

int main() {
    sum_test();
}

// calc.h

int calc_sum(int oper1, int oper2);


// calc.c

#include "calc.h"

int calc_sum(int oper1, int oper2) {
    return oper1 + oper2;
}