@Test
public void testCacheManager() throws IOException
{

  CacheManager manager = new CacheManager();
  manager.setBackup(new DummyBackupStore());
  manager.initialize();
  Assert.assertEquals("manager initialization- value", "one", manager.primary.get(1));
  Assert.assertEquals("manager initializaton- total", 5, manager.primary.getKeys().size());
  Assert.assertEquals("backup hit", "six", manager.get(6));
  Assert.assertEquals("primary updated- total", 6, manager.primary.getKeys().size());
}