Method test_deterministic

test/test_other.py:12241–12264

(self)

  @crossplatform
  def test_deterministic(self):
    # test some things that may not be nondeterministic
    create_file('src.c', r'''
#include <emscripten.h>
#include <stdio.h>
#include <stdlib.h>
#include <time.h>

int main () {
  struct timespec now;
  clock_gettime(CLOCK_REALTIME, &now);
  printf("C now: %lld %ld\n", now.tv_sec, now.tv_nsec);
  printf("js now: %f\n", emscripten_get_now());
  printf("C randoms: %d %d %d\n", rand(), rand(), rand());
  printf("JS random: %d\n", EM_ASM_INT({ return Math.random() }));
}
''&#x27;)
    self.run_process([EMCC, 'src.c', '--pre-js', path_from_root('src/deterministic.js')] + self.get_cflags())
    one = self.run_js('a.out.js')
    # ensure even if the time resolution is 1 second, that if we see the real
    # time we'll see a difference
    time.sleep(2)
    two = self.run_js('a.out.js')
    self.assertIdentical(one, two)

  def test_err(self):
    self.do_other_test('test_err.c')