@Test
  public void testWhenBitmapRetrievalFails_ImageFileContainerIsDeleted() {
    BitmapRetriever retriever = getRetrieverForCachedImageFileThatFailsRetrieval();

    retriever.getBitmap();

    verify(fileCachedImage, atLeastOnce()).delete();
  }
  @Test
  public void testWhenBitmapRetrievalFails_ReferenceToCachedImageIsRemoved() {
    BitmapRetriever retriever = getRetrieverForCachedImageFileThatFailsRetrieval();

    retriever.getBitmap();

    verify(cacheManager, atLeastOnce()).remove(IMAGE_URL);
  }