Path getSelectorFile(DescriptorDigest selector) {
    return cacheDirectory.resolve(SELECTORS_DIRECTORY).resolve(selector.getHash());
  }
@Test
  public void testGetSelectorFile() throws DigestException {
    DescriptorDigest selector =
        DescriptorDigest.fromHash(
            "cccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccc");

    Assert.assertEquals(
        Paths.get(
            "cache",
            "directory",
            "selectors",
            "cccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccc"),
        TEST_CACHE_STORAGE_FILES.getSelectorFile(selector));
  }