#include <stdio.h>
#include <stdlib.h>
#include "stack.h"

int main() {
    printf("===== TEST STACK =====\n");

    StackNode *s = NULL;

    // Test push
    int a = 10, b = 20, c = 30;
    s = push(s, &a);
    s = push(s, &b);
    s = push(s, &c);

    if (*(int*)top(s) != 30) {
        printf("FAIL: top() should return 30\n");
        return 1;
    }
    printf("PASS: push + top\n");

    // Test pop
    s = pop(s);
    if (*(int*)top(s) != 20) {
        printf("FAIL: pop() should remove 30\n");
        return 1;
    }
    printf("PASS: pop\n");

    // Clear
    clearStack(s);
    printf("PASS: clearStack (no crash)\n");

    printf("ALL STACK TESTS PASSED\n");
    return 0;
}