#include <stdio.h>

#include <stdlib.h>

#include <string.h>

int

main (void)

{

  char *bp;

  size_t size;

  FILE *stream;

  int lose = 0;

  stream = open_memstream (&bp, &size);

  fprintf (stream, "hello");

  fflush (stream);

  printf ("buf = %s, size = %Zu\n", bp, size);

  lose |= size != 5;

  lose |= strncmp (bp, "hello", size);

  fprintf (stream, ", world");

  fclose (stream);

  printf ("buf = %s, size = %Zu\n", bp, size);

  lose |= size != 12;

  lose |= strncmp (bp, "hello, world", 12);

  puts (lose ? "Test FAILED!" : "Test succeeded.");

  free (bp);

  return lose;

}