@Test public void aFewEntriesWithRead(){
  assertNotNull(mem);
  int howMany=100000;
  for (int i=0; i < howMany; i++) {
    final byte[] payload=(test + " - " + i).getBytes();
    Pointer p=mem.store(payload);
    final byte[] check=mem.retrieve(p);
    assertNotNull(check);
    assertEquals(test + " - " + i,new String(check));
    long crc1=crc32(payload);
    long crc2=crc32(check);
    assertEquals(crc1,crc2);
  }
}