test-random.c

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#include "uv.h"
#include "task.h"
 
#include <string.h>
 
static char scratch[256];
static int random_cb_called;
 
 
static void random_cb(uv_random_t* req, int status, void* buf, size_t buflen) {
  char zero[sizeof(scratch)];
 
  memset(zero, 0, sizeof(zero));
 
  ASSERT(0 == status);
  ASSERT(buf == (void*) scratch);
 
  if (random_cb_called == 0) {
    ASSERT(buflen == 0);
    ASSERT(0 == memcmp(scratch, zero, sizeof(zero)));
  } else {
    ASSERT(buflen == sizeof(scratch));
    /* Buy a lottery ticket if you manage to trip this assertion. */
    ASSERT(0 != memcmp(scratch, zero, sizeof(zero)));
  }
 
  random_cb_called++;
}
 
 
TEST_IMPL(random_async) {
  uv_random_t req;
  uv_loop_t* loop;
 
  loop = uv_default_loop();
  ASSERT(UV_EINVAL == uv_random(loop, &req, scratch, sizeof(scratch), -1,
                                random_cb));
  ASSERT(UV_E2BIG == uv_random(loop, &req, scratch, -1, -1, random_cb));
 
  ASSERT(0 == uv_random(loop, &req, scratch, 0, 0, random_cb));
  ASSERT(0 == random_cb_called);
 
  ASSERT(0 == uv_run(loop, UV_RUN_DEFAULT));
  ASSERT(1 == random_cb_called);
 
  ASSERT(0 == uv_random(loop, &req, scratch, sizeof(scratch), 0, random_cb));
  ASSERT(1 == random_cb_called);
 
  ASSERT(0 == uv_run(loop, UV_RUN_DEFAULT));
  ASSERT(2 == random_cb_called);
 
  MAKE_VALGRIND_HAPPY();
  return 0;
}
 
 
TEST_IMPL(random_sync) {
  char zero[256];
  char buf[256];
 
  ASSERT(UV_EINVAL == uv_random(NULL, NULL, buf, sizeof(buf), -1, NULL));
  ASSERT(UV_E2BIG == uv_random(NULL, NULL, buf, -1, -1, NULL));
 
  memset(buf, 0, sizeof(buf));
  ASSERT(0 == uv_random(NULL, NULL, buf, sizeof(buf), 0, NULL));
 
  /* Buy a lottery ticket if you manage to trip this assertion. */
  memset(zero, 0, sizeof(zero));
  ASSERT(0 != memcmp(buf, zero, sizeof(zero)));
 
  MAKE_VALGRIND_HAPPY();
  return 0;
}