### Question:
SimpleCache implements Cache { @Override public synchronized long getUid() { return uid; } @Deprecated  SimpleCache(File cacheDir, CacheEvictor evictor); @Deprecated  SimpleCache(File cacheDir, CacheEvictor evictor, @Nullable byte[] secretKey); @Deprecated  SimpleCache(
      File cacheDir, CacheEvictor evictor, @Nullable byte[] secretKey, boolean encrypt);  SimpleCache(File cacheDir, CacheEvictor evictor, DatabaseProvider databaseProvider);  SimpleCache(
      File cacheDir,
      CacheEvictor evictor,
      @Nullable DatabaseProvider databaseProvider,
      @Nullable byte[] legacyIndexSecretKey,
      boolean legacyIndexEncrypt,
      boolean preferLegacyIndex);   SimpleCache(
      File cacheDir,
      CacheEvictor evictor,
      CachedContentIndex contentIndex,
      @Nullable CacheFileMetadataIndex fileIndex); static synchronized boolean isCacheFolderLocked(File cacheFolder); @Deprecated static synchronized void disableCacheFolderLocking(); @Deprecated static void disableCacheInitializationExceptions(); static void delete(File cacheDir, @Nullable DatabaseProvider databaseProvider); synchronized void checkInitialization(); @Override synchronized long getUid(); @Override synchronized void release(); @Override synchronized NavigableSet<CacheSpan> addListener(String key, Listener listener); @Override synchronized void removeListener(String key, Listener listener); @NonNull @Override synchronized NavigableSet<CacheSpan> getCachedSpans(String key); @Override synchronized Set<String> getKeys(); @Override synchronized long getCacheSpace(); @Override synchronized SimpleCacheSpan startReadWrite(String key, long position); @Override @Nullable synchronized SimpleCacheSpan startReadWriteNonBlocking(String key, long position); @Override synchronized File startFile(String key, long position, long length); @Override synchronized void commitFile(File file, long length); @Override synchronized void releaseHoleSpan(CacheSpan holeSpan); @Override synchronized void removeSpan(CacheSpan span); @Override synchronized boolean isCached(String key, long position, long length); @Override synchronized long getCachedLength(String key, long position, long length); @Override synchronized void applyContentMetadataMutations(
      String key, ContentMetadataMutations mutations); @Override synchronized ContentMetadata getContentMetadata(String key);  }### Answer:
@Test public void testCacheInitializationError() throws IOException { assertThat(cacheDir.createNewFile()).isTrue(); SimpleCache cache = getSimpleCache(); long uid = cache.getUid(); assertThat(uid).isEqualTo(-1L); }