private boolean expect(ObjectContainer container, String[] names) {
   Collection4 expected = new Collection4(names);
   ObjectSet actual = container.query(CrashData.class);
   while (actual.hasNext()) {
     CrashData current = (CrashData) actual.next();
     if (!expected.remove(current._name)) {
       return false;
     }
   }
   return expected.isEmpty();
 }
 private void populate(ObjectContainer container) {
   for (int i = 0; i < 10; i++) {
     container.store(new Item("delme"));
   }
   CrashData one = new CrashData(null, "one");
   CrashData two = new CrashData(one, "two");
   CrashData three = new CrashData(one, "three");
   container.store(one);
   container.store(two);
   container.store(three);
   container.commit();
   ObjectSet objectSet = container.query(Item.class);
   while (objectSet.hasNext()) {
     container.delete(objectSet.next());
   }
 }
    /** @sharpen.remove */
    public void test() throws IOException {

      boolean cached = USE_CACHE.value().booleanValue();
      boolean useLogFile = USE_LOGFILE.value().booleanValue();
      boolean writeTrash = WRITE_TRASH.value().booleanValue();

      if (cached && writeTrash) {
        System.err.println(
            "DISABLED CrashSimulatingTestCase: combination of write trash and cache");
        // The cache may touch more bytes than the ones we modified.
        // We should be safe even if we don't get this test to pass.
        return;
      }

      if (useLogFile && writeTrash) {
        System.err.println(
            "DISABLED CrashSimulatingTestCase: combination of write trash and use log file");

        // The log file is not a public API yet anyway.
        // It's only needed for the PointerBasedIdSystem
        // With the new BTreeIdSystem it's not likely to become important
        // so we can safely ignore the failing write trash case.
        return;
      }

      if (Platform4.needsLockFileThread()) {
        System.out.println(
            "CrashSimulatingTestCase is ignored on platforms with lock file thread.");
        return;
      }

      String path = Path4.combine(Path4.getTempPath(), "crashSimulate");
      String fileName = Path4.combine(path, "cs");

      File4.delete(fileName);
      File4.mkdirs(path);

      createFile(baseConfig(useLogFile), fileName);

      CrashSimulatingStorage crashSimulatingStorage =
          new CrashSimulatingStorage(new FileStorage(), fileName);
      Storage storage =
          cached ? (Storage) new CachingStorage(crashSimulatingStorage) : crashSimulatingStorage;

      Configuration recordConfig = baseConfig(useLogFile);
      recordConfig.storage(storage);

      ObjectContainer oc = Db4o.openFile(recordConfig, fileName);

      ObjectSet objectSet = oc.queryByExample(new CrashData(null, "three"));
      oc.delete(objectSet.next());

      oc.store(new CrashData(null, "four"));
      oc.store(new CrashData(null, "five"));
      oc.store(new CrashData(null, "six"));
      oc.store(new CrashData(null, "seven"));
      oc.store(new CrashData(null, "eight"));
      oc.store(new CrashData(null, "nine"));
      oc.store(new CrashData(null, "10"));
      oc.store(new CrashData(null, "11"));
      oc.store(new CrashData(null, "12"));
      oc.store(new CrashData(null, "13"));
      oc.store(new CrashData(null, "14"));

      oc.commit();

      Query q = oc.query();
      q.constrain(CrashData.class);
      objectSet = q.execute();
      while (objectSet.hasNext()) {
        CrashData cData = (CrashData) objectSet.next();
        if (!(cData._name.equals("10") || cData._name.equals("13"))) {
          oc.delete(cData);
        }
      }

      oc.commit();

      oc.close();

      int count = crashSimulatingStorage._batch.writeVersions(fileName, writeTrash);

      checkFiles(useLogFile, fileName, "R", crashSimulatingStorage._batch.numSyncs());
      checkFiles(useLogFile, fileName, "W", count);
      if (VERBOSE) {
        System.out.println("Total versions: " + count);
      }
    }