ZeroTierOne/ext/lwip/test/unit/core/test_mem.c

#include "test_mem.h"

#include "lwip/mem.h"
#include "lwip/stats.h"

#if !LWIP_STATS || !MEM_STATS
#error "This tests needs MEM-statistics enabled"
#endif
#if LWIP_DNS
#error "This test needs DNS turned off (as it mallocs on init)"
#endif

/* Setups/teardown functions */

static void
mem_setup(void)
{
}

static void
mem_teardown(void)
{
}


/* Test functions */

/** Call mem_malloc, mem_free and mem_trim and check stats */
START_TEST(test_mem_one)
{
#define SIZE1   16
#define SIZE1_2 12
#define SIZE2   16
  void *p1, *p2;
  mem_size_t s1, s2;
  LWIP_UNUSED_ARG(_i);

#if LWIP_DNS
  fail("This test needs DNS turned off (as it mallocs on init)");
#endif

  fail_unless(lwip_stats.mem.used == 0);

  p1 = mem_malloc(SIZE1);
  fail_unless(p1 != NULL);
  fail_unless(lwip_stats.mem.used >= SIZE1);
  s1 = lwip_stats.mem.used;

  p2 = mem_malloc(SIZE2);
  fail_unless(p2 != NULL);
  fail_unless(lwip_stats.mem.used >= SIZE2 + s1);
  s2 = lwip_stats.mem.used;

  mem_trim(p1, SIZE1_2);

  mem_free(p2);
  fail_unless(lwip_stats.mem.used <= s2 - SIZE2);

  mem_free(p1);
  fail_unless(lwip_stats.mem.used == 0);
}
END_TEST


/** Create the suite including all tests for this module */
Suite *
mem_suite(void)
{
  TFun tests[] = {
    test_mem_one
  };
  return create_suite("MEM", tests, sizeof(tests)/sizeof(TFun), mem_setup, mem_teardown);
}