@Test
  public void shouldRetrieveLowLevelCacheEntryForDefaultBinaryStore() {
    final BinaryKey key = new BinaryKey("key-123");
    when(mockStoreFunc.apply(mockRepo)).thenReturn(mockStore);

    final LowLevelStorageService testObj = spy(new LowLevelStorageService());
    testObj.setRepository(mockRepo);
    testObj.setGetBinaryStore(mockStoreFunc);
    testObj.getLowLevelCacheEntries(key);
    verify(testObj, times(1)).getLowLevelCacheEntriesFromStore(mockStore, key);
  }
  @Test
  public void shouldReturnAnEmptySetForMissingBinaryStore() {

    when(mockStoreFunc.apply(mockRepo)).thenReturn(null);

    final LowLevelStorageService testObj = new LowLevelStorageService();
    testObj.setGetBinaryStore(mockStoreFunc);
    final Set<LowLevelCacheEntry> entries =
        testObj.getLowLevelCacheEntries(new BinaryKey("key-123"));

    assertEquals(0, entries.size());
  }
  @Test
  public void testGetBinaryBlobs() throws RepositoryException {

    when(mockNode.getProperty(JCR_DATA)).thenReturn(mockProperty);
    when(mockStore.toString()).thenReturn("foo");
    when(mockKeyFunc.apply(mockProperty)).thenReturn(mockKey);
    when(mockStoreFunc.apply(mockRepo)).thenReturn(mockStore);
    final LowLevelStorageService testObj = new LowLevelStorageService();
    testObj.setGetBinaryStore(mockStoreFunc);
    testObj.setGetBinaryKey(mockKeyFunc);
    testObj.setRepository(mockRepo);
    final Set<LowLevelCacheEntry> actual = testObj.getLowLevelCacheEntries(mockNode);
    assertEquals("/foo", actual.iterator().next().getExternalIdentifier());
  }
  @Test
  public void testTransformBinaryBlobs() throws RepositoryException {

    when(mockNode.getProperty(JcrConstants.JCR_DATA)).thenReturn(mockProperty);
    when(mockStore.toString()).thenReturn("foo");
    when(mockKeyFunc.apply(mockProperty)).thenReturn(mockKey);
    when(mockStoreFunc.apply(mockRepo)).thenReturn(mockStore);
    final LowLevelStorageService testObj = new LowLevelStorageService();
    testObj.setGetBinaryStore(mockStoreFunc);
    testObj.setGetBinaryKey(mockKeyFunc);
    testObj.setRepository(mockRepo);
    @SuppressWarnings("unchecked")
    final Function<LowLevelCacheEntry, String> testFunc = mock(Function.class);
    when(testFunc.apply(any(LowLevelCacheEntry.class))).thenReturn("bar");
    final Collection<String> actual = testObj.transformLowLevelCacheEntries(mockNode, testFunc);
    assertEquals("bar", actual.iterator().next());
    verify(testFunc).apply(any(LowLevelCacheEntry.class));
  }