#include <assert.h>
#include <stdio.h>

#include "stack.h"

int main() {
    struct stack * S = stack_new();

    assert(stack_pop(S) == STACK_UNDERFLOW);

    stack_push(S, 100);
    stack_push(S, 32);

    assert(stack_pop(S) == 32);

    stack_push(S, 200);
    stack_push(S, 50);

    assert(stack_pop(S) == 50);

    stack_print(S);

    assert(stack_pop(S) == 200);
    assert(stack_pop(S) == 100);
    assert(stack_pop(S) == STACK_UNDERFLOW);

    stack_destroy(S);

    printf("test passed.\n");
}